Bush Hog Satellite Radio GHM 1800 User Manual

®
BUSH HOG  
GEARDRIVE  
HAY MOWERS  
SERIES GHM 700, GHM 800, GHM 900  
GHM 1800 & GHM 1900  
Operator’s Manual  
ASSEMBLY OPERATION MAINTENANCE  
1297  
$4.00  
Part No. 99707  
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GHM HAY MOWER  
TABLE OF CONTENTS  
SECTION/PARA  
PAGE  
SECTION/PARA  
PAGE  
IV.MAINTENANCE.........................................12  
4-1 Maintenance Check List ......................12  
4-2 Lubrication ...........................................13  
4-3 Blade Replacement .............................14  
4-4 Belt Adjustment....................................14  
4-5 Belt Replacement ................................14  
4-6 Spindle Housing Removal and  
Reassembly .........................................14  
4-7 Cutter Bar Removal .............................15  
4-8 Cutter Bar Installation ..........................16  
4-9 Troubleshooting...................................17  
V. ASSEMBLY................................................19  
Safety Decals.............................................21  
Torque Specifications.................................23  
Warranty.......................................................3  
Dealer Preparation Check List.....................4  
Safety Precautions.......................................5  
Federal Laws and Regulations ....................6  
I. INTRODUCTION & DESCRIPTION ............7  
1-1 Introduction............................................7  
1-2 Description.............................................7  
II. PREPARATION FOR USE...........................8  
III.OPERATING INSTRUCTIONS..................10  
3-1 General Safety.....................................10  
3-2 Cutting Height......................................10  
3-3 Transporting.........................................10  
3-4 Breakaway Latch .................................10  
3-5 Operation .............................................11  
3-6 Swath Board .......................................11  
3-7 Cutter Bar Helper Spring  
Adjustment...........................................12  
3-8 Unhitching From Tractor and Storage........12  
RETAIL CUSTOMER’S RESPONSIBILITY  
UNDER THE BUSH HOG WARRANTY  
It is the Retail Customer and/or Operator’s responsibility to read the Operator’s Manual, to  
operate, lubricate, maintain and store the product in accordance with all instructions and  
safety procedures. Failure of the operator to read the Operator’s Manual is a misuse of this  
equipment.  
It is the Retail Customer and/or Operator’s responsibility to inspect the product and to have  
any part(s) repaired or replaced when continued operation would cause damage or exces-  
sive wear to other parts or cause a safety hazard.  
It is the Retail Customer’s responsibility to deliver the product to the authorized Bush Hog  
Dealer, from whom he purchased it, for service or replacement of defective parts which are  
covered by warranty. Repairs to be submitted for warranty consideration must be made with-  
in forty-five (45) days of failure.  
It is the Retail Customer’s responsibility for any cost incurred by the Dealer for traveling to or  
hauling of the product for the purpose of performing a warranty obligation or inspection.  
UNDERSTAND SIGNAL WORDS  
DANGER: Indicates an imminently  
hazardous situation which, if not avoid-  
ed, will result in death or serious injury.  
This signal word is to be limited to the  
most extreme situations.  
WARNING: Indicates a potentially  
hazardous situation which, if not  
avoided, could result in death or  
serious injury.  
CAUTION: Indicates a potentially haz-  
ardous situation which, if not avoided,  
may result in minor or moderate injury. It  
may also be used to alert against  
unsafe practices.  
2
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®
BUSH HOG  
LIMITED WARRANTY  
✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯  
Bush Hog warrants to the original purchaser of any new Bush Hog equipment, purchased from an  
authorized Bush Hog dealer, 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 and ninety (90) days for commercial use from  
date of retail sale. The obligation of Bush Hog to the purchaser under this warranty is limited to the repair or  
replacement of defective parts.  
Replacement or repair parts installed in the equipment covered by this limited warranty are warranted  
for ninety (90) days from the date of purchase of such part or to the expiration of the applicable new equip-  
ment warranty period, whichever occurs later. Warranted parts shall be provided at no cost to the user at an  
authorized Bush Hog dealer during regular working hours. Bush Hog reserves the right to inspect any equip-  
ment or parts which are claimed to have been defective in material or workmanship.  
DISCLAIMER OF IMPLIED WARRANTIES & CONSEQUENTIAL DAMAGES  
Bush Hog’s obligation under this limited warranty, to the extent allowed by law, is in lieu of all war-  
ranties, 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 Bush Hog; duty; taxes; charges for normal service or adjustment; 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 Bush Hog.  
THIS LIMITED WARRANTY SHALL NOT APPLY:  
1. To vendor items which carry their own warranties, such as engines, 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 Bush Hog have been used in connection with the unit, if, in the sole judge-  
ment of Bush Hog such use affects its performance, stability or reliability.  
4. If the unit has been altered or repaired outside of an authorized Bush Hog dealership in a manner  
which, in the sole judgement of Bush Hog, 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 any other items that in the  
company’s sole judgement is a wear item.  
NO EMPLOYEE OR REPRESENTATIVE OF BUSH HOG IS AUTHORIZED TO CHANGE THIS LIM-  
ITED WARRANTY IN ANY WAY OR GRANT ANY OTHER WARRANTY UNLESS SUCH CHANGE IS MADE  
IN WRITING AND SIGNED BY BUSH HOG’S SERVICE MANAGER, POST OFFICE BOX 1039, SELMA,  
ALABAMA 36702-1039.  
✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯  
Record the model number, serial number and date  
purchased. This information will be helpful to your  
dealer if parts or service are required.  
MODEL NUMBER  
MAKE CERTAIN THE WARRANTY REGISTRATION  
CARD HAS BEEN FILED WITH BUSH HOG/  
SERIAL NUMBER  
SELMA, ALABAMA  
DATE OF RETAIL SALE  
3
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DEALER PREPARATION CHECK LIST  
GHM HAY MOWER  
BEFORE DELIVERING MACHINE — The following check list should be completed.  
Use the Operator’s Manual as a guide.  
1. Assembly completed.  
2. Gearbox filled with oil.  
3. All fittings lubricated.  
4. All shields in place and in good condition.  
5. All fasteners torqued to specifications given in Torque Chart.  
6. All decals in place and readable. (See decal page.)  
7. Overall condition good (i.e. paint, welds)  
8. Operators manual has been delivered to owner and he has been instructed  
on the safe and proper use of the mower.  
