Worksaver Brush Cutter SDM40 48 User Manual
OWNER’S/  
OPERATOR’S  
MANUAL  
MODEL NO’s  
SDM40-48  
SDM40-60  
SDM40-72  
CAUTION  
For Safe Operation  
Read Rules And  
Instructions Carefully  
SINO LEEINGLES, PIDA AYUDA  
A AIGUIEN QUE SI LO LEA  
PARA QUE LE TRADUZCA LAS  
MEDIDAS DE SEGURIDAD.  
STANDARD DUTY 3-PT. MOUNTED  
ROTARY CUTTER  
Safety Instructions  
Tractor Preparation  
Operating Instructions  
Assembly & Mounting  
Maintenance  
Repair Parts  
CAUTION  
THE FOLLOWING SAFETY PRECAUTIONS SHOULD BE THOROUGHLY UNDERSTOOD  
BEFORE ATTEMPTING TO BEGIN ASSEMBLING THIS MACHINE  
1. Select an area for assembly that is clean and free  
of any debris which might cause persons working  
on the assembly to trip.  
2. Do not lift heavy parts or assemblies. Use crane,  
jack, tackle, fork trucks or other mechanical devices.  
3. Preview the assembly instructions in your opera-  
tor’s manual before proceeding further.  
4. If the assembly instructions call for parts or assem-  
blies to be blocked up, use only blocking material  
that is in good condition and is capable of handling  
the weight of the assembly to be blocked. Also  
insure that the blocking material is on a clean, dry  
surface.  
6. After completing assembly, thoroughly inspect the  
machine to be sure that all nuts, bolts, hydraulic fit-  
tings or any other fastened assemblies have been  
thoroughly tightened.  
7. Before operating the machine, thoroughly read the  
operation section of your operator’s manual.  
8. Before operating, read the maintenance section of  
your operator’s manual to be sure that any parts  
requiring lubrication, such as gearboxes, are full, to  
avoid any possible damage.  
9. Before operating equipment – If you have any  
questions regarding the proper assembly or  
operation, contact your Worksaver dealer or  
representative.  
5. Never put hands, or any part of body, under  
blocked up assemblies if at all possible.  
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ROTARY CUTTER SPECIFICATIONS  
SUBJECT  
MODEL SDM40-48  
MODEL SDM40-60  
MODEL SDM40-72  
1
1
2
2
Cutting Width . . . . . . . . . . . . .  
Overall Length . . . . . . . . . . . .  
Overall Width . . . . . . . . . . . . .  
Cutting Height . . . . . . . . . . . . .  
Deck (Welded Construction) . .  
Front Side Skids . . . . . . . . . . .  
3 pt. Hitch . . . . . . . . . . . . . . . .  
Tailwheel . . . . . . . . . . . . . . . . .  
47”  
60 / ”  
71 / ”  
86”  
98”  
109”  
1
1
1
2
2
2
50 / ”  
62 / ”  
74 / ”  
1-5”  
1-5”  
1-5”  
11 Gauge (.119” thick)  
1
1
4
2
/ ” Thick x 2 / ”  
Category I Standard  
16” Diameter – Solid Rubber Tire  
Gearbox . . . . . . . . . . . . . . . . .  
Ratio . . . . . . . . . . . . . . . . . . . .  
Input RPM . . . . . . . . . . . . . . . .  
Output RPM . . . . . . . . . . . . . .  
Gearbox Warranty . . . . . . . . . .  
Gearbox Lubrication . . . . . . . .  
PTO Driveline Type . . . . . . . . .  
Total Driveline Length (Closed)  
Shearbolt . . . . . . . . . . . . . . . .  
30 HP Maximum  
1:1.92  
40 HP Maximum Rating  
1:1.47  
540 RPM  
540 RPM  
1036.8 RPM  
793.8 RPM  
Limited 1 Year  
90 wt Gear Oil  
Metric Series 4  
37”  
32”  
43”  
1
2
/ ” Diameter x 3.0” Bolt Grade 2  
Blades (Number & Type) . . . . .  
Width & Thickness . . . . . . . . .  
Length (Total) . . . . . . . . . . . . .  
Tip Speed . . . . . . . . . . . . . . . .  
(2) Suction Type  
1
2
/ ” x 3”  
18”  
25”  
30”  
12,757 Ft./Min.  
12,255 Ft./Min.  
15,170 Ft./Min.  
Blade Carrier . . . . . . . . . . . . . .  
Thickness . . . . . . . . . . . . . . . .  
Construction . . . . . . . . . . . . . .  
Stump Jumper Type  
3
8
/ ”  
Welded  
480 lb.  
Shipping Weight . . . . . . . . . . .  
395 lb.  
575 lb.  
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CHECKLISTS  
DELIVERY CHECKLIST  
DAILY CHECKLIST  
Inspect the cutter thoroughly after assembly to be certain h Check that cutter is properly and securely attached  
it is set up properly. The following checklist is a reminder  
of points to inspect. Check off each item as it is found  
satisfactory or after proper adjustment is made.  
to tractor.  
h
h
h
h
During inspection, check that all nuts and bolts are  
secure and that all safety shields are in place.  
h
Check operator's manual and familiarize the opera-  
tor with all sections of it.  
It is very important that the blade carrier nut and  
blade bolts are checked and tightened frequently.  
h
h
Check that all safety shielding is in place.  
Check condition of blades and security of attach-  
ment.  
Check all bolts to be sure they are tight or adjusted  
properly at hinged locations.  
Check that PTO driveline shields are securely  
locked and clears the front of the cutter frame.  
h
h
Check that all cotter pins are properly installed.  
Check PTO driveline. Make sure it is the correct h Adjust the tractor top link so the front of the cutter is  
length to operate cutter with intended tractor.  
slightly above the rear. Then raise the tractor lift very  
slowly, making sure that the front drive shaft shield  
does not hit the front of the cutter. If it does, damage  
will be done to the drive shaft shield and, if it hits  
hard enough, it will also damage the drive shaft  
itself. (See page 20.)  
h
h
Check that all lubrication points with grease fittings  
have been lubricated.  
Check that blades have been properly installed.  
Check all blade beam bolts.  
NOTE: This type of damage is not covered  
under warranty, as it is totally under the control  
and the responsibility of the operator.  
h
h
Check cutter attitude, after mounting on tractor.  
Check that gearbox is properly serviced and seals  
are not leaking.  
h
h
Check shear bolt for proper grade and installation.  
Check front of input gearbox shaft and make sure  
that snap ring is properly installed.  
h
h
All safety signs (decals) in place and readable.  
When the cutter is transported on a road or highway  
at night or during the day, safety devices should be  
used for adequate warning to operators of other  
vehicles.  
IMPORTANT!  
Gearbox was not filled at factory. It  
must be serviced before operating.  
Fill to proper level with SAE 90 oil.  
Failure to service will result in  
damage to gearbox.  
3
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To the Owner/Operator/Dealer  
All implements with moving parts are potentially hazardous. There is no substitute for a cautious, safe-minded opera-  
tor who recognizes the potential hazards and follows reasonable safety practices. The manufacturer has designed this  
implement to be used with all its safety equipment properly attached to minimize the chance of accidents.  
BEFORE YOU START!!  
Read the safety messages on the implement and shown in your manual.  
Observe the rules of safety and common sense!  
THIS SAFETY ALERT SYMBOL IDENTIFIES IMPORTANT  
SAFETY WARNING MESSAGES. CAREFULLY READ EACH  
WARNING MESSAGE THAT FOLLOWS. FAILURE TO  
UNDERSTAND AND OBEY A SAFETY WARNING, OR  
RECOGNIZE A SAFETY HAZARD, COULD RESULT IN AN  
THIS SYMBOL MEANS  
INJURY OR DEATH TO YOU OR OTHERS AROUND YOU.  
THE OPERATOR IS ULTIMATELY RESPONSIBLE FOR THE  
SAFETY OF HIMSELF, AS WELL AS OTHERS, IN THE  
OPERATING AREA OF THE TRACTOR AND ATTACHED  
EQUIPMENT.  
– ATTENTION!  
– BECOME ALERT!  
– YOUR SAFETY IS INVOLVED!  
UNDERSTAND SIGNAL WORDS  
Note the use of the signal words DANGER, WARNING  
and CAUTION with the safety messages. The  
appropriate signal word for each has been selected  
using the following guidelines:  
WARNING: Indicates a potentially hazardous sit-  
uation that, if not avoided, could result in death  
or serious injury, and includes hazards that are  
exposed when guards are removed. It may also  
be used to alert against unsafe practices.  
DANGER: Indicates an imminently hazardous situation  
that, if not avoided, will result in death or serious injury.  
This signal word is to be limited to the most extreme  
situations typically for machine components which, for  
functional purposes, cannot be guarded.  
CAUTION: Indicates a potentially hazardous sit-  
uation that, if not avoided, may result in minor or  
moderate injury. It may also be used to alert  
against unsafe practices.  
If you have questions not answered in this manual or require additional copies or the manual is damaged, please  
contact your dealer or the manufacturer directly.  
IMPORTANT SAFETY INFORMATION!  
Working with unfamiliar equipment can lead to careless injuries. Read this manual, and the manual for your tractor,  
before assembly or operating, to acquaint yourself with the machines. It is the implement owner’s responsibility, if this  
machine is used by any person other than yourself, is loaned or rented, to make certain that the operator, prior to  
operating:  
1. Reads and understands the operator’s manuals.  
2. Is instructed in safe and proper use.  
The use of this equipment is subject to certain hazards which cannot be protected against by mechanical  
means or product design. All operators of this equipment must read and understand this entire manual, paying  
particular attention to safety and operating instructions, prior to using. If there is something in this manual you  
do not understand, ask your supervisor, or your dealer, to explain it to you.  
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SAFETY INSTRUCTIONS (continued)  
EQUIPMENT SAFETY GUIDELINES  
Safety of the operator is one of the main concerns in designing and developing a new piece of equipment.  
Designers and manufacturers build in as many safety features as possible. However, every year many  
accidents occur which could have been avoided by a few seconds of thought and a more careful approach to  
handling equipment. You, the operator, can avoid many accidents by observing the following precautions in  
this section. To avoid personal injury, study the following precautions and insist those working with you, or for  
you, follow them.  
In order to provide a better view, certain photographs or illustrations in this manual may show an assembly  
with a safety shield removed. However, equipment should never be operated in this condition. Keep all shields  
in place. If shield removal becomes necessary for repairs, replace the shield prior to use.  
Replace any CAUTION, WARNING, DANGER or instruction safety sign that is not readable or is missing.  
