MTD Snow Blower H660G User Manual

Operator’s Manual  
Snow Thrower  
Model H660G  
IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY  
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered,  
brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or state  
laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator. In the State of California the  
above is required by law (Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply  
on federal lands. A spark arrester for the muffler is available through your nearest engine authorized service dealer or contact the service  
department, P.O. Box 361131 Cleveland, Ohio 44136-9722.  
MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-9722  
769-00814.
(6/2003)  
FORM NO  
.
PRINTED IN U.S.A.  
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SECTION 1: IMPORTANT SAFE OPERATION PRACTICES  
This symbol points out important safety instructions, which if not followed, could endanger the personal  
safety and/or property of yourself and others. Read and follow all instructions in this manual before  
attempting to operate this machine. Failure to comply with these instructions may result in personal  
injury. When you see this symbol—heed its warning.  
WARNING: Engine Exhaust, some of its constituents, and certain vehicle components  
contain or emit chemicals known to the State of California to cause cancer, birth defects or  
other reproductive harm.  
DANGER: This machine was built to be operated according to the rules for safe operation in this  
manual. As with any type of power equipment, carelessness or error on the part of the operator can  
result in serious injury. This machine is capable of amputating hands and feet and throwing objects.  
Failure to observe the following safety instructions could result in serious injury or death.  
7. Never attempt to make any adjustments while engine is  
running, except where specifically recommended in the  
1. Read, understand, and follow all instructions on the  
operator’s manual.  
TRAINING  
machine and in the manual(s) before attempting to  
8. Let engine and machine adjust to outdoor temperature  
assemble and operate. Keep this manual in a safe place  
before starting to clear snow.  
for future and regular reference and for ordering  
replacement parts.  
9. To avoid personal injury or property damage use extreme  
care in handling gasoline. Gasoline is extremely  
2. Be familiar with all controls and their proper operation.  
flammable and the vapors are explosive. Serious  
Know how to stop the machine and disengage them  
personal injury can occur when gasoline is spilled on  
quickly.  
yourself or your clothes, which can ignite. Wash your skin  
3. Never allow children under 14 years old to operate this  
and change clothes immediately.  
machine. Children 14 years old and over should read and  
a. Use only an approved gasoline container.  
understand the operation instructions and safety rules in  
b. Extinguish all cigarettes, cigars, pipes and other  
this manual and should be trained and supervised by a  
sources of ignition.  
parent.  
c. Never fuel machine indoors.  
4. Never allow adults to operate this machine without  
d. Never remove gas cap or add fuel while the  
proper instruction.  
engine is hot or running.  
5. Thrown objects can cause serious personal injury. Plan  
e. Allow engine to cool at least two minutes before  
your snow-throwing pattern to avoid discharge of material  
refueling.  
toward roads, bystanders and the like.  
f. Never over fill fuel tank. Fill tank to no more than  
6. Keep bystanders, helpers, pets and children at least 75  
½ inch below bottom of filler neck to provide space  
feet from the machine while it is in operation. Stop  
for fuel expansion.  
machine if anyone enters the area.  
g. Replace gasoline cap and tighten securely.  
7. Exercise caution to avoid slipping or falling, especially  
h. If gasoline is spilled, wipe it off the engine and  
when operating in reverse.  
equipment. Move machine to another area. Wait 5  
minutes before starting the engine.  
i. Never store the machine or fuel container inside  
PREPARATION  
where there is an open flame, spark or pilot light  
1. Thoroughly inspect the area where the equipment is to  
(e.g. furnace, water heater, space heater, clothes  
be used. Remove all doormats, newspapers, sleds,  
dryer etc.).  
boards, wires and other foreign objects, which could be  
j. Allow machine to cool at least 5 minutes before  
tripped over or thrown by the auger/impeller.  
storing.  
2. Always wear safety glasses or eye shields during  
operation and while performing an adjustment or repair to  
OPERATION  
protect your eyes. Thrown objects which ricochet can  
cause serious injury to the eyes.  