Dealer’s Signature  
Purchaser’s Signature  
THIS CHECKLIST TO REMAIN IN OWNER’S MANUAL  
It is the responsibility of the dealer to complete the procedures listed  
above before delivery of this implement to the customer.  
4
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IMPORTANT SAFETY PRECAUTIONS  
This symbol is used to call attention to safe-  
ty precautions that should be followed by  
the operator to avoid accidents. When you  
see this symbol, carefully read the message  
that follows and heed its advice. Failure to  
comply with safety precautions could result  
in serious bodily injury.  
In addition to the design and configuration of equipment, hazard control and accident prevention are depen-  
dent upon the awareness, concern, prudence and proper training of personnel in the operation, transport,  
maintenance and storage of equipment. Lack of attention to safety can result in accident, personal injury,  
reduction of efficiency and worst of all—loss of life. Watch for safety hazards and correct deficiencies prompt-  
ly. Use the following safety precautions as a general guide to safe operations when using this machine.  
Additional safety precautions are used throughout this manual for specific operating and maintenance proce-  
dures. Read this manual and review the safety precautions often until you know the limitations.  
1. Read the Operator’s Manual. Failure to read the Operator’s Manual is considered a misuse of this equip-  
ment.  
2. Become familiar with all the machine’s controls and all the caution, warning and danger decals affixed  
to the machine before attempting to start or operate.  
3. Before starting or operating the machine, make a walk around inspection and check for obvious defects  
such as loose mounting bolts and damaged components. Correct any deficiency before starting.  
4. Do not allow children to operate the mower. Do not allow adults to operate it without proper instruction.  
5. Do not carry passengers.  
6. Keep the area of operation clear of all persons, particularly small children and pets. The operator should  
cease mowing whenever anyone comes within the operating area.  
7. Clear the work area of objects which might be picked up and thrown.  
8. Use a piece of cardboard or wood rather than hands to search for hydraulic leaks. Escaping hydraulic oil  
under pressure can penetrate skin. If fluid is injected into the skin, it must be surgically removed within a  
few hours by a doctor familiar with this form of injury or gangrene may result.  
9. Do not operate without all guards and shields in place and in good condition.  
10. Stop PTO, lower implement to ground, place tractor transmission in neutral or park, set parking brake, stop  
tractor engine, remove ignition key and wait for all motion to completely stop before leaving the tractor.  
11. Keep hands and feet away from blades.  
12. This mower is not to be operated in any area where people may be present unless all  
sides of the unit are enclosed by a curtain guard that is in good repair.  
13. Wear personal protective equipment such as, but not limited to, protection for eyes, ears, feet, hands and  
head when operating or repairing the equipment. Do not wear loose clothing or jewelry that may catch on  
equipment moving parts.  
14. When performing adjustments or maintenance on the mower, first lower it to the ground or block it securely  
at a workable height.  
15. Never stand between tractor and mower while tractor is being backed to the cutter hitch.  
16. Reduce speed when transporting mower to avoid bouncing and momentary loss of steering.  
17. Use tractor flashing warning lights, day or night, when transporting mower on road or highways unless pro-  
hibited by law.  
18. Pin transport lock to retain cutter bar in transport position.  
19. Lower mower to ground before unhitching from tractor.  
20. In the event that someone other than yourself will operate this equipment we firmly suggest that all  
SAFETY references be discussed prior to operation.  
21. It is recommended that tractor be equipped with Rollover Protective System (ROPS) enclosed cab, and a  
seat belt.  
5
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IMPORTANT FEDERAL LAWS AND REGULATIONS* CONCERNING  
EMPLOYERS, EMPLOYEES AND OPERATIONS.  
*(This section is intended to explain in broad terms the concept and effect of the following federal laws and  
regulations. It is not intended as a legal interpretation of the laws and should not be considered as such).  
U.S. Public Law 91-596 (The Williams-Steiger Occupational and Health Act of 1970) OSHA  
This Act Seeks:  
“...to assure so far as possible every working man and woman in the nation safe and healthful working  
conditions and to preserve our human resources...”  
DUTIES  
Sec. 5 (a) Each employer—  
(1) shall furnish to each of his employees employment and a place of employment  
which are free from recognized hazards that are causing or are likely to cause  
death or serious physical harm to his employees;  
(2) shall comply with occupational safety and health standards promulgated under  
this Act.  
(b) Each employee shall comply with occupational safety and health standards  
and all rules, regulations and orders issued pursuant to this Act which are  
applicable to his own actions and conduct.  
OSHA Regulations  
Current OSHA regulations state in part: “At the time of initial assignment and at least annually thereafter, the  
employer shall instruct every employee in the safe operation and servicing of all equipment with which the  
employee is, or will be involved.” These will include (but are not limited to) instructions to:  
Keep all guards in place when the machine is in operation;  
Permit no riders on equipment;  
Stop engine, disconnect the power source, and wait for all machine movement to stop before  
servicing, adjusting, cleaning or unclogging the equipment, except where the machine must be  
running to be properly serviced or maintained, in which case the employer shall instruct employees  
as to all steps and procedures which are necessary to safely service or maintain the equipment.  
Make sure everyone is clear of machinery before starting the engine, engaging power, or operating  
the machine.  
EMPLOYEE TRACTOR OPERATING INSTRUCTIONS:  
1. Securely fasten your seat belt if the tractor has a  
ROPS.  
5. Watch where you are going, especially at row  
ends, on roads, and around trees.  
2. Where possible, avoid operating the tractor near  
ditches, embankments, and holes.  
6. Do not permit others to ride.  
7. Operate the tractor smoothly - no jerky turns,  
starts, or stops.  
3. Reduce speed when turning, crossing slopes, and  
on rough, slick, or muddy surfaces.  
8. Hitch only to the drawbar and hitch points recom-  
mended by tractor manufacturers.  
4. Stay off slopes too steep for safe operation.  
9. When tractor is stopped, set brakes securely and  
use park lock if available.  
Child Labor Under 16 Years Old  
Some regulations specify that no one under the age of 16 may operate power machinery. It is your  
responsibility to know what these regulations are in your own area or situation. (Refer to U.S. Dept. of  
Labor, Employment Standard Administration, Wage & Home Division, Child Labor Bulletin #102.)  
6
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SECTION 1  
INTRODUCTION AND DESCRIPTION  
1-2 DESCRIPTION  
1-1 INTRODUCTION  
The GHM (Figure 1-1) is intended for cutting hay  
and grass in a clean maintained area. A breakaway  
mechanism built into the three point hitch allows cut-  
ter bar to pivot back if a stationary object is hit. The  
cutter bar consists of individual spindle assemblies  
driven from the main gearbox by a gear train. An  
optional overrunning clutch is available to allow  
“coast down” of blades when PTO is disengaged.  