Location of such safety signs is indicated in this booklet.  
Never use alcoholic beverages or drugs which can hinder alertness or coordination while operating this  
equipment. Consult your doctor about operating this machine while taking prescription medications.  
Review the safety instructions with all users annually.  
This equipment is dangerous to children and persons unfamiliar with its operation. The operator should be a  
responsible adult familiar with farm machinery and trained in this equipment’s operations. Do not allow  
persons to operate or assemble this unit until they have read this manual and have developed a  
thorough understanding of the safety precautions and of how it works.  
To prevent injury or death, use a tractor equipped with a Roll-Over Protective System (ROPS). Do not paint  
over, remove or deface any safety signs or warning signs on your equipment. Observe all safety signs and  
practice the instruction on them.  
Never exceed the limits of a piece of machinery. If its ability to do a job, or to do so safely, is in question –  
DON’T TRY IT.  
Do not modify the equipment in any way. Unauthorized modification may impair the function and/or safety and  
could affect the life of the equipment.  
In addition to the design and configuration of this implement, including Safety Signs and Safety Equipment,  
hazard control and accident prevention are dependent upon the awareness, concern, prudence, and proper  
training of personnel involved in the operation, transport, maintenance, and storage of the machine. Refer also  
to Safety Messages and Operation Instructions in each of the appropriate sections of the Tractor and Cutter  
Manuals. Pay close attention to the Safety Signs affixed to the Tractor and the Cutter.  
5
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SAFETY INSTRUCTIONS (continued)  
SAFETY SIGNS  
Keep safety signs clean and legible at all times.  
Replace safety signs that are missing or have become illegible.  
Replaced parts that displayed a safety sign should also display the current sign.  
Safety signs are available from your Distributor or Dealer Parts Department or the factory.  
How to Install Safety Signs:  
Be sure that the installation area is clean and dry.  
Be sure temperature is above 50˚F (10˚C).  
Decide on the exact position before you remove the backing paper.  
Remove the smallest portion of the split backing paper.  
Align the sign over the specified area and carefully press the small portion with the exposed sticky backing in  
place.  
Slowly peel back the remaining paper and carefully smooth the remaining portion of the sign in place.  
Small air pockets can be pierced with a pin and smoothed out using the piece of sign backing paper.  
TIRE SAFETY  
Failure to follow proper procedures when mounting a tire on a wheel or rim can produce an explosion which  
may result in serious injury or death.  
Do not attempt to mount a tire unless you have the proper equipment and experience to do the job.  
Inflating or servicing tires can be dangerous. Whenever possible, trained personnel should be called to service  
and/or mount tires.  
Always order and install tires and wheels with appropriate capacity to meet or exceed the anticipated weight  
to be placed on the equipment.  
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SAFETY INSTRUCTIONS (continued)  
SAFETY TRAINING  
Safety is a primary concern in the design and manufacture of our products. Unfortunately, our efforts to provide  
safe equipment can be wiped out by a single careless act of an operator.  
In addition to the design and configuration of equipment, hazard control and accident prevention are  
dependent upon the awareness, concern, prudence and proper training of personnel involved in the operation,  
transport, maintenance and storage of equipment.  
It has been said, “The best safety device is an informed, careful operator.” We ask you to be that kind of an  
operator. It is the operator’s responsibility to read and understand ALL Safety and Operating instructions in the  
manual and to follow these. Accidents can be avoided.  
Working with unfamiliar equipment can lead to careless injuries. Read this manual, and the manual for your  
tractor, before assembly or operating, to acquaint yourself with the machines. It is the rotary cutter owner’s  
responsibility, if this machine is used by any person other than yourself, is loaned or rented, to make certain  
that the operator, prior to operating:  
1. Reads and understands the operator’s manuals.  
2. Is instructed in safe and proper use.  
Know your controls and how to stop tractor, engine, and cutter quickly in an emergency. Read this manual and  
the one provided with your tractor.  
Train all new personnel and review instructions frequently with existing workers. A person who has not read  
and understood all operating and safety instructions is not qualified to operate the machine. An untrained  
operator exposes himself and bystanders to possible serious injury or death.  
Do not allow children to operate this machine.  
7
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SAFETY INSTRUCTIONS (continued)  
PREPARATION  
Never operate the tractor and cutter until you have read and completely understand this manual, the Tractor  
Operator’s Manual, and each of the Safety Messages found on the safety signs on the tractor and cutter.  
Personal protection equipment including hard hat, safety glasses, safety shoes, and gloves are recommended  
during assembly, installation, operation, adjustment, maintaining, repairing, removal, or moving the implement.  
Do not allow long hair, loose fitting clothing or jewelry to be around moving parts.  
PROLONGED EXPOSURE TO LOUD NOISE MAY CAUSE PERMANENT HEARING LOSS!  
Tractors with or without Cutters attached can often be noisy enough to cause permanent, partial hearing loss.  
We recommend that you wear hearing protection on a full-time basis if the noise in the Operator’s position  
exceeds 80db. Noise over 85db on a long-term basis can cause severe hearing loss. Noise over 90db  
adjacent to the Operator over a long-term basis may cause permanent, total hearing loss. NOTE: Hearing loss  
from loud noise (from tractors, chain saws, radios, and other such sources close to the ear) is cumulative over  
a lifetime without hope of natural recovery.  
Operate the cutter only with a tractor equipped with an approved Roll-Over Protective System (ROPS). Always  
wear your seat belt on tractors equipped with a ROPS. Serious injury or even death could result from falling  
off the tractor ---particularly during a turnover when the operator could be pinned under the ROPS or the  
tractor.  
Clear area to be cut of stones, branches or other debris that might be thrown, causing injury or damage.  
Operate only in daylight or good artificial light.  
Ensure cutter is properly mounted, adjusted and in good operating condition.  
Make sure driveline spring-activated locking pin or balls operate freely and are seated firmly in tractor PTO  
stub shaft groove.  
Ensure that all safety shielding and safety signs are properly installed and in good condition.  
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SAFETY INSTRUCTIONS (continued)  
STARTING AND STOPPING SAFETY  
Cutter operating power is supplied from tractor PTO. Refer to your tractor manual for PTO engagement and  
disengagement instructions. Always operate PTO at 540 RPM. Know how to stop tractor and cutter quickly in  
case of an emergency.  
When engaging PTO, the engine RPM should always be low. Once engaged and ready to start cutting, raise  
PTO speed to 540 RPM and maintain throughout cutting operation.  
Check the tractor master shield over the PTO stub shaft. Make sure it is in good condition and fastened  
securely to the tractor. Purchase a new shield if old shield is damaged or missing. (You may have to use a  
tractor salvage yard for replacement parts on older tractors.)  
All tractors that are not equipped with a “live” takeoff (PTO) need to be equipped with an over-running PTO  
clutch type driveline. These are available as optional equipment. See page 22.  
NOTE: The addition of a separate over-running PTO clutch attachment will change the length of the PTO  
driveline. Pay extra attention to the instructions on PTO driveline installation.  
Separate over-running clutch attachments will increase the length of the driveline and may cause the front  
knuckle joint to operate beyond the cover of the tractor master shield. This is NOT recommended and will  
present a dangerous operating condition.  
OPERATIONAL SAFETY  
The use of this equipment is subject to certain hazards which cannot be protected against by mechanical  
means or product design. All operators of this equipment must read and understand this entire manual, paying  
particular attention to safety and operating instructions, prior to using. If there is something in this manual you  
do not understand, ask your supervisor, or your dealer, to explain it to you.  
Most accidents occur because of neglect or carelessness. Keep all helpers and bystanders at least several  
hundred feet from an operating rotary cutter. Only properly trained people should operate this machine.  
When this machine is operated in populated areas or in other areas where thrown objects could injure persons  
or property, standard equipment safety chain shielding (which is designed to reduce the possibility of thrown  
objects) must be installed. If this machine is not equipped with full chain shielding, operation must be  
stopped when anyone comes within several hundred feet.  
The majority of accidents involve entanglement on the driveline, injury of bystanders by objects thrown by the  
rotating blades, and operators being knocked off the tractor by low hanging limbs and then being run over by  
the cutter. Accidents are most likely to occur with machines that are loaned or rented to someone who has not  
read the owner’s manual and is not familiar with a rotary cutter.  
9
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SAFETY INSTRUCTIONS (continued)  
OPERATIONAL SAFETY (continued)  
Always stop the tractor, set brake, shut off the tractor engine, remove the ignition key, lower implement to the  
ground and allow cutter blades to come to a complete stop before dismounting tractor. Never leave equipment  
unattended with the tractor running.  
Never place hands or feet under cutter with tractor engine running or before you are sure all motion has  
stopped. Stay clear of all moving parts.  
Do not reach or place yourself under equipment until it is blocked securely.  
Take all possible precautions when leaving unit unattended: Disengage PTO, set parking brake, stop engine  
and remove key from ignition. Park in level area.  
Do not allow riders on the rotary cutter or tractor at any time. There is no safe place for any riders.  
Disengage power takeoff (PTO) and place transmission into neutral before attempting to start engine.  
Do not operate unless all personnel, livestock, and pets are several hundred feet away to prevent injury by  
thrown objects. Never direct discharge toward anyone.  
Install and secure all guards and shields before starting or operating.  
Keep hands, feet, hair, and clothing away from moving parts.  
This rotary cutter is designed for use only on tractors with 540 RPM power takeoff.  
Never operate tractor and cutter under trees with low hanging limbs. Operators can be knocked off the tractor  
and then run over by the rotating blades.  
The rotating parts of this machine have been designed and tested for rugged use. However, they could fail  
upon impact with heavy, solid objects such as steel guard rails, posts, and concrete abutments. Such impact  
could cause the broken objects to be thrown outward at very high velocities. To reduce the possibility of  
property damage, serious injury, or even death, never allow the cutting blades to contact such obstacles.  
Frequently check cutter blades. They should be sharp, free of nicks and cracks and securely fastened.  
Many varied objects, such as wire, cable, rope, or chains, can become entangled in the operating parts of the  
cutter head. These items could then swing outside the housing at greater velocities than the blades. Such a  
situation is extremely hazardous. Inspect the cutting area for such objects before mowing. Removing any like  
object from the site. Never allow the cutting blades to contact such items.  
Pick up all rocks and other debris before mowing. Enter new areas carefully. Cut material higher at first,  
allowing cutter to clear hidden objects. Never assume an area is clear. Always Check!  
10  
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SAFETY INSTRUCTIONS (continued)  
OPERATIONAL SAFETY (continued)  
Stop cutter and tractor immediately upon striking an obstruction. Turn engine off, remove key, inspect and  
repair any damage before resuming operation.  