1. Do not put hands or feet near rotating parts, in the auger/  
3. Do not operate without wearing adequate winter outer  
impeller housing or discharge chute. Contact with the  
garments. Do not wear jewelry, long scarves or other  
rotating parts can amputate hands and feet.  
loose clothing, which could become entangled in moving  
2. The auger/impeller clutch lever is a safety device. Never  
parts. Wear footwear which will improve footing on  
bypass its operation. Doing so makes the machine  
slippery surfaces.  
4. Use a grounded three-wire extension cord and  
unsafe and may cause personal injury.  
3. The clutch levers must operate easily in both directions  
and automatically return to the disengaged position when  
5. Adjust collector housing height to clear gravel or crushed  
released.  
4. Never operate with a missing or damaged discharge  
6. Disengage all clutch levers before starting the engine.  
chute. Keep all safety devices in place and working.  
receptacle for all units with electric start engines.  
rock surfaces.  
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5. Never run an engine indoors or in a poorly ventilated  
area. Engine exhaust contains carbon monoxide, an  
odorless and deadly gas.  
6. Do not operate machine while under the influence of  
alcohol or drugs.  
MAINTENANCE AND STORAGE  
1. Never tamper with safety devices. Check their proper  
operation regularly. Refer to the maintenance and  
adjustment sections of this manual.  
2. Before cleaning, repairing or inspecting machine  
disengage all clutch levers and stop engine. Wait until the  
auger/impeller come to a complete stop. Disconnect the  
spark plug wire and ground against the engine to prevent  
unintended starting.  
3. Check bolts and screws for proper tightness at frequent  
intervals to keep the machine in safe working condition.  
Also, visually inspect machine for any damage.  
4. Do not change the engine governor setting or over-speed  
the engine. The governor controls the maximum safe  
operating speed of the engine.  
5. Snow thrower shave plates and skid shoes are subject to  
wear and damage. For your safety protection, frequently  
check all components and replace with original  
equipment manufacturer’s (OEM) parts only. “Use of  
parts which do not meet the original equipment  
specifications may lead to improper performance and  
compromise safety!”  
6. Check clutch controls periodically to verify they engage  
and disengage properly and adjust, if necessary. Refer to  
the adjustment section in this operator’s manual for  
instructions.  
7. Maintain or replace safety and instruction labels, as  
necessary.  
8. Observe proper disposal laws and regulations for gas,  
oil, etc. to protect the environment.  
9. Prior to storing, run machine a few minutes to clear snow  
from machine and prevent freeze up of auger/impeller.  
10. Never store the machine or fuel container inside where  
there is an open flame, spark or pilot light such as a water  
heater, furnace, clothes dryer etc.  
7. Muffler and engine become hot and can cause a burn. Do  
not touch.  
8. Exercise extreme caution when operating on or crossing  
gravel surfaces. Stay alert for hidden hazards or traffic.  
9. Exercise caution when changing direction and while  
operating on slopes.  
10. Plan your snow-throwing pattern to avoid discharge  
towards windows, walls, cars etc. Thus, avoiding  
possible property damage or personal injury caused by a  
ricochet.  
11. Never direct discharge at children, bystanders and pets  
or allow anyone in front of the machine.  
12. Do not overload machine capacity by attempting to clear  
snow at too fast of a rate.  
13. Never operate this machine without good visibility or  
light. Always be sure of your footing and keep a firm hold  
on the handles. Walk, never run.  
14. Disengage power to the auger/impeller when  
transporting or not in use.  
15. Never operate machine at high transport speeds on  
slippery surfaces. Look down and behind and use care  
when in reverse.  
16. If the machine should start to vibrate abnormally, stop the  
engine, disconnect the spark plug wire and ground it  
against the engine. Inspect thoroughly for damage.  
Repair any damage before starting and operating.  
17. Disengage all clutch levers and stop engine before you  
leave the operating position (behind the handles). Wait  
until the auger/impeller comes to a complete stop before  
unclogging the discharge chute, making any  
adjustments, or inspections.  
18. Never put your hand in the discharge or collector  
openings. Always use the clean-out tool provided to  
unclog the discharge opening. Do not unclog discharge  
chute while engine is running. Shut off engine and remain  
behind handles until all moving parts have stopped  
before unclogging.  