We are pleased to have you as a Bush Hog cus-  
tomer. Your GHM hay mower has been carefully  
designed to give maximum service with minimum  
down time. This manual is provided to give you the  
necessary operating and maintenance instructions for  
keeping your mower in top operating condition.  
Please read this manual thoroughly. Understand what  
each control is for and how to use it. Observe all safe-  
ty precautions decaled on the machine and noted  
throughout the manual for safe operation of imple-  
ment. If any assistance or additional information is  
needed, contact your authorized Bush Hog dealer.  
NOTE  
All references made to right, left, front,  
rear, top or bottom is as viewed facing the  
direction of forward travel with implement  
properly attached to tractor.  
Figure 1-1 GHM Major Components (Safety Curtain Removed To Show Details Only)  
HM 900 Shown  
Curtain Support Assembly  
Swathboard  
Helper Spring Assembly  
Three Point Hitch  
Transport Lock  
Crop Divider  
Cutter Bar  
Gearbox  
Hitch Breakaway  
Parking Stand  
7
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SECTION II  
PREPARATION FOR USE  
Figure 2-1 Hitch Adjustments  
WARNING  
TO AVOID SERIOUS INJURY OR DEATH  
NEVER STAND BETWEEN TRACTOR  
AND MOWER WHILE TRACTOR IS BEING  
BACKED TO HITCH.  
NARROW  
WARNING  
TO AVOID SERIOUS INJURY OR DEATH  
ADDITIONAL TRACTOR FRONT BAL-  
LAST MAY BE NEEDED FOR STABLE  
OPERATION AND TRANSPORT OF  
MOWER. SEE TRACTOR OPERATOR’S  
MANUAL  
WEIGHTS.  
FOR  
RECOMMENDED  
During mower operations, the right tractor tire should  
run on stubble between the cut and uncut crop. As  
shown in Figure 2-1, tractors with smaller/larger  
wheel tread widths require the mower to be mounted  
differently to achieve this.  
STANDARD  
A. Position mower hitch pins and attach mower  
to tractor according to the illustration in Figure 2-1  
that is closest to your situation. Hitch pins are  
reversible to accommodate Cat.I or Cat. II hitches.  
On larger tractors it may also be necessary to move  
the right wheel inward. The STANDARD configura-  
tion will work on tractors with a maximum dimension  
of 46” from centerline to outside of right tire.  
46”  
Max.  
NOTE  
If tractor is equipped with a Cat. II quick  
hitch, mower must have optional bushings  
installed on upper and lower lift pins as  
shown in Figure 2-2. Lower lift pins must be  
attached to the mower as shown in the  
STANDARD configuration of Figure 2-1.  
WIDE  
B. Connect and/or adjust stabilizer bars, sway  
blocks, sway chains, or equivalent to prevent laterql  
movement of lift arms. Refer to tractor operator’s  
manual.  
C. Connect hydraulic hose to tractor remote  
hydraulic outlet.  
Figure 2-2  
Hitch Pin Bushings  
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D. Attach PTO driveline to tractor 540 rpm or  
1000 rpm PTO shaft. Make certain driveline is  
securely connected at both ends. Attach PTO drive-  
line shield safety chain on both the implement and  
tractor ends. (Figure 2-3)  
H. Check to be certain all persons are clear of  
cutter bar.  
I. Raise mower using tractor 3-point lift. Raise  
cutter bar to transport position. When cylinder “bot-  
toms out” hold valve open an additional 3-5 seconds  
to purge air from system.  
J. Pin transport lock to retain cutter bar in the  
transport position. (Figure 2-6)  
Figure 2-5  
CAUTION  
DO NOT USE A PTO SHAFT ADAPTER WITH THIS  
IMPLEMENT. USE OF A PTO SHAFT ADAPTER  
WILL VOID ALL WARRANTY CONSIDERATIONS.  
E. Pin parking stand in work position. (Figure 2-4)  
F. Adjust tractor lower lift arms so vertical main  
frame is perpendicular to the ground as shown in  
Figure 2-5.  
G. Set tractor 3-point hitch depth control or install  
the optional check chain assembly to stop with the  
horizontal main frame pivot approximately 20 inches  
from the ground. (Figure 2-4)  
Figure 2-3  
90°  
Ground  
Figure 2-6 Transport Lock  
Fasten Shield Safety  
Chains At Each End  
Figure 2-4  
20”  
Parking Stand Stored  
Ground  
9
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SECTION III  
OPERATING INSTRUCTIONS  
3-3 TRANSPORTING  
3-1 GENERAL SAFETY  
WARNING  
Only qualified people familiar with this operator’s  
manual should operate this machine. Operator  
should wear hard hat, safety glasses and safety  
shoes. The operator should read, understand and  
practice all safety messages shown on the caution,  
warning and danger decals affixed to the mower to  
avoid serious injury or death. It is recommended that  
tractor be equipped with Rollover Protective System  
(ROPS) and a seat belt be used. Before beginning  
operation, clear work area of any objects that may  
be picked up and thrown. Check for ditches, stumps,  
holes or other obstacles that could upset tractor or  
damage mower. Always turn off tractor engine, set  
parking brake, lower mower to ground and allow  
blades to come to a complete stop before leaving  
tractor operator’s seat.  
TO AVOID SERIOUS INJURY OR DEATH,  
DO NOT ALLOW CUTTER BAR TO CON-  
TACT ELECTRICAL WIRES. USE CARE  
WHEN PASSING BENEATH OVERHEAD  
OBSTRUCTIONS.  
Raise mower off ground using 3-point hitch. Fully  
raise cutter bar and pin transport lock in the trans-  
port position. (Figure 2-6) Place parking stand in the  
work position as shown in Figure 2-4. Make certain  
slow moving vehicle (SMV) sign mounted on rear  
shield is clean and in good condition. When trans-  
ported on roads or highways, day or night, use trac-  
tor flashing warning lights unless prohibited by law.  
Do not exceed 15 mph.  