The chain guards, bands, flaps, driveline shields, and gearbox shields should be used and maintained in good  
working condition. They should be inspected carefully, at least daily, for missing or broken cable, chain links,  
shields, or guards. Missing broken, or worn items must be replaced at once to reduce the possibility of injury  
from thrown objects or entanglement.  
Stay alert for holes, rocks and roots in the terrain and other hidden hazards. Keep away from drop-offs.  
Use extreme care and maintain minimum ground speed when transporting on hillside, over rough ground and  
when operating close to ditches or fences. Be careful when turning sharp corners.  
Reduce speed on slopes and sharp turns to minimize tipping or loss of control. Be careful when changing  
directions on slopes. Do not start or stop suddenly on slopes. Avoid operation on steep slopes.  
When using a unit, a minimum 20% of tractor and equipment weight must be on tractor front wheels. Without  
this weight, tractor could tip over, causing personal injury or death. The weight may be attained with a front  
end loader, front wheel weights, ballast in tires of front tractor weights. When attaining a minimum 20% of  
tractor and equipment weight on the front wheels, you must not exceed the ROPS weight certification. Weigh  
the tractor and equipment. Do not guess or estimate!  
Inspect the entire machine periodically as indicated in the Maintenance Section of this manual. Look for loose  
fasteners, worn or broken parts, pinched hydraulic hoses, and leaky or loose fittings. Make sure all pins have  
cotter pins and washers. Serious injury may occur from not maintaining this machine in good working order.  
Be careful when operating tractor and cutter on uneven ground to avoid upsetting.  
In extremely uneven terrain, real wheel weights, front tractor weight, and/or tire ballast should be used to  
improve stability.  
Pass diagonally through sharp dips and avoid sharp drops to prevent “hanging up” tractor and cutter. Practice  
will improve your skills in maneuvering rough terrain.  
Avoid sudden starts and stops while traveling up or downhill.  
Always cut down slopes; never across the face. Avoid operation on steep slopes. Slow down on sharp turns  
and slopes to prevent tipping and/or loss of control.  
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SAFETY INSTRUCTIONS (continued)  
TRANSPORT SAFETY  
Comply with state and local laws governing highway safety and movement of farm machinery on public roads.  
The use of flashing amber lights is acceptable in most localities. However, some localities prohibit their use.  
Local laws should be checked for all highway lighting and marking requirements.  
When driving the tractor and equipment on the road or highway under 20 mph (32 kph) at night or during the  
day, use flashing amber warning lights and a slow moving vehicle (SMV) identification emblem.  
Always be sure the implement is in the proper raised position for transport.  
Reduce speed when transporting mounted implements to avoid bouncing and momentary loss of steering  
control.  
Plan your route to avoid heavy traffic.  
Always install transport locks, pins or brackets before transporting.  
Do not drink and drive!  
Watch for traffic when operating near or crossing roadways.  
Turn curves or go up or down hills only at a low speed and at a gradual steering angle. Make certain that at  
least 20% of the tractor’s weight is on the front wheels to maintain safe steerage. Slow down on rough or  
uneven surfaces, and loose gravel.  
Use extreme care and maintain minimum ground speed when transporting on hillside, over rough ground and  
when operating close to ditches or fences. Be careful when turning sharp corners.  
Never allow riders on either tractor or cutter. Falling off can kill.  
Be a safe and courteous driver. Always yield to oncoming traffic in all situations, including narrow bridges,  
intersections, etc.  
Do not exceed 20 mph (32 kph). Reduce speed on rough roads and surfaces.  
Use hardened hitch pins with retainers when attaching to pull-type machines.  
Use a safety chain to prevent unexpected separation with pull-type models.  
12  
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SAFETY INSTRUCTIONS (continued)  
MAINTENANCE SAFETY  
Good maintenance is your responsibility. Poor maintenance is an invitation to trouble.  
Follow good shop practices.  
- Keep service area clean and dry.  
- Be sure electrical outlets and tools are properly grounded.  
- Use adequate light for the job at hand.  
Make sure there is plenty of ventilation. Never operate the engine of the towing vehicle in a closed building.  
The exhaust fumes may cause asphyxiation.  
Before working on this machine, drive to a level area, disengage the PTO, lower implement (or if working  
underneath, raise and block securely), shut off the engine, set the brakes, and remove the ignition keys.  
Be certain all moving parts on attachments have come to a complete stop before attempting to perform  
maintenance.  
Never work under equipment unless it is blocked securely. Never depend on hydraulic system to keep  
implement in raised position.  
Keep all persons away from operator control area while performing adjustments, service, or maintenance.  
Always use personal protection devices such as eye, hand and hearing protectors, when performing any  
service or maintenance.  
Frequently check cutter blades. They should be sharp, free of nicks and cracks and securely fastened.  
Periodically tighten all bolts, nuts and screws and check that all cotter pins are properly installed to ensure unit  
is in a safe condition.  
When completing a maintenance or service function, make sure all safety shields and devices are installed  
before placing unit in service.  
Remove hydraulic pressure prior to doing any maintenance. Place the cutter wings on the ground or securely  
blocked up, disengage the PTO, and turn off the engine. Push and pull the remote cylinder lever in and out  
several times to relieve hydraulic pressure.  
Never use your hands to locate a hydraulic leak on attachments. Use a small piece of cardboard or wood.  
Hydraulic fluid escaping under pressure can penetrate the skin.  
Openings in the skin and minor cuts are susceptible to infection from hydraulic fluid. If injured by escaping  
hydraulic fluid, see a doctor at once. Gangrene and death can result. Without immediate medical treatment,  
serious infection and reactions can occur.  
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SAFETY INSTRUCTIONS (continued)  
MAINTENANCE SAFETY (continued)  
After servicing, be sure all tools, parts and service equipment are removed.  
Check to ensure all safety signs are installed and in good condition. (See safety sign section for location  
drawing.)  
Do not allow grease or oil to build up on any deck or platform.  
Never replace hex bolts with less than grade five bolts unless otherwise specified, i.e. shear bolts. Refer to  
bolt torque chart for head identification marking.  
Where replacement parts are necessary for periodic maintenance and servicing, genuine factory replacement  
parts must be used to restore your equipment to original specifications. The manufacturer will not claim  
responsibility for use of unapproved parts and/or accessories and other damages as a result of their use.  
If equipment has been altered in any way from original design, the manufacturer does not accept any liability  
for injury or warranty.  
A fire extinguisher and first aid kit should be kept readily accessible while performing maintenance on this  
equipment.  
STORAGE SAFETY  
Following operation, or when unhooking, stop the tractor, set the brakes, disengage the PTO, shut off the  
engine and remove the ignition keys.  
Never unhitch without using the tongue jack. The tongue is very heavy. Attempting to lift the tongue without  
using the tongue jack could cause strains. Allowing the tongue to fall suddenly and unexpectedly could result  
in crushing injury. Use the tongue jack for lifting the cutter only. Overloading the jack can cause failure with  
possible serious bodily injury or even death.  
Store the unit in an area away from human activity.  
Do not park equipment where it will be exposed to livestock for long periods of time. Damage and livestock  
injury could result.  
Do not permit children to play on or around the stored unit.  
Make sure all parked machines are on a hard, level surface and engage all safety devices.  
If blocking is used, make sure it is solid and secure before leaving area.  
14  
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SAFETY SIGN LOCATIONS  
The types of Safety Sign and locations on the equipment are shown in the illustration below. Good safety requires  
that you familiarize yourself with the various Safety Signs, the type of warning and the area, or particular function  
related to that area, that requires your SAFETY AWARENESS.  
SAFETY SIGN LOCATIONS  
NO. PART NO.  
DESCRIPTION  
1
2
3
4
101101  
101103  
Warning (540 RPM)  
Danger (Keep Away)  
M100 (101157) Warning (Prevent Injury)  
101100 Danger (Rotating Blades)  
REMEMBER: If Safety Signs have been damaged, removed, become illegible or parts replaced without Signs, new  
Safety Signs must be applied. New Safety Signs are available from your authorized distributor or factory.  
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SAFETY SIGN LOCATIONS (continued)  
The types of Safety Sign and locations on the equipment are shown in the illustration below. Good safety requires  
that you familiarize yourself with the various Safety Signs, the type of warning and the area, or particular function  
related to that area, that requires your SAFETY AWARENESS.  
WARNING  
To prevent serious injury or death:  
Si no lee ingles, pida ayuda a alguien que si lo lea para  
que le traduzca las medidas de seguridad.  
• Read and understand Operator’s Manual before using.  
Review annually.  
• Do not permit riders on the tractor or cutter. Never  
carry children on tractor seat.  
• Do not allow children to operate cutter.  
• Operate only with guards installed and in good condition.  
• Keep away from moving parts.  
• Operate only with tractor equipped with ROPS and  
seatbelts.  
• Before mowing, clear debris from mowing area.  
• Do not operate in the raised position.  
• Stop engine, set brake and wait for all moving parts to  
stop before dismounting.  
• Support cutter securely before working beneath unit.  
• Transport with clean reflectors, SMV and working lights  
as required by federal, state, and local laws.  
M100  
WARNING  
540 RPM SPEED  
RANGE ONLY  
HIGHER PTO SPEEDS CAN CAUSE  
PERSONAL INJURY AND  
EQUIPMENT FAILURE  
101101  
REMEMBER: If Safety Signs have been damaged, removed, become illegible or parts replaced without Signs, new  
Safety Signs must be applied. New Safety Signs are available from your authorized distributor or factory.  
16  
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INSTRUCTIONS  
TRACTOR REQUIREMENTS  
AND PREPARATION  
W ARNING!  
When using the unit, a minimum 20% of tractor and  
equipment weight must be on tractor front wheels.  
Without this weight, tractor could tip up, causing  
possible loss of control and possible personal injury  
or death. The weight may be attained with a front  
end loader, front wheel weights, ballast in tires or  
front tractor weights. When attaining a minimum  
20% of tractor and equipment weight on the front  
wheels, you must not exceed the ROPS weight  
certification. Weigh the tractor and equipment. DO  
NOT GUESS OR ESTIMATE!  
The models SDM40-48, SDM40-60 and SDM40-72  
Standard Duty Cutters require a Category I 3-pt. hitch  
tractor of at least 20 horsepower or up to 50 horsepower  
and equipped with a 540 rpm PTO (power takeoff) in  
good working condition.  
It is recommended that only tractors with wide front  
axles be used with this cutter. Tricycle front wheel  
arrangements are inherently unstable and tractor  
roll-over accidents are more likely to occur.  