11. Always refer to the operator’s manual for proper  
instructions on off-season storage.  
WARNING — YOUR RESPONSIBILITY:  
Restrict the use of this power machine to persons who  
read, understand and follow the warnings and  
instructions in this manual and on the machine. The  
safety labels are shown below for your reference.  
19. Use only attachments and accessories approved by the  
manufacturer (e.g. wheel weights, tire chains, cabs etc.).  
20. If situations occur which are not covered in this manual,  
use care and good judgment. Contact your dealer or  
telephone 1-800-800-7310 for assistance and the name  
of your nearest servicing dealer.  
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SECTION 2: ASSEMBLING YOUR SNOW THROWER  
Loose Parts  
The augers are secured to the auger shaft with two  
shear bolts and hex lock nuts. If you hit a foreign object  
or ice jam, the snow thrower is designed so that the  
Upper  
Shift Rod  
Shift Rod  
bolts may shear. Two replacement shear bolts and nuts  
are provided for your convenience. Store in a safe place  
until needed. See Figure 1.  
Connector  
Lower  
Shift Rod  
Shear Bolts  
Hex Lock  
Nuts  
Wing Nuts  
Figure 1  
Assembly  
Figure 3  
WARNING: Disconnect spark plug wire  
and ground it against the engine to prevent  
unintended starting.  
Slide the connector down over the end of the lower  
shift rod. See Figure 3. Tap the connector until it  
locks on the lower shift rod.  
NOTE: All references to right or left side of the snow  
thrower are determined from behind the unit in the  
operating position. The “operator’s position” is defined  
as standing directly behind the snow thrower, facing the  
handle panel.  
If the connector is not properly assembled, the shift rod  
will pivot and you will not be able to change speeds or  
change directions.  
Thread the jam nuts all the way up each of the “Z”  
fittings, toward the handle panel. See Figure 4.  
Handle  
Remove the lower two plastic wing knobs, cupped  
washers and carriage bolt (eyebolt on the left side)  
from the lower handle. See Figure 2.  
Control Lever  
Panel  
Lower  
Handle  
Handle  
Panel  
“Z”  
Fitting  
Jam Nut  
Upper Handle  
Cable Coupling End  
Wing Nuts,  
Washers, & Bolts  
Make Sure Cable  
Is Straight  
Figure 2  
Figure 4  
Raise the upper handle assembly until it locks over  
the lower handle. See Figure 3.  
Make certain all cables are in the grooves of the  
cable roller guides located in the lower rear of the  
unit, one on each side.  
Thread the coupling end of the cable onto the  
threaded portion of the “Z” fitting until the rubber  
bumper (located on the underside of the control  
lever) only lightly contacts the upper handle.  
Observe the lower rear area of the snow thrower to  
be sure both cables are aligned with roller guides.  
Secure the upper handle and lower handle with the  
two plastic wing knobs, cupped washers and  
carriage bolt (eyebolt on the left side) previously  
removed. See Figure 3.  
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IMPORTANT: The cable should have very little slack, but  
should NOT be tight. An overtightened cable may  
prohibit the auger and drive from disengaging.  
Unwrap the headlight wire, which is attached to the  
headlight beneath the handle panel.  
Wind the headlight wire around the right handle  
until excess slack is removed.  
Plug the wire from the headlight into the wire lead  
coming from the right side of the engine, beneath  
the fuel tank. See Figure 6.  
WARNING: Over-tightening the cable may  
prohibit the auger and drive from disengaging  
and compromise the safety of the snow  
thrower. Do NOT overtighten the cable.  
Lower Handle  
Once properly adjusted, tighten the jam nut against  
the coupling end of the cable to lock it in position.  
Lamp Wire  
Refer to Auger Control Test on page 9 prior to operating  
your snow thrower. Read and follow all instructions  
carefully and perform all adjustments to verify your  
snow thrower is operating safely and properly.  
Alternator Lead  
If not already attached, slip the cables that run from  
the handle panel to the chute into the cable guide  
located on top of the engine. See Figure 5.  