3-4 BREAKAWAY LATCH  
3-2 CUTTING HEIGHT  
IMPORTANT  
During operation the cutter bar should  
operate at 90° to the path of travel. The  
lead angle of the cutter bar may be adjust-  
ed by varying the mounting position of the  
breakaway assembly. The combination of  
holes and adjustment plate allow up to five  
different positions. (Figure 3-2)  
Cutting height is controlled by tilting the cutter bar  
forward or rearward. Shorten the 3-point hitch top  
link to tilt cutter bar forward and decrease cutting  
height or lengthen top link to increase cutting height.  
Recommended cutting heights are approximately 1”  
to 2-1/2”.  
The breakaway latch, shown in Figure 3-2, allows  
the cutter bar to swing rearward if an obstruction is  
hit. If the latch releases, stop tractor and disengage  
PTO immediately. Thoroughly check cutter bar com-  
ponents for damage.  
Figure 3-1  
3-Point Hitch Top Link - Cutting Height Adjustment  
Figure 3-2  
Breakaway Latch  
Lead Adjustment Plate  
IMPORTANT  
FAILURE TO STOP IMMEDIATELY AFTER  
BREAKAWAY LATCH TRIPS CAN CAUSE  
DAMAGE TO MOWER  
To reset breakaway latch, slowly back up tractor  
with PTO disengaged and without raising cutter bar.  
The pressure of the cutter bar on the ground should  
be enough to reset latch.  
10  
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Breakaway pressure is regulated by the tension of  
the latch springs (Figure 3-3). Spring length as  
shipped from the factory is 4-1/8” and is satisfactory  
for most conditions. Breakaway pressure can be  
increased by turning spring retaining nuts clockwise  
or decreased by turning counterclockwise. DO NOT  
COLLAPSE SPRING TO LESS THAN 3-3/4” OR  
SPRING WILL BECOME SOLID BEFORE LATCH  
CAN TRIP.  
E. With tractor at idle speed, engage PTO drive.  
Set tractor throttle for 540 PTO rpm for models GHM  
700, GHM 800, and GHM 900 and 1000 PTO rpm  
for models GHM 1800 and GHM 1900.  
F. Place tractor in a gear that will give proper  
speed for terrain and crop conditions , then begin  
mowing. Tractor forward speed should be controlled  
by gear selection, not engine speed. For maximum  
efficiency, forward speed should allow mower to  
maintain a constant maximum blade speed.  
Figure 3-3  
If tractor engine stalls, do not slip tractor clutch to  
allow engine to regain speed as this will exert  
tremendous strain on the driveline. When stalling  
occurs,disengage PTO drive, move to a cut area,set  
tractor throttle at idle, then re-engage PTO drive. If  
stalling continues, use lower gear.  
Breakaway Latch Spring  
4-1/8”  
DANGER  
TO AVOID SERIOUS INJURY OR DEATH  
FROM THROWN OBJECTS:  
DO NOT OPERATE WITH CURTAIN  
GUARD REMOVED. DO NOT OPERATE  
WITHOUT CURTAIN GUARD IN GOOD  
CONDITION OR REPAIR.  
3-5 OPERATION  
A. Perform BEFORE EACH USE maintenance  
listed in paragraph 4-1.  
B. Pin parking stand and transport latch in the  
work position.  
3-6 SWATH BOARD  
C. Start tractor. Set tractor 3-point hitch depth  
control or install the optional check chain assembly  
to stop with the horizontal main frame pivot approxi-  
mately 20” from the ground. (Figure 2-4) Check  
chain retainers should be installed onto tractor rear  
casting using top link pin.  
The swath board is manufactured in the correct posi-  
tion for most efficient operation. However, some  
conditions may require that the swath board be  
removed. To do this remove the bolt at the spring  
assembly and remove the complete assembly.  
D. Lower cutter bar parallel to ground. Lower 3-  
point hitch to work position. Place control valve for  
cutter bar cylinder in “float” position.  
Figure 3-4 Swath Board Assembly  
Crop Divider  
DANGER  
TO AVOID SERIOUS INJURY OR DEATH:  
STAY CLEAR OF ROTATING DRIVELINE.  
DO  
NOT  
OPERATE  
WITHOUT  
DRIVELINE SHIELDS IN PLACE AND IN  
GOOD CONDITION.  
DANGER  
TO AVOID SERIOUS INJURY OR DEATH:  
STAND CLEAR OF ROTATING MOWER  
BLADES UNTIL ALL MOTION HAS  
STOPPED. TO AVOID ACCIDENTAL  
FALL FROM TRACTOR AND POSSIBLE  
INJURY FROM MOWER, IT IS RECOM-  
MENDED THAT TRACTOR BE EQUIPPED  
WITH ROLLOVER PROTECTIVE SYSTEM  
(ROPS) AND THAT A SEAT BELT BE  
USED FOR ALL MOWING OPERATIONS.  
Swath Board  
Spring Assembly  
11  
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Figure 3-5  
Helper Spring Assembly  
3-7 CUTTER BAR HELPER SPRING  
ADJUSTMENT (9’ MODELS ONLY)  
The 9’ models are equipped with a helper spring  
assembly to transfer cutter bar weight from the  
outer end of the cutter bar back to the frame  
assembly. The recommended minimum adjustment  
measurement is 5-1/2” from under the bolt head to  
the end of the rod weldment nut. (Figure 3-5) To  
transfer more weight, shorten the measurement. To  
transfer less weight, lengthen the measurement. Be  
advised, the shorter the measurement, the less the  
outer end of the cutter bar can reach down.  
3-8 UNHITCHING FROM TRACTOR AND  
STORAGE  
To prevent rust, always clean all debris from mower  
after use. Store in a clean, dry place preferably with  
a hard, level floor. Clean and paint any areas where  
paint is missing. Apply a light coat of grease to cylin-  
der rod..  
Figure 3-6 Parking Stand  
Unhitch mower as follows:  
A. Pin parking stand in the down position as  
shown in Figure 3-6.  
B. Unfold cutter bar and lower to ground.  
C. Lower 3-point hitch to rest on parking stand.  
Make certain all pressure is relieved from cutter bar  
cylinder.  
D. Disconnect PTO driveline, hydraulic hose, and  
3-point links.  
WARNING  
TO AVOID SERIOUS INJURY OR DEATH:  
ALWAYS STORE MOWER WITH THE  
CUTTER BAR IN THE UNFOLDED  
(HORIZONTAL) POSITION.  
SECTION IV  
MAINTENANCE  
BEFORE EACH USE  
4-1 MAINTENANCE CHECK LIST  
1. Perform LUBRICATION per paragraph 4-2.  
2. Check blades and spindles to be sure that no  
foreign objects such as wire or steel strapping  
bands are wrapped around them.  