The tractor also needs lift arm stabilizer bars or sway  
blocks to control side movement of the cutter.  
Check the tractor’s 3-pt. hydraulic lift system. Refer to  
your tractor operator’s manual or dealer for any adjust-  
ments necessary to put the hydraulic system in good  
working order. (I&T shop manuals will list most specifi-  
cations and adjustment instructions - available from most  
farm equipment dealers.)  
Be sure tires and rims are in good condition. Inflate  
tires to the proper recommended air pressure.  
All tractors that are not equipped with a “live” power  
takeoff (PTO) need to be equipped with an over-running  
PTO clutch attachment. A special driveline assembly with  
an over-running clutch incorporated is available as an  
option (see optional equipment list).  
Figure 1. Tractor Stability  
Check the tractor master shield over the PTO stub  
shaft. Make sure it is in good condition and fastened  
securely to the tractor. Purchase a new shield if old  
shield is damaged or missing. (You may have to use a  
tractor salvage yard for replacement parts on older  
tractors.)  
It is recommended that a ROPS (Roll-Over Protection  
Structure) and a seat belt be installed on all tractors.  
Contact your local dealer for a ROPS for your tractor.  
W ARNING!  
A heavy load can cause instability in driving a  
tractor. Make sure the front of the tractor is properly  
counterbalanced with weights. Always drive slowly  
– especially around turns. An unstable tractor could  
steer badly and possibly tip over, causing injury or  
death.  
DANGER!  
CAUTION!  
FOR AGRICULTURAL USE ONLY!  
Be sure your tractor is in good condition. Read all  
the safety precautions and make sure all tractor  
operators are familiar with the safety rules of  
operation.  
When this equipment is operated in populated  
areas or other areas where thrown objects could  
injure persons or property, full chain or rubber  
shielding (which is designed to reduce the possibili-  
ty of thrown objects) must be installed. If this  
machine is not equipped with full chain or rubber  
shielding, operation must be stopped when anyone  
comes within several hundred feet.  
The operator is responsible for the safe operation of this  
cutter. The operator must be properly trained. Operators  
should be familiar with the cutter and tractor and all safe-  
ty practices before starting operation. Read the safety  
rules and safety signs on pages 4-16.  
This standard duty cutter is designed for grass and  
weed mowing and shredding.  
Recommended mowing speed for most conditions is  
from two to five mph.  
SAFETY . . .  
YOU CAN LIVE WITH IT!  
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INSTRUCTIONS (continued)  
In some cases it will be necessary to shorten the PTO  
assembly to match your particular tractor. The following  
procedure should be used:  
1. Raise the tractor 3-pt. hitch so the input shaft of the  
cutter gearbox is in line with the PTO shaft on the trac-  
tor. Shut down tractor, leaving cutter in position of  
shortest distance between shafts. SECURELY  
BLOCK CUTTER IN POSITION.  
Figure 3.  
2. Pull driveline apart. Attach outer (female) section to  
tractor PTO shaft. Pull on driveline section to be sure  
that yoke locks into place.  
3. If driveline must be cut to a shorter length, clamp  
driveline in a well padded vise to prevent damage to  
the shield. Cut off shield where marked. Using cut-off  
section of shield as a guide, cut shaft the same  
amount. (Figure 4.)  
3. Hold driveline sections parallel to each other to  
determine if too long. Each section should end  
approximately 3” (76mm) short of reaching universal  
joint shield on opposite section. If too long, measure  
3” (76mm) back from universal joint shield and mark  
on opposite section (Figure 3). Do this for both sec-  
tions. DO NOT CUT UNTIL STEPS 4 AND 5 ARE  
CHECKED.  
4. Repeat the procedure to the other driveline half.  
Remove all burrs and cuttings.  
5. Apply multi-purpose grease to inside of outer (female)  
driveline section. Assemble driveline and install on  
tractor and cutter. Pull on each driveline section to be  
sure yokes lock into place. Make certain driveline  
shielding is in place and in good condition.  
Figure 4.  
Figure 2.  
NOTE: The use of a PTO over-running clutch or exten-  
sion could require that the PTO driveline be shortened a  
considerable amount. If this is done, the driveline halves  
may separate when the cutter is lowered to the ground or  
when operated on rough ground.  
An optional special driveline that is equipped with an over-  
running clutch is recommended (see optional equipment).  
W ARNING!  
1. Raise and lower the cutter to determine position with  
greatest distance between the PTO shaft and gearbox  
input shaft. Shut tractor off, leaving cutter in position  
of greatest distance between shafts. SECURELY  
BLOCK CUTTER IN POSITION.  
When attaching PTO yoke to tractor PTO shaft, it is  
important that spring-activated locking pin or balls  
operate freely and are seated in groove on PTO shaft.  
A loose shaft could slip off and result in personal  
injury or damage to equipment.  
2. Hold driveline sections parallel to each other and  
check for minimum 6” (15cm) overlap. If driveline  
has been marked for cutting, overlap will be the  
distance between the two marks. If driveline has less  
than minimum overlap, do not use. Contact  
authorized dealer.  
6. Carefully raise and lower the cutter and check to be  
sure the PTO assembly does not jam. If it does, cut  
equal amounts from each half of the PTO assembly.  
18  
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INSTRUCTIONS (continued)  
Adjust the tailwheel and lift arms so the cutter is level.  
Check your lift arm hydraulic controls. Be sure the  
hydraulic 3-pt. hitch control is in the float position and the  
draft control is turned off.  
Adjust lower lift arm(s) to level cutter right to left. Refer  
to tractor operator’s manual for instructions.  
Cutting height is controlled with tractor 3-point arms,  
and rear tailwheel adjustment.  
Then raise the tractor lift very slowly, making sure that  
the front drive shaft shield does not hit the front of the  
cutter. If it does, damage will be done to the drive shaft  
shield and, if interference is bad enough, it WILL also  
damage the drive shaft itself.  
NOTE: This type of damage is NOT covered under  
warranty, as it is totally under the control and the  
responsibility of the operator.  
PTO DRIVELINE INSTALLATION  
Spray WD-40 into the yoke and wipe. This should  
remove some of the paint and make it easier to slide the  
yoke onto the input shaft of the gearbox.  
Remove shearbolt and retaining ring (4) from gearbox  
input shaft (3).  
Grease the input shaft of the gearbox before installing  
the PTO shaft. This reduces the chance of the PTO shaft  
yoke from galling to the input shaft if the shear pin should  
break.  
Use the lift control limiting stop on the tractor control  
lever to limit the upward travel of the lever so the lift can-  
not be raised high enough to cause contact between the  
drive shaft shield and front shielding.  
7. Check the swinging drawbar of the tractor and make  
sure the PTO driveline assembly will not contact. The  
swinging drawbar can be moved forward on some  
tractors or it can be removed.  
Remove rear drive shield (1) from driveline. To remove,  
1
4
turn each plastic clip / turn and then lift out. Then slide  
rear shield so entire joint assembly is exposed. (Refer to  
figure 5.)  
To prevent seal damage, carefully push driveline onto  
gearbox input shaft until it contacts gearbox housing.  
Install retaining ring (4) and then pull driveline ahead.  
If the PTO driveline assembly contacts the swinging  
drawbar, damage will occur to the driveshaft shield and  
possibly the driveshaft itself. (NOT covered under  
warranty.)  
ATTACHMENT  
The cutter is shipped partially assembled. Assembly will  
be easier if components are aligned and loosely assem-  
bled before tightening hardware. Recommended torque  
values for hardware are located on page 26.  
Select a suitable working area. Refer to illustrations,  
accompanying text, parts lists and exploded view  
drawings.  
Complete check lists on page 20 when assembly is  
complete.  
Position cutter flat and cut the nylon straps that are  
holding all loose parts to the cutter.  
Rotate the “A” frame hitch forward and connect lift arms  
and toplink.  
Attach the two linkage lift straps to the cutter deck  
(behind the gearbox) and to the end of the slack link on  
the “A” frame. These bolted connections are moveable  
joints – so tighten nylock nuts only until excess loose-  
ness is gone.  
Most swinging drawbars will have to be moved to a  
forward position or removed. Check the tractor swing-  
ing drawbar for interference with the front of the cutter  
before attempting to lift the cutter with the 3-pt. hitch.  
Tractor lift arm stabilizer bars or sway blocks must be  
used to control side movement of the cutter. DO NOT  
CONNECT THE PTO DRIVELINE AT THIS TIME.  
1. Drive shield  
3. Input driveline shaft half  
4. Retaining ring  
5. Nut  
1
2
6. Shearbolt grade 2 / – 13 NC x 3” long  
7. Gearbox  
Figure 5. Shear Bolt Driveline Installation  
NOTE: A grade 2 bolt must be used for the shear bolt  
to provide gearbox protection.  
Align the holes in the driveline yoke and gearbox input  
shaft and install and tighten shear bolt (6) and nut (5).  
Install rear drive shield to driveline.  
Lubricate rear driveline half and install front driveline  
half.  
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OPERATING INSTRUCTIONS  
always tilt the cutter slightly lower in the front. This tilt  
GEARBOX OIL FILL  
decreases horsepower requirements. When fine shred-  
ding is desired, adjust cutter deck level or slightly lower.  
This will keep the foliage under cutter until thoroughly  
shredded. More power is required for shredding.  
The cutting height is adjustable from 1 - 5 inches. To  
adjust, proceed as follows:  
NOTE: The gearbox is shipped WITHOUT lubricant, so it  
will be necessary to fill is before use. With the gearbox in  
a level position, fill to the side inspection hole with a good  
90 wt. gear lubricant. Check often and add lubricant if  
necessary.  
A. Raise cutter off ground using tractor 3-point lift. Turn  
off tractor engine, disengage PTO, set parking brake,  
and remove key from ignition.  
GENERAL SAFETY  
B. SECURELY BLOCK CUTTER.  
Only qualified people familiar with this manual should  
operate this machine. Operator should wear hard hat,  
safety glasses, and safety shoes. It is recommended  
that tractor be equipped with Roll-Over Protective  
System (ROPS) and a seat belt be used. Before begin-  
ning operation, clear work area of objects that may be  
picked up and thrown. Check for ditches, stumps, holes,  
or other obstacles that could upset tractor or damage  
cutter. Always turn off tractor engine, set parking brake,  
lower cutter to ground and allow cutter blades to come to  
a complete stop before dismounting tractor.  
C. Remove bolt securing tailwheel to adjusting strap.  
D. Adjust tailwheel to desired position. Secure with bolt,  
lockwasher and nut.  