Cable Guide  
Figure 6  
Figure 5  
SECTION 3: KNOW YOUR SNOW THROWER  
Traction / Auger Control Lock  
This same control also locks the auger control so you  
can turn the chute directional control without  
WARNING: Be familiar with all controls  
and their proper operation. Know how to stop  
the machine and disengage them quickly.  
interrupting the snow throwing process. If the auger  
control is engaged with the traction control engaged,  
the operator can release the auger control (on the left  
handle) and the augers will remain engaged. Release  
the traction control to stop both the augers and wheel  
drive (auger control must also be released).  
Shift Lever  
The shift lever is located in the center of the handle  
panel. The shift lever may be moved into one of eight  
positions. Run engine with throttle in the fast position.  
Use the shift lever to determine ground speed.  
Forward: There are six speeds. Position one (1) is the  
slowest. Position six (6) is the fastest.  
Chute Directional Control  
The chute directional control is located on left hand side  
of the snow thrower.To change the direction in which  
snow is thrown, rotate chute directional control as  
follows:  
Reverse: There are two reverse (R) speeds R1 and R2.  
The “R2” closest to the operator (all the way back) is the  
faster of the two.  
Clockwise to discharge to the left.  
Counterclockwise to discharge to the right.  
Auger/Traction Control  
The auger control is located on the left handle. Squeeze  
the control to engage the augers; release to stop the  
augers. The traction control must also be released.  
Chute Tilt Control  
The distance snow is thrown can be changed by  
adjusting the angle of the chute assembly. Move the  
chute tilt control forward to decrease the distance,  
toward the rear to increase. See Figure 7.  
The traction control is located on the right handle.  
Squeeze the control to engage the wheel drive.  
Release to stop.  
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Shift Lever  
Chute Tilt  
Control  
Traction Control /  
Clean-out  
Tool  
Auger Control Lock  
Heated Handles Switch  
Headlight  
Auger Drive Control  
Discharge  
Chute  
Spark Plug  
Choke  
Primer  
Chute Directional  
Control  
Recoil Starter  
Handle  
Closed  
Ignition Key  
Skid Shoe  
Open  
Auger  
Fuel Shut-Off Valve  
Throttle Control  
Figure 7  
Heated Handles Switch  
Ignition Key  
The heated handles switch is located on the right side  
of the snow thrower handle panel. To activate the  
heated handles, toggle the switch to the right to  
generate heat within the handles. Toggle the heated  
handles switch to the left into the OFF position after  
using the snow thrower.  
The ignition key must be inserted in the switch in order  
for the engine to start. Remove the ignition key when  
the snow thrower is not in use.  
NOTE: Do NOT “turn” the ignition key in an attempt to  
start the engine. Doing so may cause it to break.  
The heated handles are a compliment to, not a  
substitute for, proper cold weather outerwear for hands.  
It is recommended that the user wear adequate winter  
protection for hands (like gloves/mittens) when  
operating this snow thrower.  
Fuel Shut-Off Valve (optional equipment)  
On models so equipped, the fuel shut-off valve, located  
under fuel tank, controls fuel-flow from the gas tank.  
See Figure 7.  
Throttle Control  
Headlight  
The headlight is on whenever the engine is running.  
The throttle control is located on the engine. It regulates  
the speed of the engine. See Figure 7.  
Chute Clean-Out Tool  
Skid Shoe  
The position of the skid shoe is determined by the  
condition of the ground from where snow has to be  
removed. See Figure 7.  
WARNING: Never use your hand to clear a  
clogged discharge chute. Shut off engine and  
remain behind handles until all moving parts  
have stopped before unclogging.  
The chute clean-out tool (see Figure 7) is designed to  
clear a clogged discharge chute. Refer to Operating Your  
Snow Thrower on page 10 for detailed instructions on how  
to properly use the chute clean-out tool.  
NOTE: This item is fastened with a cable tie to the rear  
of the Auger Housing at the factory. Cut the cable tie  
before operating the snow thrower.  
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SECTION 4: OPERATING YOUR SNOW THROWER  
Recoil Starter:  
Before Starting  
Rotate choke knob to FULL choke position (cold  
engine start).  