3. Inspect blades for wear. Replace if necessary  
per paragraph 4-3. Always replace both blades  
with two blades equal in weight. Use only  
genuine Bush Hog replacement parts.  
4. Check blade bolts for tightness. Tighten to 50 ft./lbs.  
5. Make certain all shields are in place and in good  
condition. Repair or replace any missing or dam-  
aged shields.  
Perform scheduled maintenance as outlined below.  
Lower implement to ground, turn off tractor, and set  
parking brake before doing maintenance inspections  
or work. Some checks may require raising machine  
off ground and supporting with blocks. All bolts  
should be torqued as indicated in torque at end of  
manual unless otherwise indicated.  
WARNING  
THE MOWER CAN FALL FROM  
HYDRAULIC SYSTEM FAILURE. TO AVOID  
SERIOUS INJURY OR DEATH, SECURELY  
SUPPORT MOWER BEFORE WORKING  
UNDERNEATH.  
6. Check tractor tire air pressure. Refer to tractor oper-  
ator’s manual.  
7. During operation, listen for abnormal sounds which  
might indicate loose parts, damaged bearings, or  
other damage. Correct any deficiency before contin-  
uing operation.  
12  
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AFTER EACH USE  
Figure 4-1a  
1. Clean all debris from machine. Replace any  
missing or illegible decals.  
(2) BEfore Each Use  
2. Inspect mower for worn or damaged components.  
Repair or replace before next use. Any replace  
ment components installed during repair shall  
include the components current safety decals  
specified by the manufacturer to be affixed to the  
component.  
(1) Before Each Use  
3. Store mower in a dry place.  
4-2 LUBRICATION (Figures 4-1a, b, c, d)  
NOTE  
The multi-purpose grease referenced in this  
section is an NLGI Grade 2 type grease.  
(7) 20 Hours  
To Remove Yoke Shield: Turn all three tabs 1/4 turn  
with screwdriver and remove tabs. Slide cover and  
plastic tube back.  
8 HOURS  
1. Driveline Universal Joints - Apply multi-purpose  
grease with grease gun.  
2. Driveline Guard - Apply 2-3 shots of multipur-  
pose grease with grease gun to plastic fitting.  
3. Cutter Bar Pivot - Apply multi-purpose grease  
with grease gun. (2 fittings)  
Figure 4-1b  
(4) 20 Hours  
20 HOURS  
4. Main Gearbox - Add EP80W-90 gear oil, if nec-  
essary, to bring oil level to mark on dip stick.  
5. Gear Bar Assembly - Fold mower into the trans-  
port position and fasten transport lock. Clean any  
grime and filth from around the fill/level plug. Add  
EP80W-90 gear oil, if necessary, to bring oil level  
up to the fill hole.  
6. Overrunning Clutch - Apply multi-purpose grease  
with grease gun.  
7. Driveline - Disconnect PTO driveline, pull the two  
sections apart, apply thin coat of multi-purpose  
grease to outside of inner (male)  
section.Reassemble sections and install. Pull  
each section to be sure driveline and shields are  
securely connected. Make certain PTO shielding  
is in good condition.  
(3) Before Each Use  
Figure 4-1d  
(5) 20 Hours - Gear Bar Lube  
8. Mast Pivot - Apply multi-purpose grease with  
grease gun. (Figure 4-4)  
Figure 4-1c  
Overrunning Clutch (6) 20 Hours  
13  
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4-3 BLADE REPLACEMENT  
4-5 BELT REPLACEMENT  
The disc mower blades each have two cutting  
edges. When one edge becomes dull or damaged,  
remove the bolt and turn the blade over, Nuts can be  
re-used if not damaged. If both cutting edges of the  
blade have been used, the blades must be replaced.  
Always replace both blades on a spindle to retain  
balance. When replacing blades, the attaching  
bolt and nut should also be replaced. Use only  
genuine Bush Hog replacement parts. (Figure 4-2)  
Replacement belts are sold in matched sets. To  
maintain an equal amount of tension on each belt,  
replace all belts at same time. Use only genuine  
Bush Hog replacement parts. Replace as follows:  
A. Remove belt shield cover.  
B. Loosen jackshaft assembly pivot bolt, loosen  
jamnut, and turn adjusting nut (Figure 4-4) counter-  
clockwise to relieve belt tension.  
C. Remove belts.  
D. Install new matched set of belts.  
E. Tighten adjusting nut until belts deflect 1/2”  
with 10 lbs. of force applied (Figure 4-3). Rotate  
belt pulleys 6 complete revolutions to seat the  
belts into the pulleys. Tighten adjusting nut a sec-  
ond time until belts deflect 1/2” with 10 lbs. of force  
applied. Tighten jam nut on adjusting nut and tighten  
assembly pivot bolt.  
Figure 4-2  
Blade Bolt  
F. Install belt shield cover.  
Figure 4-4 (8) Mast Pivot Grease Fitting  
Blade Disc  
Blade  
Stop  
When replacing blades, insure that  
shoulder of blade nut is seated into  
the blade stop and blade disc.  
Blade  
Torque blade bolt to 50 ft. lbs. Strike  
nut with hammer and retorque.  
Nut  
4-4 BELT ADJUSTMENT  
Belt tension should be checked after first 2 hours of  
operation and thereafter every 40 hours to get maxi-  
mum life from drive belts and best performance from  
mower. To check adjustment, push upward through  
hole in bottom of belt shield with 10 lbs. of force. Belt  
should deflect approximately 1/2 inch (Figure 4-3).  
To increase tension, loosen jackshaft assembly pivot  
bolt, (Figure 4-8), loosen jam nut, and turn adjusting  
nut (Figure 4-4) clockwise. Tighten pivot bolt and  
jam nut.  
Belt Tension Adjusting Nut  
4-6 SPINDLE HOUSING REMOVAL AND  
REASSEMBLY  
A. Lower cutter bar to rest on a flat surface that  
will support the entire length. (Figure 4-5)  
B. Remove the cap and the blade disc assembly  
retaining nut on desired blade disc assembly. The  
outer gear housing assembly has the crop divider  
asembled to the blade disc assembly. The cap for  
the crop divider must be removed to provide access  
to the retaining nut.  