E. Lower cutter to work position.  
F. Adjust tractor 3-point hitch top link so linkage lift straps  
have a small amount of slack to allow cutter deck to  
float during operation.  
PRE-OPERATION CHECKLIST  
(OWNER RESPONSIBILITY)  
Safety is a primary concern in the design and  
manufacture of our products. Unfortunately, our efforts  
to provide safe equipment can be wiped out by a  
single careless act of an operator.  
____ Review and follow safety rules and safety signs on  
pages 4 through 16.  
____ Check that cutter is properly and securely attached  
to tractor.  
It has been said, “The best safety device is an  
informed, careful operator”. We ask you to be that  
kind of an operator.  
____ Make sure driveline spring-activated locking pin or  
locking balls operate freely and are seated firmly in  
tractor PTO spline groove.  
The designed and tested safety of this machine  
depends on it being operated within the limitations as  
explained in this manual. Be familiar with and follow all  
safety rules in the manual, on the cutter and on the  
tractor.  
____ Lubricate all grease fitting locations. Make sure  
PTO shaft slip joint is lubricated.  
____ Check to be sure gear lube runs out the small  
check plug on side of gearbox.  
The safe operation of this machine is the responsibility of  
the owner/operator. The operator should be familiar with  
the cutter and tractor and all safety practices before start-  
ing operation. Read the safety rules on pages 4 thru 14.  
____ Check that all hardware is properly installed.  
____ Check to ensure blades are sharp and secure and  
cutting edge is positioned to lead in a counter-  
clockwise rotation.  
____ Check that all shields and guards are properly  
installed and in good condition.  
CAUTION!  
Do not operate the PTO at other than the rated 540  
RPM. Excessive speeds can cause breakage, thrown  
objects, and potential injury.  
____ Check cutting height, front to rear attitude and top  
link adjustment.  
____ Place tractor PTO and transmission in neutral  
before starting engine.  
ADJUSTING FOR WORK  
____ Set tractor PTO gear select lever for 540 rpm  
operation.  
The cutter should be operated at the highest position  
which will give desired cutting results. This will help pre-  
vent the blades from striking the ground, reducing blade  
wear and undue strain on the machine. For best results  
____ Inspect area to be cut and remove stones,  
branches or other hard objects that might be  
thrown, causing injury or damage.  
20  
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OPERATION INSTRUCTIONS (continued)  
Under some conditions, grass will not rebound enough  
to be cut evenly. In general, lower cutting heights give a  
IMPORTANT  
Vibration tends to loosen bolts during operation. All  
more even cut with less tendency to leave tire tracks.  
However, it is better to cut grass frequently rather that  
too short. Short grass deteriorates rapidly in hot weather  
and invites weed growth during growing seasons. Follow  
local recommendations for the suitable cutting height in  
your area.  
hardware should be checked regularly to maintain  
proper torque. It is a good practice to check cutter  
before each operation to ensure all hardware is  
secure.  
OPERATING TIPS  
OPERATING TECHNIQUE  
SHREDDING  
Power for operating cutter is supplied by tractor PTO.  
Operate PTO only at 540 rpm gear range. Know how to  
stop tractor and cutter quickly in case of an emergency.  
Engage PTO at a low engine rpm to minimize stress on  
the drive system and gearbox. Place tractor in gear and  
proceed forward. Advance tractor throttle to 540 PTO  
RPM. Tractor forward speed should be controlled by  
gear selection, not engine speed. For maximum cutting  
efficiency, forward speed should allow cutter to maintain  
a constant, maximum blade speed. If cutter stalls or  
tractor engine bogs, disengage PTO. Before re-engag-  
ing PTO, position cutter in a cut area and reduce tractor  
throttle to idle. If cutter continuously stalls, select lower  
tractor gear and/or increase cutting height.  
For shredding, it is better to set the cutter lower at the  
rear. How much lower depend on the material to be  
shredded. Determine the best setting for your situation  
by experimenting.  
W ARNING!  
Inspect area to be cut and remove stones,  
branches, or other hard objects that might be  
thrown, causing injury or damage.  
Blade rotation is counterclockwise causing cut material  
to discharge to the left side of cutter forming a windrow.  
To shred and dissipate this windrow, tractor should be  
driven in a counterclockwise direction throwing material  
to the uncut area. The windrowed material will be recut  
on each new pass. Tractor tire tracks are cut more effi-  
ciently when tractor is traveling in a clockwise direction  
especially when cutting height is high. Larger brush  
should be cut in the center of cutter. Always cut up and  
down the face of slopes, never across.  
Extremely tall material should be cut twice. Set cutter at  
a higher cutting height for the first pass. Then cut at  
desired height at 90˚ to the first pass.  
Remember, sharp blades produce cleaner cuts and  
require less power.  
Analyze area to be cut to determine the best procedure.  
Consider height and type of grass and terrain type; hilly,  
level or rough.  
Plan your mowing pattern to travel straight forward  
whenever possible. Mow clockwise around fields when  
necessary to minimize streaking on corners.  
Gearbox protection is provided by a shearbolt. The  
shearbolt will shear when excessive torsional loads are  
encountered.  
Proper ground speed will depend upon the terrain, the  
height, type and density of material to be cut.  
UNEVEN TERRAIN  
Normally, ground speed will range from two to five mph.  
Tall dense material should be cut at a low speed; thin  
medium-height material can be cut at a faster ground  
speed.  
When engaging the PTO, the engine speed should  
always be low. Once the PTO is engaged and ready to  
start cutting, raise the PTO speed to 540 RPM and main-  
tain throughout mowing operation. ALWAYS operate the  
PTO at 540 RPM. This is necessary to maintain proper  
blade speed to obtain a clean cut.  
W ARNING!  
Do not operate on steep slopes.  
Do not stop, start or change directions suddenly on  
slopes.  
Use extreme care and reduce ground speed on  
slopes and rough terrain.  
Watch or hidden hazards on the terrain during  
operation.  
Under certain conditions, tractor tires may roll some  
grass down and prevent it from being cut at the same  
height as the surrounding area. When this occurs,  
reduce your ground speed, but maintain PTO at 540  
rpm. The lower ground speed will permit grass to at least  
partially rebound.  
Pass diagonally through sharp dips and avoid sharp  
drops to prevent “hanging up” tractor and cutter.  
Practice will improve your skills in maneuvering rough  
terrain.  
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OPERATION INSTRUCTIONS (continued)  
OPTIONS  
BLADES  
The blades will last a long time cutting grass, but will  
wear rapidly when contacting the ground. If they are  
clipping into the ground, they will have to be sharpened  
frequently.  
The cutting action of the blade will be much cleaner,  
create less shock loads and require less power if the  
blades are kept quite sharp. That is with a flat or blunt  
edge that is not over 1/32” thick. Putting a knife-sharp  
edge (where both sides come to a sharp point) on the  
blades will not help, as a sharp edge will round off very  
quickly and doing so will only reduce the total life of the  
blades.  
W ARNING!  
When this machine is operated in populated areas,  
along roads, or in other areas where thrown objects  
could injure persons or property, standard equip-  
ment safety chain shielding (which is designed to  
reduce the possibility of thrown objects) must be  
installed.  
Chain guards are not mandatory for agricultural use  
only (i.e. - out in fields where people, livestock, or  
property that could be damaged are not present). If  
this machine is not equipped with chain shielding,  
operation must be stopped when anyone comes  
within several hundred feet.  
TRANSPORTING  
For four (4) foot cutter – Model No. SDM40-48  
order No. 650575 front chain kit (4’)  
Pay particular close attention to the Safety Messages  
regarding cutter transport. Avoid unnecessary injuries  
and equipment damage by exercising cautious, con-  
scientious travel procedures.  
For five (5) foot cutter – Model No. SDM40-60  
order No. 650375 front chain kit (5’)  
Attaching the cutter to the tractor increases the overall  
length of the working unit. Allow additional clearance for  
the cutter to swing when turning.  
For six (6) foot cutter – Model No. SDM40-72  
order No. 650620 front chain kit (6’)  
Raise the cutter as high as possible for transporting,  
while maintaining clearance between the driveline and  
deck of the 3-point lift cutter.  
CAUTION!  
DO NOT OPERATE PTO DURING TRANSPORT.  
All tractors that are not equipped with a “live”  
power takeoff (PTO) need to be equipped with an  
over-running PTO clutch driveline.  
Use of a standard PTO driveline that does not have  
an over-running clutch on these tractors, will allow  
the cutter blade assembly to act as a flywheel. This  
can cause damage to the tractor’s internal PTO drive  
train and can make stopping the tractor’s forward  
travel difficult.  
REMOVING CUTTER FROM  
TRACTOR  
Disengage tractor PTO.  
Disconnect driveline from tractor PTO.  
Collapse driveline as far as possible and store it to pre-  
vent ground contact. Place blocks under cutter side  
skids. Lower cutter onto blocks, disconnect cutter from  
tractor 3-point hitch, and carefully drive tractor away from  
cutter.  
For five (5) foot cutter – Model No. SDM40-60  
order No. 650380 driveline assembly for five (5)  
foot cutter with over-running clutch.  
For six (6) foot cutter – Model No. SDM40-72  
order No. 650625 driveline assembly for six (6)  
foot cutter with over-running clutch.  
OBEY SAFETY  
RULES!!  
CAUTION!  
There are PTO over-running clutch attachments  
available. However, they will increase the length of  
the driveline and may cause the front knuckle joint to  
operate beyond the cover of the tractor master PTO  
shield. This is NOT recommended and a dangerous  
operating condition will be present.  
ALWAYS BE  
CAREFUL!!  
22  
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OWNER SERVICE  
The information in this section is written for operators  
LUBRICATION INFORMATION  
who possess basic mechanical skills. Should you need  
help, your dealer has trained service technicians  
available. For your protection, read and follow all safety  
information in this manual.  
Figure 6 shows the lubrication points. The accompany-  
ing chart gives the frequency of lubrication in operating  
hours, based on normal conditions. Severe or unusual  
conditions may require more frequent lubrication.  
Do not let excess grease collect on or around parts,  
particularly when operating in sandy areas.  
Use an SAE 90W gear lube in gearbox.  
W ARNING!  
Use a lithium grease of NO. 2 consistency with a MOLY  
(molybdenum disulfide) additive for all locations. Be sure  
to clean fittings thoroughly before attaching grease gun.  
When applied according to the lubrication chart, one  
good pump of most guns is sufficient. Do not over  
grease.  
L Lower cutter to ground or block securely, turn  
tractor engine off, remove key and disconnect  
cutter driveline from tractor PTO before perform-  
ing any service or maintenance.  
L Before working underneath, raise 3-pt. hitch to  
highest position and block cutter securely.  