WARNING: Read, understand, and follow  
all instructions and warnings on the machine  
and in this manual before operating.  
If engine is warm, place choke in OFF position  
instead of FULL.  
Push primer button three or four times for cold  
engine start. DO NOT use primer to restart a warm  
engine after a short shutdown.  
The spark plug wire was disconnected for safety.  
Attach spark plug wire to spark plug before starting.  
NOTE: Always cover vent hole in primer button when  
pushing. Additional priming may be necessary for first  
start if temperature is below 15 degrees Fahrenheit.  
Gas And Oil Fill-up  
At the factory, a plastic cup is inserted inside the  
fuel tank’s fill opening (beneath the fuel cap) to  
prevent debris from entering the fuel tank during  
assembly. Remove and discard this cup before  
filling up the tank.  
Grasp starter handle and pull rope out slowly, until it  
pulls slightly harder. Let rope rewind slowly.  
Pull starter handle rapidly. Do not allow handle to  
snap back. Allow it to rewind slowly while keeping a  
firm hold on the starter handle.  
WARNING: Use extreme care when  
handling gasoline. Gasoline is extremely  
flammable and the vapors are explosive.  
Never fuel machine indoor or while the  
engine is hot or running. Extinguish  
cigarettes, cigars, pipes and other sources of  
ignition.  
Repeat step above until engine starts.  
As engine warms up and begins to operate evenly,  
rotate choke knob slowly to OFF position. If engine  
falters, return to FULL choke, then slowly move to  
OFF position.  
Electric Starter  
The electric starter is equipped with a grounded three-  
wire power cord and plug, and is designed to operate  
on 120 volt AC household current.  
Starting Engine  
IMPORTANT: Prior to operating your snow  
thrower, read, understand and follow ALL  
instructions to perform adjustments found  
under the heading Auger Control Test on  
page 9 of this manual.  
WARNING: The electric starter must be  
used with a properly grounded three-prong  
receptacle at all times to avoid possibility of  
electric shock. Follow all instructions carefully  
to operate the electric starter.  
Attach spark plug wire to spark plug. Make certain  
the metal loop on end of the spark plug wire (inside  
the boot) is fastened securely over the metal tip on  
the spark plug. See Figure 8.  
Determine that your house wiring is a three-wire  
grounded system. Ask a licensed electrician if you  
are not certain.  
If your home wiring system is not a three-wire  
grounded system, do not use this electric starter  
under any conditions.  
If your home electrical system is grounded, but  
a three-hole receptacle is not available, one should  
be installed by a licensed electrician before using  
the electric starter.  
If you have a grounded three-prong receptacle,  
proceed as follows:  
Connect power cord to switch box on engine. Plug  
the other end of power cord into a three-prong 120-  
volt, grounded, AC receptacle.  
Rotate choke knob to FULL choke position (cold  
engine start). If engine is warm, place choke in OFF  
position instead of FULL.  
Metal Loop  
Rubber Boot  
Figure 8  
Make certain the fuel shut-off valve, if so equipped,  
is in the OPEN (vertical) position.  
Make certain the auger and traction controls are in  
the disengaged (released) position.  
Move throttle control up to FAST position. Insert  
ignition key into slot. Be certain it snaps into place.  
Do not turn key. See Figure 7.  
NOTE: Engine will not start unless ignition key is  
inserted into ignition slot in carburetor cover. Do not  
turn ignition key.  
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Push primer button two or three times for cold  
engine start, making sure to cover vent hole in  
primer button when pushing. DO NOT use primer to  
restart a warm engine after a short shutdown.  
Push starter button to start engine.  
When engine starts, release starter button and  
move choke gradually to OFF. If engine falters,  
move choke immediately to FULL and then  
gradually to OFF.  
Squeeze the auger control and the augers will turn.  
Release it and the augers will stop.  
Squeeze traction control and the snow thrower will  
move. Release it and unit will stop. Never move  
shift lever without releasing traction control.  
To Engage Augers  
To engage augers and start throwing snow,  
squeeze the auger control against the left handle.  
Release to stop the augers.  