Figure 4-3  
Approximately 1/2”  
STANDARD CROP DIVIDER - Detach the cap and  
cutter by removing the four (4) capscrews attaching  
the cap to the crop divider. (Figure 4-6)  
OPTIONAL CROP DIVIDER - Remove cap by loos-  
ening jam nut, turn threaded rod counterclockwise  
so cap moves down on threaded rod approximately  
1-1/2” tilt cap sideways and remove out the top of  
crop divider. (Figure 4-7)  
Ruler  
Straight Edge  
10 lbs. of force  
14  
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(Curtain Removed To Show Details Only)  
Figure 4-5  
Standard Crop  
Divider  
Blade Disc Cap Covering  
Retaining Nut  
Cutter Bar  
Figure 4-6 Standard Crop Divider  
Cutter  
Figure 4-7 Optional Crop Divider  
Hub Cap  
Threaded Rod  
Cap  
Jam Nut  
Crop  
Divider  
Cap  
Crop  
Divider  
R e t a i n i n g  
Nut  
Blade Disc  
Assembly  
Output Shaft  
Retaining Nut  
The blade disc assembly is now ready to be  
removed from the cutter bar. If required, a steady  
prying force on either side of the cutter bar, spaced  
180° apart, can aid in removing the blade disc  
assembly from the spindle shaft.  
Blade Disc  
Assembly  
Output Shaft  
Cutter Bar  
Figure 4-8  
C. Remove the six (6) M10 nuts connecting the  
spindle assembly to the cutter bar. (Figure 4-8)  
D. Lightly tap a screwdriver into the two slotted  
notches cast into each spindle housing, positioned  
180° apart. Simultaneously and with equal force,  
press downward on the two screwdrivers. When the  
sealant attaching the spindle housing to the cutter  
bar has been broken, remove the entire spindle  
assembly from the cutter bar taking special care  
to keep dirt and debris out of the cutter bar.  
E. Prior to reassembling the spindle assembly  
onto the cutter bar (see your Bush Hog Repair Parts  
Catalog for the spindle assembly part number), thor-  
oughly clean the top face of the cutter bar casing  
where the spindle was originally located of all  
old sealant, oil and dirt.  
F. Draw a bead of oil resistant gasket sealant  
(Dow Corning 735 sealant recommended by  
manufacturer) around the perimeter of the spin-  
dle housing opening in the cutter bar casing.  
G. Position the spindle assembly over the six  
(6) M10 bolts (ensuring that blade disc will  
assemble at 90° to the adjacent assembly) and  
join the spindle assembly to the cutter bar using  
the six (6) M10 nuts removed in Step C. Apply  
Loctite 242 thread sealant to the threads of the  
Spindle  
Assembly  
six (6) M10 bolts and torque the nuts to a value  
of 62.5 - 73 ft./lbs.  
H. Install blade disc assembly onto the same  
gear assembly from which it was removed, making  
sure the blades of the disc assembly being  
installed are exactly 90° apart from both adjacent  
blade disc assemblies to ensure proper timing.  
Tighten the retaining nut to 200 ft./lbs. The outer  
gear housing assembly has the crop divider assem-  
bled to the blade disc assembly. The cap for the  
crop divider must be installed.  
15  
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STANDARD CROP DIVIDER (Figure 4-6) Reattach  
the cap and cutter to the crop divider by reinstalling  
the four(4) capscrews through the top of crop divider  
and tightening securely.  
4-8 CUTTER BAR INSTALLATION  
A. Install gearbox into frame, securing with front  
mounting lug and two bolts. (Figure 4-10)  
B. Install sheave (Figure 4-11) onto gearbox input  
shaft and key aligning with driver sheave. Alternately  
tighten the three retaining bolts.  
C. Install matched set of belts (Figure 4-11) Tighten  
adjusting nut until belts deflect 1/2” with 10 pounds of  
force applied. Rotate belt pulleys 6 complete revolu-  
tions to seat the belts into the pulleys. Tighten  
adjusting nut a second time until the belts deflect 1/2 “  
with 10 pounds of force applied. Tighten jam nut on  
adjusting nut and tighten assembly pivot bolt.  
OPTIONAL CROP DIVIDER (Figure 4-7) Tilt cap  
sideways and insert cap assembly into the top of the  
crop divider. Insert pointed end of threaded rod into  
the center hole on the end of the round output shaft.  
Tighten cap by turning threaded rod clockwise so cap  
moves up on threaded rod until it fits tight into taper  
of crop divider. Tighten jam nut. Snap on hub cap.  
4-7 CUTTER BAR REMOVAL  
D. Install belt shield rear cover. Figure 4-9)  
A. Lower cutter bar to rest on the ground.  
B. Remove pin (Figure 4-9) and disconnect cylin-  
der from cylinder lug. For models with cutter bar  
helper spring only, disconnect helper spring assem-  
bly from curtain/beam assembly.  
E. Attach shield and curtain/beam assembly to  
gearbox/cutter bar assembly. (Figure 4-9)  
F. Pin cylinder to cylinder lug. For models with cut-  
ter bar helper spring assembly, attach spring assembly  
to curtain/beam assembly. (Figure 4-9)  
C. Detach shield and curtain/beam assembly  
from the gearbox/cutter bar assembly. (Figure 4-9)  
D. Remove belt shield rear cover. (Figure 4-9)  
E. Loosen tension then remove the belts.  
Figure 4-10  
F. Remove three bolts securing sheave to gear-  
box input shaft. Install bolts in adjacent holes and  
progressively tighten to remove sheave from tapered  
hub. (Figure 4-11  
G. Remove the two bolts securing the front  
mounting lug (Figure 4-10). Remove front mounting  
lug. Detach gearbox/cutter bar assembly from the  
main beam/hitch frame assembly.  
Two Bolts Securing  
Front Mounting Lug  
Figure 4-9  
Helper Spring  
Curtain/Beam  
Assembly  
Shield  
Belt Shield  
Cylinder Pin  
16  
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Figure 4-11  
(3) Retaining Plate  
Pivot Bolt  
Belt Tension  
Adjusting Bolt  
Key  
Bushing  
(1) Belts  
Securing Bolts  
(2) Sheave  
4-9 TROUBLESHOOTING  
Troubleshooting procedures are listed in Table 4-1 below. If the problem cannot be solved or replacement parts  
are necessary, contact your authorized Bush Hog dealer. Please have ready your machine name, model num-  
ber, serial number, purchase date and exact cause or description of problem.  
Table 4-1 Troubleshooting  
PROBLEM  
PROBABLE CAUSE  
REMEDY  
Uneven or streaked stubble  
Cylinder control valve not in “float”  
position.  