Hydraulic system leakdown and failure of  
mechanical or hydraulic system can cause equip-  
ment to drop.  
L Keep all persons away from operator control area  
while performing adjustments, service or mainte-  
nance.  
ROUTINE MAINTENANCE  
DAILY CHECKS:  
1. Check that all bolts, nuts, and screws are tight.  
Checking the bolts and nuts on the blade beam  
assembly is particularly important.  
Figure 6.  
2. Check daily the level of the gearbox oil and top up to  
the correct level. Check for gearbox oil leaks. It should  
be noted that no warranty claim can be submitted on  
a gearbox that has run dry. It is essential that the  
gearbox is kept correctly filled with gearbox oil.  
LUBRICATION CHART  
REF NO. DESCRIPTION  
FREQUENCY  
1
2
3
4
5
Front U-Joint  
Rear U-Joint  
Gearbox – Fill to proper level Check Daily  
Slip Joint  
Tailwheel  
8 Hrs.  
8 Hrs.  
3. Grease the PTO shaft daily.  
4. Check the wear on the blades. Sharpen them  
routinely with an angle grinder or replace when worn  
down too far. You should keep at least two sets of  
blades, bolts, and nuts as spares for your cutter.  
8 Hrs.  
8 Hrs.  
Daily lubrication of the PTO slip joint is necessary.  
Failure to maintain proper lubrication can result in  
damage to U-joints, gearbox, tractor PTO and/or cutter  
driveline.  
AT THE END OF YOUR CUTTING SEASON:  
1. Drain and change the oil in your gearbox.  
2. Check and replace, where necessary, blades, bolts,  
nuts, or bushings, on the machine.  
3. Clean machine and touch up any rust spots that may  
have appeared.  
ALWAYS OBEY ALL  
SAFETY WARNINGS!!  
4. Replace any safety signs if damaged.  
5. Store cutter in clean, dry location.  
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OWNER SERVICE (continued)  
Insert blade bolt (5) through blade, align key on blade  
BLADE SERVICING  
bolt with keyway in blade beam and push blade bolt  
through blade beam. Insert lockwasher (2) and nut (1)  
through blade access hole in the cutter deck, install on  
bolt (5) and tighten to 350 lbs.-ft.  
BLADE REMOVAL (Figure 7)  
1. Jam nut  
Repeat for opposite blade.  
2. Lockwasher  
3. Blade beam  
4. Blade  
BLADE SHARPENING  
5. Blade bolt  
IMPORTANT  
When sharpening blades, grind each blade the  
same amount to maintain balance. Replace blades in  
pairs. Unbalanced blades will cause excessive vibra-  
tion which can damage gearbox bearings. Vibration  
may also cause structural cracks to cutter.  
Figure 7. Blade Installation  
Sharpen both blades at the same time to maintain bal-  
ance. Follow original sharpening pattern. Do not sharpen  
1
16  
blade to a razor edge, but leave at least a / ” blunt edge.  
Do not sharpen back side of blade.  
Disconnect driveline from tractor PTO.  
It is necessary to gain access to bottom side of cutter  
for blade removal. Raise cutter and block securely.  
Align crossbar (3) with blade access hole in the cutter  
deck. Remove nut (1) and lockwasher (2) then carefully  
drive bolt (5) out of crossbar.  
SHEAR BOLT REPLACEMENT  
IMPORTANT  
1
2
Always use approved / ” NC x 3” grade 2 shear bolt  
as a replacement part. Using a hardened bolt or  
shear pin may result in damage to driveline or  
gearbox.  
IMPORTANT  
If blade bolt (5) is seized in blade beam and extreme  
force will be required to remove it, support blade  
beam from below to prevent gearbox damage.  
Remove driveline shield bell. (Refer to page 19 for  
instructions.)  
Make sure the input shaft of the gearbox is greased.  
This reduces the chance of the PTO shaft yoke from  
galling to the input gearbox shaft if the shear bolt should  
break.  
Rotate driveline to align holes in yoke and shaft. Install  
shear bolt and secure with locknut. Replace driveline  
shield bell.  
Rotate blade beam (3) and repeat for opposite blade.  
Always replace or sharpen both blades at the same  
time.  
Inspect blade bolt (5) for nicks or gouges; replace if any  
are found. Insert bolt through blade. Blade should swivel  
on bolt. Determine cause if it does not and correct.  
Align blade beam (3) with blade access hole in the cut-  
ter frame. Apply a liberal coating of Never Seez® or  
equivalent to blade bolt and blade beam hole. Make sure  
blade is offset away from cutter.  
W ARNING!  
FAILURE TO USE CORRECT SIZE SHEAR BOLT  
MAY CAUSE PERSONAL INJURY OR DEATH.  
IMPORTANT  
Blade beam rotation is counter-clockwise when  
looking down on cutter. Be sure to install blade cut-  
ting edge to lead in counter-clockwise rotation.  
W ARNING!  
FAILURE TO INSTALL RETAINING CLIP WILL  
ALLOW DRIVELINE TO SWING FREELY IF BOLT IS  
SHEARED CAUSING POSSIBLE INJURY OR DEATH.  
Never Seez is a registered trademark of the  
Never Seez Corporation.  
24  
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OWNER SERVICE (continued)  
REPAIR OF OPTIONAL  
CHAIN SHIELDING  
BLADE BEAM & GEARBOX  
INSTALLATION  
Inspect chain shielding each day of operation and  
replace any broken or missing chains as required.  
A. Raise cutter using tractor 3-point lift. Turn off tractor  
engine.  
B. BLOCK CUTTER SECURELY INTO POSITION.  
BLADE BEAM & GEARBOX  
REMOVAL  
W ARNING!  
DO NOT GET UNDER CUTTER UNLESS IT IS  
SECURELY BLOCKED IN POSITION. ACCIDENTAL  
FALL COULD CAUSE SERIOUS INJURY OR DEATH.  
A. Raise cutter using tractor 3-point lift. Turn off tractor  
engine.  
B. BLOCK CUTTER SECURELY INTO POSITION.  
C. Attach gearbox to cutter deck using bolts and nuts.  
D. Install blade holder onto gearbox securing with  
castellated nut and flat washer. Torque nut to 350  
ft./lbs. Wear heavy work gloves to protect hands from  
sharp edges.  
W ARNING!  
DO NOT GET UNDER CUTTER UNLESS IT IS  
SECURELY BLOCKED IN POSITION. ACCIDENTAL  
FALL COULD CAUSE SERIOUS INJURY OR DEATH.  
E. Install cotter pin to retain nut. It may be necessary to  
slightly loosen nut to install cotter pin.  
F. Slide driveline yoke onto gearbox input shaft. Install  
retaining clip and shear bolt.  
C. Remove cotter pin and blade holder retaining nut.  
Wear heavy work gloves to protect hands from sharp  
edges.  
D. Grasp blade holder and pull off shaft. If necessary,  
align blade bar with access hole in top of deck and  
drive off with hammer and pipe. Care should be taken  
not to damage threads on blade bolt.  
W ARNING!  
FAILURE TO INSTALL RETAINING CLIP WILL  
ALLOW DRIVELINE TO SWING FREELY IF BOLT IS  
SHEARED CAUSING POSSIBLE INJURY OR DEATH.  
E. Press all three tabs and slide yoke shield back.  
F. Remove shear bolt and retaining clip. Slide yoke off  
gearbox input shaft.  
G.Lock driveline yoke shield securely into place.  
H. Fill gearbox with oil to proper level.  
G.Remove nuts securing gearbox to deck. Remove  
gearbox.  
U Keep children away from danger all day, every day.  
U Equip tractors with roll-over protection (ROPS) and keep all machinery  
guards in place.  
U Please work, drive, play, and live each day with care and concern for your  
safety and that of your family and fellow citizens.  
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PROPER TORQUE FOR FASTENERS  
26  
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TROUBLESHOOTING GUIDE  
PROBLEM  
POSSIBLE CAUSE  
POSSIBLE REMEDY  
Leaves a streak of uncut  
or partially cut grass.  
1. Cutter not level side to side.  
2. Blades dull or bent.  
Level 3 pt. hitch linkage on tractor.  
Sharpen or replace blades.  
Use correct PTO speed.  
3. Carrier RPM too low.  
4. Field conditions are so wet that  
the tractor tire is pushing grass  
into mud.  
Too wet to mow. Stop operation  
and wait until it is drier.  
5. Ground speed too fast.  
6. Blades locked back.  
Reduce ground speed by shifting  
to a lower gear.  
Free blades.  
7. Blades riding up due to blade  
bolt wear or loose bolts.  
Replace blade bolts.  
8. Grass is down from previous  
weather conditions.  
Mow in only one direction.  
Clean cutter.  
9. Possible build up of material  
under cutter.  
10. Weed and grass stems are pushed  
down by tractor tires and do not  
Mow again in opposite direction.  
rebound up so they can be cut (this  
can happen when weed/grass is high).  
Mow back and forth with enough  
overlap to mow tire track of previous  
cut again.  
Offset cutter to left 4-6” by adjust-  
ing stabilizer bars. Then mow in  
counter clockwise direction  
(rotation direction of blades will  
help cut stems pushed forward).  
Grass cut lower in center  
of swath than at edge.  
Height of cutter lower at rear  
or front.  
Adjust cutter height and attitude so  
that cutter rear and front are within  
1
2
/ ” of same height. See instructions.  
Material discharges from  
cutter unevenly; bunches  
of material along swath.  
1. Material too high and too much  
material.  
Reduce ground speed but maintain  
540 rpm at tractor PTO, or make  
two passes over material. Raise  
cutter for the first pass and lower  
to desired height for the second and  
cut a 90˚ to first pass. Raise rear to  
cutter high enough to permit mater-  
ial to discharge, but not so high that  
conditions listed above occur.  
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TROUBLESHOOTING GUIDE  
PROBLEM  
POSSIBLE CAUSE  
POSSIBLE REMEDY  
Material discharges from  
cutter unevenly; bunches  
of material along swath.  
(Continued)  
2. Grass wet.  
Allow grass to dry before mowing.  
Slow ground speed of tractor but  
keep engine running at full PTO  
rpm. Cutting lower will help.  
3. Rear of cutter too low, trapping  
material under cutter.  
Adjust cutter height and attitude.  
(See instructions.)  
Gearbox overheating.  
1. Low on lubricant.  
Fill to proper level.  
2. Improper type lubricant.  
Replace with proper lubricant.  
3. Excessive trash build-up around gearbox. Remove trash.  
Blade is scalping ground.  