When disconnecting the power cord, always unplug  
from the three-prong receptacle first, and then from  
the snow thrower.  
Auger Control Test  
IMPORTANT: Perform the following test before operating  
the snow thrower for the first time and at the start of  
each winter season.  
To Stop Engine  
To stop engine, remove the ignition key. Do not turn  
key. Disconnect the spark plug wire from the spark  
plug to prevent accidental starting while equipment  
is unattended.  
Check the adjustment of the auger control as follows:  
When the auger control is released and in the  
disengaged “up” position, the cable should have  
very little slack, but should NOT be tight.  
To prevent starter freeze-up:  
Run engine for a few minutes before stopping to  
help dry off any moisture on the engine.  
WARNING: Do not over-tighten the cable.  
Over-tightening may prevent the auger from  
disengaging and compromise the safety of the  
snow thrower.  
Electric Starter: Connect power cord to switch box  
on engine, then to 120 volt AC receptacle. With the  
engine running, push starter button and spin the  
starter for several seconds. The unusual sound  
made by spinning the starter will not harm engine or  
starter. Disconnect the power cord from receptacle  
first, and then from switch box.  
In a well-ventilated area, start the snow thrower  
engine as instructed earlier in this section under the  
heading Starting Engine. Make sure the throttle is set  
in the FAST position.  
Recoil Starter: With engine running, pull starter  
rope with a rapid, continuous full arm stroke three  
or four times. Pulling the starter rope will produce a  
loud clattering sound, which is not harmful to the  
engine or starter.  
Wipe all snow and moisture from the carburetor  
cover in the area of the control levers. Also, move  
control levers back and forth several times. Leave  
throttle control lever in the STOP or OFF position.  
Leave choke control in the FULL choke position.  
Remove ignition key and disconnect spark plug  
wire. Do not turn key.  
While standing in the operator’s position (behind  
the snow thrower) engage the auger.  
Allow the auger to remain engaged for  
approximately ten (10) seconds before releasing  
the auger control. Repeat this several times.  
With the engine running in the FAST position and  
the auger control lever in the disengaged “up”  
position, walk to the front of the machine.  
Confirm that the auger has completely stopped  
rotating and shows NO signs of motion.  
IMPORTANT: If the auger shows ANY signs of rotating,  
immediately return to the operator’s position and shut  
off the engine. Wait for all moving parts to stop before  
readjusting the auger control cable.  
IMPORTANT: Do not lose the ignition key. Keep it in a  
safe place. Engine will not start without the ignition key.  
To readjust the control cable, loosen the hex jam  
nut on the auger control cable “Z” fitting.  
Rotate the coupling end of the cable  
counterclockwise to provide more slack.  
Retighten the hex jam nut. See Figure 9.  
To Engage Drive  
With the engine running near top speed, move shift  
lever into one of the five FORWARD positions or  
two REVERSE positions. Select a speed  
appropriate for the snow conditions that exist. Use  
the slower speeds until you are familiar with the  
operation of the snow thrower.  
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Handle  
Panel  
Auger Control  
Lever  
Drift Cutters (Optional Equipment)  
Drift cutters should be used when operating the snow  
thrower in heavy drift conditions.  
On models so equipped, drift cutters are assembled to  
the auger housing inverted. Remove the carriage bolts  
by unthreading the hex nuts which secure them, and  
reinstall the drift cutters in their proper position before  
operating the snow thrower. See Figure 10.  
“Z”  
Fitting  
Jam Nut  
Make Sure Cable  
Is Straight  
Figure 9  
Drift  
Cutter  
Repeat Auger Control Test to verify proper  
adjustment has been achieved.  
Carriage Screws/  
Hex Nuts  
Chute Clean-Out Tool  
Figure 10  
The chute clean-out tool is conveniently fastened to the  
rear of the auger housing with a mounting clip (Refer to  
Figure 7). If the discharge chute becomes clogged  
during operation, proceed as follows to safely clean the  
chute and chute opening:  
If your unit is not equipped with drift cutters, contact  
Customer Support as instructed on page 2 for  
information regarding price and availability.  