Place valve in “float” position  
Blades dull, rounded or broken  
Low PTO speed (heavy crops)  
High PTO speed (light crops)  
Material collecating on cutter bar  
Excessive ground speed  
Belt slippage  
Reverse or replace  
Operate at 540 or 1000 rpm  
Operate at 540 or 1000 rpm  
Reduce cuter bar lift  
Use lower gear  
Tighten or replace belt  
Remove swathboard  
Tilt cutter bar forward  
Replace blade  
Material dragging on swathboard  
Cutter bar tilted back too far  
Blade damaged or missing  
Disc damaged  
Stubble too long  
Vibration  
Replace disc  
Tapping or clicking noise  
Bent blade or rock guard  
Blade disc out of time  
Repair or replace  
Correct timing  
17  
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Figure 4-12 Cutter Bar Arrangement and Blade Rotation  
8’  
MAIN GEARBOX  
7’  
9’  
MAIN GEARBOX  
MAIN GEARBOX  
CW  
CW  
CW  
#1  
#1  
#1  
#2  
CCW  
CW  
CW  
#2  
#3  
#2  
#3  
CW  
#3  
#4  
#5  
#6  
CCW  
CW  
CCW  
CW  
CCW  
#4  
#5  
#4  
#5  
CW  
CCW  
CW  
CCW  
CCW  
#6  
#7  
CCW  
FORWARD  
NOTE  
The blades of adjacent oval discs must be 90° apart from one  
another as shown above to ensure proper timing.  
18  
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SECTION V  
ASSEMBLY  
CAUTION  
THE FOLLOWING SAFETY PRECAUTIONS SHOULD  
BE THOROUGHLY UNDERSTOOD BEFORE  
ATTEMPTING MACHINE ASSEMBLY.  
1. Wear protective equipment such as , but not limited to, protection for eyes, ears, feet, hands, lungs and  
head when assembling the equipment. Do not wear loose clothing or jewelry that may catch on equipment  
moving parts.  
2. Do not lift heavy parts or assemblies. Use crane, jack, tackle, fork t5rucks, or other mechanical devices.  
3. Select an area for assembly that is clean and free of any debris which might cause persons working on the  
assembly to trip.  
4. Arrange parts to be assembled neatly in the work area and have tools or other mechanical assisting  
devices in easy reach.  
5. Inspect all parts and asemblies thoroughly and remove any sharp edges, grease, oil, or dirt which might  
cause pieces to slip when handling.  
6. Preview the asembly instructions in your operator’s manual berfore proceeding further.  
7. If the assembly instructions call for parts or assemblies 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.  
8. Never put hands or any other part of body under blocked up assemblies if at all possible.  
9. Always wear goggles or safety glasses when hammering, grinding or drilliing metal parts.  
10. If the assembly calls for welding or cutting, be sure that there are no flammable materials close at hand and  
the bystanders have taken necessary precautions.  
AFTER COMPLETING ANY ASSEMBLY STEP, THOROUGHLY READ THE NEXT STEP IN THE ASSEMBLY  
INSTRUCTIONS BEFORE PROCEEDING WITH THAT STEP.  
11. After completing assembly, thoroughly inspect the machine to be sure that all nuts, bolts, hydraulic fittings  
or any other fastened assemblies have been thogoughtly tightened.  
12. After completing assembly, be sure that all safety locking devices or guards are in place.  
13. Before operating the machine, thoroughly read the operation section of this manual.  
14. Before operating, read the maintenance section of this manual to be sure that any parts requiring  
lubrication such as gearboxes are full to avoid any possible damage.  
BEFORE OPERATING THE EQUIPMENT, IF YOU HAVE ANY QUESTIONS REGARDING THE PROPER  
ASSEMBLY OR OPERATION, CONTACT YOUR AUTHORIZED BUSH HOG DEALER OR REPRESENTATIVE.  
A. Attach hitch assembly to cutter bar assembly  
using 1 x 9” pin, cotter pin, 3/8 x 2” bolt, and locknut.  
The bolt should be installed through the welded  
bushing. (Figure 5-1)  
B. Slide breakaway assembly over bushing on  
hitch mast and rotate 180 degrees to lock in place.  
Fasten breakaway assembly to beam using 1 x 3-3/4”  
bolt and locknut.  
C. Pin butt end of cylinder and beam spring cush-  
ion to frame using 1 x 8-1/8” pin, 3/8 x 2” bolt, and  
locknut. Note that cylinder ports must be facing down.  
D. Fasten opposite end of spring cushion to beam  
using 1/2 x 2-1/4” bolt and locknut.  
I. Attach dirt shield with 1/2 x 2-1/2” bolts, nuts,  
flatwashers, lockwashers and spacer.  
J. Attach upper end of dirt shield to dirt shield brack-  
et with 3/8 x 1” machine screws, nuts and washers.  
K. Attach rear bracket to curtain beam plate with  
1/2 x 3” bolt, nut and lockiwasher.  
L. Fasten front and rear curtain supports to sup-  
port beam using 3/8 x 2-1/4” bolts and locknuts. Do  
not over-tighten to allow curtain supports to pivot.  
Attach curtain adjustment chain between beam and  
frame as shown. (Figure 5-1)  
M. Remove solid plug from butt end of cylin-  
der and install vent plug. Plumb opposite end of  
cylinder as shown in Figure 5-2. Be sure that restric-  
tor is in place on elbow.  
E. Pin parking stand in place.  
F. Attach curtain support beam to the gearbox  
using four 12mm x 40mm bolts and lockwashers.  
G. Attach gearbox strap with 1/2 x 2” bolts, nuts  
and lockwashers.  
H. Attach cylinder lug and dirt shield bracket to  
curtain support beam using two 1 x 5-1/4” pins, cotter  
pins and flatwashers.  
N. Pin rod end of cylinder to cylinder lug.  
O. (GHM 900 and 1900 only) Connect cutter bar  
helper spring to curtain support beam. Connect oppo-  
site end of helper spring to frame.  
P. Lay curtain over supports. Secure using 3/8 x  
1” machine screws, flatwashers, lockwashers and  
nuts. Use a tube clip to secure curtain to the left end  
19  
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of front and rear curtain support.  
Q. Fasten transport latch to curtain support  
beam using a 5/8 x 1-3/4” bolt and locknut. Pin  
opposite end in place with faspin.  
R. Install curtain stop weldment flush with end of  
curtain support beam using one 5/8” U-bolt, lock-  
washer, flatwashers and nuts.  