1. Cutter too low.  
Raise cutter - reset tailwheel and  
3-pt. control stop.  
2. Field is ridged.  
3. Field is too wet.  
Cut field at a different angle.  
Stop and wait until it is drier.  
Cutter will not cut.  
(Shear bolt drive only)  
1. Shear bolt sheared.  
Install new shear bolt.  
Engage PTO.  
2. Tractor PTO not engaged.  
3. Tractor PTO clutch slipping.  
Rebuild/replace clutch.  
Cutter moves from side  
to side when cutting.  
Loose tractor sway chains or bars,  
or sway blocks improperly installed.  
Adjust sway chains, bars, or  
sway blocks.  
PTO contacts cutter front  
frame when raised.  
Raising cutter too high or incorrect  
adjustment of tractor top link.  
Adjust top link or tractor lift stops.  
(See attachment instructions.)  
Blade bolts come  
loose.  
1. Bolts not tightened.  
Tighten bolts to 350 ft./lb.  
Replace blade carrier.  
2. Bolt hole elongated or oversized.  
3. Blade bolt threads are worn or  
damaged.  
Replace blade bolt, lockwasher,  
and nut.  
28  
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TROUBLESHOOTING GUIDE  
PROBLEM  
POSSIBLE CAUSE  
POSSIBLE REMEDY  
Blade wears too fast.  
1. Cutting in sandy conditions.  
2. Cutting in rocky conditions.  
3. Blades hitting ground.  
Increase cutting height.  
Increase cutting height.  
Increase cutting height.  
Cutter seems to require  
excessive power.  
1. Advancing into grass or brush  
too rapidly.  
Reduce forward travel speed.  
2. Hitting ground.  
Raise cutter and reset skids.  
Sharpen or replace blades.  
Use larger horsepower tractor.  
3. Worn or dull blades.  
4. Tractor not large enough.  
5. Grass too tall and heavy.  
Make two passes. Raise cutter for  
first pass and lower for next pass.  
Excessive vibration.  
1. Check gearbox bolts.  
Tighten if loose.  
Tighten if loose.  
2. Check for loose nuts on  
bladeholder and blades.  
3. Check for bent output shaft. If  
shaft is bent, oil will normally  
leak from bottom seal.  
Replace shaft if bent.  
4. Check to see if blades are  
free-swinging.  
Free blades so they swing.  
5. Check for even wear on each  
blade tip. Were both blades changed  
at the same time?  
Weigh blades. Weight should be  
within 1 oz. Always replace both  
blades  
6. Blade broken.  
Replace blades, in sets.  
Replace blade beam.  
7. Blade beam bent.  
8. New blade or bolts matched  
with worn blade or bolts.  
Replace blades or bolts in sets.  
9. Drivelines not phased correctly.  
Implement and tractor yokes must  
be in line.  
Replace driveline.  
10. Wire or rope wrapped around  
blade beam.  
Remove wire or rope.  
11. Blades worn and are out of  
balance.  
Replace blades, in sets.  
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TROUBLESHOOTING GUIDE  
PROBLEM  
POSSIBLE CAUSE  
POSSIBLE REMEDY  
Gearbox noisy.  
1. Rough gears.  
Run in or change gears.  
Replace bearing.  
2. Worn bearings.  
3. Low oil in gearbox.  
4. Improper gearbox lubricant.  
Check level and add oil.  
Replace with proper lubricant.  
Gearbox leaking.  
1. Damaged oil seal.  
2. Bent shaft.  
Replace seal.  
Replace oil seal and shaft.  
Replace or repair shaft.  
Replace seal.  
3. Shaft rough in oil seal area.  
4. Oil seal installed wrong.  
5. Oil seal not sealing in the  
housing.  
Replace seal or use a sealant  
on outside diameter of seal.  
6. Oil level too high.  
7. Hole in gearbox.  
8. Gasket damaged.  
9. Bolts loose.  
Drain oil to proper level.  
Replace gearbox.  
Replace gasket.  
Tighten bolts.  
Excessive wear of  
tailwheel tire.  
1. Tire not turning properly.  
Check wheel assembly for proper  
lubrication. Axle bolt could be too  
tight.  
2. Tailwheel not castering properly.  
Check tailwheel yoke assembly for  
proper lubrication or for mechanical  
binding.  
Front hitch “A” frame  
bending sideways.  
1. Operator turning sharply hitting  
objects with tailwheel frame or  
cutter deck.  
Drive carefully and plan turns to  
avoid hitting buildings, posts, trees,  
etc.  
2. Tailwheel not castering properly.  
Check tailwheel yoke (see above  
under tire wear).  
3. Cutter is being operated to low  
and cutter deck is contacting  
ground during turns.  
A. Raise cutter (especially on  
rough ground).  
B. Set stop on hitch controls lever so  
hitch lift arms do not drop cutter  
on ground.  
4. Tractor 3 pt. hitch is leaking down  
and cutter deck is contacting  
ground.  
A. Repair tractor hitch hydraulic system.  
B. Use limit chains to keep lift arms  
from going lower than set limit.  
30  
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LIMITED WARRANTY  
✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯  
Worksaver warrants to the original purchaser of any new Rotary Cutter (Models SDM40-48, SDM40-60 and  
SDM40-72), that the equipment be free from defects in material and workmanship for a period of one (1) year  
for non-commercial, state, and municipalities’ use ninety (90) days for commercial use from date of retail sale.  
Replacement or repair parts installed in the equipment covered by this warranty are warranted for ninety (90)  
days from the date of purchase of such part or to the expiration of the applicable new equipment warranty  
period, whichever occurs later.  
Such parts shall be provided at no cost to the user during regular working hours. Worksaver reserves the right  
to inspect any equipment or parts which are claimed to have been defective in material or workmanship.  
DISCLAIMER OF IMPLIED WARRANTIES & CONSEQUENTIAL DAMAGES  
Worksaver’s obligation under this warranty, to the extent allowed by law, is in lieu of all warranties, implied or  
expressed, including implied warranties of merchantability and fitness for a particular purpose and any liability  
for incidental and consequential damages with respect to the sale or use of the items warranted. Such  
incidental and consequential damages shall include but not be limited to: transportation charges other than  
normal freight charges; cost of installation other than cost approved by Worksaver; duty; taxes; charges for  
normal service or adjustments; loss of crops or any other loss of income; rental of substitute equipment,  
expenses due to loss, damage, detention or delay in the delivery of equipment or parts resulting from acts  
beyond the control of Worksaver.  
THIS WARRANTY SHALL NOT APPLY:  
1. To vendor items which carry their own warranties, such as hydraulic cylinders, tires, and tubes.  
2. If the unit has been subjected to misapplication, abuse, misuse, negligence, fire or other accident.  
3. If parts not made or supplied by Worksaver have been used in connection with the unit, if, in sole judge-  
ment of Worksaver such use affects its performance, stability, or reliability.  
4. If the unit has been altered or repaired outside of an authorized Worksaver dealership in a manner which,  
in the sole judgement of Worksaver affects its performance, stability or reliability.  
5. To normal maintenance service and normal replacement items such as gearbox lubricant, hydraulic fluid,  
worn blades, or to normal deterioration of such things as belts and exterior finish, due to use or exposure.  
6. To expendable or wear items such as teeth, chains, sprockets, belts, springs and other items that in the  
company’s sole judgement is a wear item.  
NO EMPLOYEE OR REPRESENTATIVE OF WORKSAVER IS AUTHORIZED TO CHANGE THIS  
WARRANTY IN ANY WAY OR GRANT ANY OTHER WARRANTY UNLESS SUCH CHANGE IS MADE IN  
WRITING AND SIGNED BY WORKSAVER’S SERVICE MANAGER, POST OFFICE BOX 100, LITCHFIELD,  
ILLINOIS 62056-0100.  
✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯  
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PTO SHAFT (SHEAR BOLT PROTECTED)  
PARTS VIEW & PARTS LIST  
REF. WORKSAVER  
E & G  
NO.  
NO.  
PART NO.  
PART NO.  
DESCRIPTION  
REQ'D.  
650565  
650460  
650465  
650768  
650769  
650770  
650771  
650712  
650772  
650773  
650774  
650775  
650719  
650776  
650777  
650778  
650779  
650781  
650782  
650726  
650727  
07.422.117.10  
07.422.090.10  
07.422.091.10  
141.024.001  
Complete Driveline Assembly (SDM40-48)  
Complete Driveline Assembly (SDM40-60)  
Complete Driveline Assembly (SDM40-72)  
Yoke w/ Push Pin (Tractor End)  
1
1
1
1
2
1
1
6
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
180.014.130  
Cross Journal Set  
30  
31  
33  
37  
40  
151.014.035  
Yoke, Smooth Bore (Imp. End)  
180.013.012  
Guard Retaining Collar for Outer Tube  
Bolt, Plastic  
190.000.019  
180.013.011  
Guard Retaining Collar for Inner Tube  
Complete Guard w/ Instruction Manual (SDM40-48)  
Complete Guard w/ Instruction Manual (SDM40-60)  
142.240.004.7420  
142.240.059.7420  
142.240.060.7420  
166.026.004  
Complete Guard w/ Instruction Manual (SDM40-72)  
3
8
51  
96  
Push Pin Set 1 / ”  
123.240.685.10  
123.240.747.10  
123.240.748.10  
123.240.309.10  
123.240.509.10  
123.240.465.10  
190.000.098  
Half Female Shaft w/ Guarding (SDM40-48) (Tractor End)  
Half Female Shaft w/ Guarding (SDM40-60) (Tractor End)  
Half Female Shaft w/ Guarding (SDM40-72) (Tractor End)  
Half Male Shaft w/ Guarding (SDM40-48) (Imp. End)  
Half Male Shaft w/ Guarding (SDM40-60) (Imp. End)  
Half Male Shaft w/ Guarding (SDM40-72) (Imp. End)  
“DANGER” Label for Outer Tube  
97  
98  
99  
190.000.099  
“DANGER” Label for Outer Guard Tube  
32  
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SDM40-60 PARTS VIEW  
SDM40-48 (4’ CUTTER) PARTS LIST  
REF.  
NO.  
PART  
NO.  
NO.  
REQ'D.  
DESCRIPTION  
Deck Weldment, SDM40-48  
Gearbox - Comer 135.802 (SDM40-48)  
Blade, Cutter SDM40-48  
Linkage Lift Strap SDM40-48  
PTO Assembly, SDM40-48  
1
2
6
12  
33  
650561  
650435  
650570  
650569  
650565  
1
1
2
2
1
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SDM40-60 (5’ CUTTER) PARTS LIST  
and parts common to all models  
REF.  
NO.  