Snow Thrower Model  
Drift Cutter Kit  
1. Release both the Auger Control Lever and the  
Traction/Auger Control Lock Lever.  
All models  
OEM-390-679  
2. Stop the engine by removing the ignition key.  
3. Remove the clean-out tool from the clip which  
secures it to the rear of the auger housing.  
4. Use the shovel-shaped end of the clean-out tool to  
remove any snow and ice in the discharge chute.  
Operating Tips  
NOTE: Allow the engine to warm up for a few minutes  
as the engine will not develop full power until it reaches  
operating temperature.  
WARNING: Never use your hand to clear a  
clogged discharge chute. Shut off engine and  
remain behind handles until all moving parts  
have stopped before unclogging.  
WARNING: The muffler, engine and their  
surrounding areas become hot and can cause  
a burn. Do not touch.  
Discharge snow downwind whenever possible.  
Slightly overlap each previous path.  
Set the skid shoes 1/4" below the scraper bar for  
normal usage. The skid shoes may be adjusted  
upward for hard-packed snow. Adjust downward  
when using on gravel or crushed rock.  
5. Refasten the clean-out tool to the mounting clip on  
the rear of the auger housing, re-start the engine.  
6. While standing in the operator’s position (behind  
the snow thrower), engage the auger clutch lever  
for a few seconds to clear any remaining snow or  
ice from the discharge chute before continuing to  
clear snow.  
Avoid possible starter freeze-up. Clean the snow  
thrower thoroughly after each use.  
Tire Chains (Optional Equipment)  
Tire chains may be used whenever extra traction is  
needed. Contact Customer Support as instructed on  
page 2 for information regarding price and availability.  
10  
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SECTION 5: MAKING ADJUSTMENTS  
Frame Cover  
WARNING: NEVER attempt to make any  
adjustments while the engine is running,  
except where specified in the operator’s  
manual.  
Tire Pressure (Pneumatic Tires)  
The tires are over-inflated for shipping purposes.  
Before operating, check tire pressure and reduce, if  
necessary, to between 15 psi and 20 psi.  
NOTE: If the tire pressure is not equal in both tires, the  
unit may pull to one side or the other.  
Traction Control and Shift Lever  
To check the adjustment of the traction control and  
shift lever, proceed as follows:  
Auger  
Housing  
With the engine off, move the shift lever all the way  
forward to sixth (6) position. With the traction  
control released, push the snow thrower forward.  
The unit should move forward freely. Then engage  
the traction control grip. Wheels should stop  
turning.  
Now release the traction control grip, and push the  
unit again.  
Move the shift lever back to the fast reverse  
position, then all the way forward again. There  
should be no resistance in the shift lever, and  
wheels should keep turning.  
If you feel resistance when moving the shift lever or  
the wheels stop when they should not, loosen the  
jam nut on the traction control cable and unthread  
the cable one turn.  
If the wheels do not stop when you engage the  
traction control grip, loosen the jam nut on the  
traction control cable and thread the cable in one  
turn. Recheck the adjustment and repeat as  
necessary. Tighten the jam nut to secure the cable  
when correct adjustment is reached.  
Figure 11  
Remove the frame cover underneath the snow  
thrower by removing six self-tapping screws.  
With the traction control released, there must be  
clearance between the friction wheel and the drive  
plate in all positions of the shift lever.  
With traction control engaged, the friction wheel  
must contact the drive plate. See Figure 12.  
Friction  
Wheel  
Gear Shaft  
WARNING: Drain the gasoline out of snow  
thrower engine, place a piece of plastic film  
under the gas cap to avoid spillage before  
beginning the job.  
Drive  
Plate  
To test further for correct adjustment, if necessary,  
proceed as follows:  
Figure 12  
Tip the snow thrower forward, allowing it to rest on  
the auger housing. See Figure 11.  
If adjustment is necessary:  
Loosen the jam nut on the traction drive cable and  
thread the cable in or out as necessary.  
Retighten the jam nut to secure the cable when  
correct adjustment is reached.  
Reassemble the frame cover.  
NOTE: If you placed plastic film under the gas cap, be  
certain to remove it before operating the snow thrower.  