Figure 5-1 Assembly  
Curtain  
Cutter Bar  
Helper Spring  
Beam Spring  
Cushion  
Cylinder  
Hitch  
Assy.  
Cylinder  
Lug  
Transport  
Latch  
Parking  
Stand  
Curtain Support  
Beam  
Curtain  
Support  
Breakaway Assy.  
Beam  
Dirt Shield  
Tube  
Clip  
Gearbox  
Curtain Stop  
Weldment  
Swath Board  
Curtain Adjustment Chain  
Crop Divider  
Figure 5-2  
Hydraulic Hose  
Restrictor  
Elbow  
Vent Plug  
Butt End  
Cylinder  
20  
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SAFETY DECALS  
To promote safe operation, Bush Hog supplies safety decals on all products manufactured. Because damage  
can occur to safety decals either through shipment, use or reconditioning, Bush Hog will, upon request, provide  
safety decals for any of our products in the field at no charge. Contact your authorized Bush Hog dealer for  
more information.  
82617  
86158  
86160  
24-6-423  
60873  
60874  
21  
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86159  
86118  
50012616  
78608  
50012615  
78786  
22  
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TORQUE SPECIFICATIONS  
Proper toque for American fasteners used on Bush Hog equipment.  
Recommended Torque in Foot Pounds (Newton Meters).*  
AMERICAN  
BOLT DIAMETER  
Bolt Head Markings  
WRENCH  
SIZE (IN.) A”  
(IN.) B” AND  
THREAD SIZE  
SAE  
GRADE 2  
SAE  
GRADE 5  
SAE  
GRADE 8  
7/16  
7/16  
1/4 - 2O UNC  
1/4 - 28 UNF  
5/16 - 18 UNC  
5/16 - 24 UNF  
3/8 - 16 UNC  
3/8 - 24 UNF  
7/16 - 14 UNC  
7/16 - 20 UNF  
1/2 - 13 UNC  
1/2 - 20 UNF  
9/16 - 12 UNC  
9/16 - 18 UNF  
5/8 - 11 UNC  
5/8 - 18 UNF  
3/4 - 10 UNC  
3/4 - 16 UNF  
7/8 - 9 UNC  
6 (7)  
8 (11)  
10 (13)  
12 (16)  
14 (18)  
6 (8)  
1/2  
11 (15)  
17 (23)  
25 (33)  
SAE Grade 2  
(No Dashes)  
1/2  
13 (17)  
19 (26)  
27 (37)  
9/16  
20 (27)  
31 (42)  
44 (60)  
9/16  
23 (31)  
35 (47)  
49 (66)  
5/8  
32 (43)  
49 (66)  
70 (95)  
5/8  
36 (49)  
55 (75)  
78 (106)  
3/4  
49 (66)  
76 (103)  
106 (144)  
120 (163)  
153 (207)  
172 (233)  
212 (287)  
240 (325)  
376 (509)  
420 (569)  
606 (821)  
668 (905)  
909 (1232)  
995 (1348)  
1019 (1381)  
1288(1745)  
1444 (1957)  
1817 (2462)  
2013 (2728)  
2382 (3228)  
2712 (3675)  
3161 (4283)  
3557 (4820)  
3/4  
55 (75)  
85 (115)  
7/8  
70 (95)  
109 (148)  
122 (165)  
150 (203)  
170 (230)  
266 (360)  
297 (402)  
430 (583)  
474 (642)  
644 (873)  
705 (955)  
721 (977)  
795 (1077)  
890 (1206)  
1120 (1518)  
1241 (1682)  
1470 (1992)  
1672 (2266)  
1950 (2642)  
2194 (2973)  
7/8  
79 (107)  
97 (131)  
110 (149)  
144 (195)  
192 (260)  
166 (225)  
184 (249)  
250 (339)  
274 (371)  
280 (379)  
354 (480)  
397 (538)  
500 (678)  
553 (749)  
655 (887)  
746 (1011)  
870 (1179)  
979 (1327)  
SAE Grade 5  
(3 Dashes)  
15/16  
15/16  
1-1/8  
1-1/8  
1-5/16  
1-5/16  
1-1/2  
1-1/2  
1-1/2  
1-11/16  
1-11/16  
1-7/8  
1-7/8  
2-1/16  
2-1/16  
2-1/4  
2-1/4  
7/8 - 14 UNF  
1 - 8 UNC  
1 - 12 UNF  
Wrench  
Size “A”  
SAE Grade 8  
(6 Dashes)  
1 - 14 UNF  
1-1/8 - 7 UNC  
1-1/8 - 12 UNF  
1-1/4 - 7 UNC  
1-1/4 - 12 UNF  
1-3/8 - 6 UNC  
1-3/8 - 12 UNF  
1-1/2 - 6 UNC  
1-1/2 - 12 UNF  
Proper torque for metric fasteners used on Bush Hog equpment.  
Recommended torque in foot pounds (newton Meters).*  
METRIC  
WRENCH  
SIZE  
BOLT  
DIA.  
ASTM  
4.6  
ASTM  
8.8  
ASTM  
9.8  
ASTM  
10.9  
(mm) “A”  
(mm) “B”  
8
5
1.8 (2.4)  
3 (4)  
5.1 (6.9)  
8.7 (12)  
21.1 (29)  
42 (57)  
6.5 (8.8)  
11.1 (15)  
27 (37)  
10  
13  
16  
18  
21  
24  
30  
33  
36  
41  
46  
6
8
7.3 (10)  
14.5 (20)  
25 (34)  
40 (54)  
62 (84)  
122 (165)  
Wrench  
Size “A”  
10  
12  
14  
16  
20  
22  
24  
27  
30  
53 (72)  
8.8  
74 (100)  
118 (160)  
167 (226)  
325 (440)  
443 (600)  
563 (763)  
821 (1112)  
1119 (1516)  
73 (99)  
93 (126)  
116 (157)  
181 (245)  
148 (201)  
230 (312)  
449 (608)  
611 (828)  
778 (1054)  
1138 (1542)  
1547 (2096)  
Numbers appearing on bolt heads  
indicate ASTM class.  
*Use 75% of the specified torque value for plated  
fasteners. Use 85% of the specificed torque  
values for lubricated fasteners.  
211 (286)  
418 (566)  
23  
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®
BUSH HOG, L.L.C.  
P.O. Box 1039  
Telephone (334) 874-2700 www.bushhog.com  
Selma, AL 36702-1039  
ꢀꢀ  
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