PART  
NO.  
NO.  
REQ'D.  
DESCRIPTION  
Deck Weldment, SDM40-60  
Gearbox - Comer 135.800  
1
2
3
4
5
6
7
8
9
650351  
650440  
2503175  
2500083  
650395  
650425  
650426  
650427  
650428  
650378  
650379  
650382  
650383  
650384  
2503258  
2500037  
590108  
2503066  
2503154  
2503152  
2500041  
650416  
650412  
650480  
650386  
2504179  
2503256  
2500002  
2502001  
650387  
2502007  
2500013  
650460  
2503012  
2502002  
2500003  
2504201  
650451  
650468  
650452  
2504049  
101101  
101100  
101103  
101157  
1
1
4
4
1
2
2
2
2
2
1
2
2
1
2
2
2
1
6
1
4
1
1
1
1
1
1
1
1
1
4
4
1
1
1
1
1
1
1
1
1
1
1
1
1
5
3
8
4
Bolt, Hex / ” - 11 NC x 1 / ”  
5
8
Nut, Hex Vibration Proof / ” - 11 NC  
Blade Holder Weldment  
Blade, Cutter SDM40-60/MDM70-60  
1
8
Blade Bolt, 1 / ”  
1
8
Lock, Washer, 1 / ” HD  
1
8
Nut, Hex Jam, 1 / ” - 12 UNF Gr. 8  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
Sidebar, Toplink “A”  
Crossbar, Toplink “A”  
Linkage Lift Strap  
Tie Link, Toplink “A”  
Spacer  
3
4
Bolt, Hex / ” - 10 x 2.25 Gr. 5  
Nut, Hex Nylock / ” - 10 NC  
3
4
AK-578 Draw Pin  
5
8
Bolt, Hex Head / ” - 11 NC x 4”  
5
1
8
2
Bolt, Hex / ” - 11 NC x 1 / ”  
5
8
Bolt, Hex Head / ” - 11 NC x 2”  
Nut, Hex Nylock / ” - 11 NC  
5
8
A-Frame Weldment Tail Wheel  
Yoke Weldment  
Wheel Assembly - SDM40-60/72 Cutters  
Spindle Tube  
1
2
Roll Pin / ” x 2”  
3
1
4
2
Bolt, / ” - 10 NC x 7 / ” HH Gr. 5  
Nut, Hex / ” - 10 NC  
Washer, Springlock / ”  
3
4
3
4
Bar, Tail Wheel Adj.  
5
8
Washer, Springlock / ”  
5
8
Nut, Hex / ” - 11 NC  
PTO Assembly, SDM40-60  
1
2
Bolt, Hex / ” - 13 NC x 3” Grade 2  
1
2
Washer, Springlock / ”  
1
2
Nut, Hex / ” - 13 NC  
3
8
Snap Ring 1 / ” Dia. SH-137  
Castle Nut M24 x 2  
Cotter Pin 5 x 50  
Bolt Washer 25 x 44 x 4  
5
16  
Drive Zerk / ”  
Safety Sign - Warning (540 RPM)  
Safety Sign - Danger (Rotating Blades)  
Safety Sign - Danger (Keep Away) SW101  
Safety Sign - Warning (Prevent Serious Injury) M100  
SDM40-72 (6’ CUTTER) PARTS LIST  
1
6
12  
33  
650601  
Deck Weldment, SDM40-72  
Blade, Cutter SDM40-72/MDM70-72  
Linkage Lift Strap SDM40-72  
PTO Assembly, SDM40-72  
1
2
2
1
650430  
650632  
650465  
34  
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COMER GEARBOX - LF-135.802  
PARTS VIEW  
(4’ CUTTER)  
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COMER GEARBOX - LF 135.802  
PARTS LIST  
(4’ CUTTER)  
REF.  
NO.  
WORKSAVER  
PART NO.  
COMER  
PART NO.  
NO.  
REQ'D.  
DESCRIPTION  
Gear Z23 M5  
1
2
650553  
650442  
650554  
650555  
650556  
650446  
650447  
650448  
171017  
650449  
650451  
650452  
650453  
650557  
650456  
650457  
650458  
650459  
650558  
650559  
650463  
171007  
650454  
171014  
709059  
650468  
0.135.5000.00  
0.135.0301.00  
0.135.2000.00  
0.135.6001.00  
0.135.7101.00  
0.135.1301.00  
1.135.7100.00  
8.0.1.00034  
8.0.1.00870  
8.0.1.00871  
8.2.2.00515  
8.3.2.00409  
8.4.1.00993  
8.5.1.00029  
8.5.2.00030  
8.5.3.00955  
8.5.3.01057  
8.6.6.00201  
8.7.1.01171  
8.7.3.01172  
8.7.6.01058  
0.244.7500.00  
0.100.7500.00  
0.259.7500.00  
8.5.1.00680  
8.4.7.00516  
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
Casing  
3
Shaft  
4
Pinion Shaft Z12 M5  
Spacer  
5
6
Cover  
7
Protective Washer  
Bearing 6205  
8
9
Bearing 6207  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
Bearing 6208  
Castle Nut M24 x 2 PR80 B  
Bolt Washer 25 x 44 x 4  
Parallel Key B 10 x 8 x 30  
Snap Ring 40 UNI 7435  
Snap Ring 80 UNI 7437  
Snap Ring SB 81  
Snap Ring SB 125  
3
8
Plug / ” Gas  
Double Lip Seal 40 x 80 x 12  
Double Lip Seal 35 x 52 x 7  
O-Ring OR-4462  
Shim 51.5  
Shim 35.3  
Shim 48.0  
Snap Ring 40 UNI 7436  
Cotter Pin B5 x 50  
36  
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COMER GEARBOX PARTS VIEW  
(5’ & 6’ CUTTERS)  
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COMER GEARBOX - LF 135.800  
PARTS LIST  
(5’ & 6’ CUTTERS)  
REF.  
NO.  
WORKSAVER  
PART NO.  
COMER  
PART NO.  
NO.  
REQ'D.  
DESCRIPTION  
1
2
650441  
650442  
650443  
650444  
650445  
650446  
650447  
650448  
171017  
650449  
650451  
650452  
650453  
650454  
650456  
650457  
650458  
650459  
650461  
650462  
650463  
171007  
171014  
650464  
709059  
650466  
650468  
0.131.5000.00  
0.135.0301.00  
0.135.2004.00  
0.135.6201.00  
0.135.7105.00  
0.135.1301.00  
1.135.7100.00  
8.0.1.00034  
8.0.1.00870  
8.0.1.00871  
8.2.2.00515  
8.3.2.00409  
8.4.1.00993  
0.100.7500.00  
8.5.2.00030  
8.5.3.00955  
8.5.3.01057  
8.6.6.00201  
8.7.1.00748  
8.7.3.00028  
8.7.6.01058  
0.224.7500.00  
0.259.7500.00  
0.267.7500.00  
8.5.1.00680  
0.124.7135.00  
8.4.7.00516  
Crown Wheel Z22 M5  
Casing  
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
3
Shaft  
4
Pinion Z15 M5  
Spacer  
5
6
Cover  
7
Protective Washer  
Bearing 6205  
8
9
Bearing 6207  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
Bearing 6208  
Castle Nut M24 x 2 PR80 B  
Bolt Washer 25 x 44 x 4  
Parallel Key B 10 x 8 x 30  
Shim 35.3  
Snap Ring 80 UNI 7437  
Snap Ring SB 81  
Snap Ring SB 125  
3
8
Plug / ” Gas  
Double Lip Seal 40 x 80 x 12  
Oil Seal 35 x 52 x 7  
O-Ring OR-4462  
Shim 51.5  
Shim 48.0  
Shim 79.9  
Snap Ring 40 UNI 7436  
Spacer (China)  
Cotter Pin B5 x 50  
38  
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SAFETY PRECAUTIONS  
MOST ACCIDENTS OCCUR BECAUSE OF NEGLECT OR CARELESSNESS.  
AVOID NEEDLESS ACCIDENTS BY FOLLOWING ALL OF THE SAFETY PRECAUTIONS LISTED BELOW.  
• Machinery should be operated only by those who  
are responsible and are authorized to do so.  
• Stop the engine, lower all equipment, lock the  
brakes, and remove the ignition key before dis-  
mounting from the tractor.  
• Never stand between tractor and implement while  
tractor is being backed to hitch.  
• Loose fitting clothing should not be worn, to avoid  
catching on various parts.  
• Detach implement in area where children normally  
do not play.  
• When performing adjustments or maintenance on  
an implement, first lower it to the ground or block it  
securely at a workable height.  
• Only a qualified operator should be permitted on  
tractor when in operation; no riders allowed.  
• Make certain everyone is in the clear before starting  
tractor or raising or lowering equipment.  
• Operate the tractor and implement only while  
seated in the driver’s seat.  
• A heavy load can cause instability of the tractor.  
Use extreme care during road travel. Slow down on  
turns and watch out for bumps. Tractor may need  
front counter-weights to counter-balance the weight  
of the implement.  
• Reduce speed on hillsides or curves so there is no  
danger of tipping.  
• Avoid driving too close to the edge of ditches or  
creeks.  
• Do not transport implement on public roads without  
reflectors and slow moving vehicle emblem in  
daylight and with approved warning lights at night  
and other periods of poor visibility.  
• Due to the width of some implements, use extra  
caution on highways, farm roads, and when  
approaching gates.  
• Always be sure the implement is in the proper  
position for transport.  
• Keep alert and watch the front as well as the rear  
when working with the implement.  
• Reduce speed when transporting mounted  
implements to avoid bouncing and momentary loss  
of steering control.  
Equip tractors with roll-over protection  
(ROPS) and keep all machinery guards in  
place.  
OWNER’S/  
OPERATOR’S  
MANUAL  
Keep children away from danger all day,  
every day . . .  
MODEL NO’s  
SDM40-48  
SDM40-60  
SDM40-72  
Please work, drive, play and live each day  
with care and concern for your safety and  
that of your family and fellow citizens.  
WHEN ORDERING  
REPAIR PARTS,  
ALWAYS GIVE  
THE FOLLOWING  
INFORMATION:  
MAKE EVERY DAY  
A HOLIDAY  
FROM ACCIDENTS  
1. PART NUMBER  
2. PART DESCRIPTION  
3. MODEL NUMBER  
4. NAME OF ITEM  
OCTOBER 2001  
WS-RM002-OG  
WORKSAVER, INC.  
P.O. BOX 100 LITCHFIELD, IL 62056-0100 (217) 324-5973  
WEB: http://www.worksaver.com E-MAIL: [email protected]  
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