11  
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Adjust skid shoes by loosening the four hex nuts  
and carriage bolts and moving skid shoes to  
desired position. Make certain the entire bottom  
surface of skid shoe is against the ground to avoid  
uneven wear on the skid shoes. Retighten nuts and  
bolts securely.  
Shift Rod  
To adjust the shift rod, proceed as follows.  
Remove the hairpin clip and slide the shift rod  
connector up, to separate the upper shift rod from  
the lower shift rod. See Figure 13.  
Place the shift lever into the sixth (6) position.  
Rotate the shift arm clockwise (from the operator’s  
position) as far as it will go.  
Thread the upper shift rod downward until the  
elbow on its lower end aligns with the hole found in  
the lower shift rod.  
Shift Lever  
Hairpin Clip  
Carriage Bolts  
Hex Nuts  
Ferrule  
Skid Shoe  
Figure 14  
Flat  
Washer  
Upper Shift Rod  
WARNING: Do not operate this snow  
thrower on gravel as loose gravel can be  
easily picked up and thrown by the auger  
causing injury to the operator and/or damage  
to the snow thrower.  
Hairpin Clip  
Shift Rod  
Connector  
Lower Shift Rod  
Drive Wheels  
Shift Arm  
Figure 13  
The wheels may be adjusted for two different methods  
of operation. The adjustment is made by placing the  
click pins in one of two different holes on the right side  
of the unit. See Figure 15.  
Reconnect the upper shift rod to the lower shift rod  
by reinserting the hairpin clip removed earlier and  
sliding the shift rod connector back down into place.  
IMPORTANT: Check for correct adjustment of the shift  
lever as instructed on page 11, before operating the  
snow thrower.  
Inside Hole  
in Axle  
Auger Control  
Refer to Auger Control Test on page 9 to adjust the auger  
control.  
Click Pin  
in Outside Hole  
Chute Assembly  
The distance snow is thrown can be adjusted by  
changing the angle of the chute assembly. Move the  
chute tilt control forward to decrease the distance,  
toward the rear to increase.  
Figure 15  
One Wheel Driving: Insert the click pin only  
through the outside hole of the axle (not the rim) on  
the right side of the snow thrower. This position  
gives power drive to the left wheel only, making the  
unit easier to maneuver.  
Skid Shoes  
The space between the shave plate and the ground can  
be adjusted. For close snow removal, place skid shoes  
in the low position. Use middle or high position when  
area to be cleared is uneven. See Figure 14.  
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Both Wheels Driving: Insert the click pin through  
the hole in the hub of the rim and the inside hole on  
the snow thrower’s right axle. This position is good  
for heavy snow as there is power drive in both  
wheels.  
IMPORTANT: Never operate the snow thrower with the  
click pin inserted through both the rim and the outside  
hole in the axle. Doing so can result in serious damage  
to the drive system.  
SECTION 6: MAINTAINING YOUR SNOW THROWER  
Auger Shaft  
WARNING: Before servicing, repairing or  
inspecting, disengage all clutch levers and  
stop engine. Wait until all moving parts have  
come to a complete stop. Disconnect spark  
plug wire and ground it against the engine to  
prevent unintended starting.  
At least once a season, remove shear bolts on  
auger shaft. Oil or spray lubricant inside shaft.  
Also lubricate the auger bearings at least once a  
season. See Figure 17.  
Shear Bolts  
Lubrication  
Engine  
Refer to the engine manual for maintenance  
procedures and instructions.  
WARNING: When following instructions in  
the engine manual for draining oil, be sure to  
protect frame to avoid oil dripping onto  
transmission parts.  
Gear Shaft  
Lubricate the gear shaft with a good all-weather  
multi-purpose light grease at least once a season or  
after every 25 hours of operation.  
Bearings  
Bearings  
Figure 17  
IMPORTANT: Keep all grease and oil off friction wheel  
and drive plate.  
Chute Directional Control  
The worm gear on the chute directional control  
should be greased with multipurpose automotive  
grease.  
Gear Case  
The auger gearbox has been filled with grease at  
the factory. If disassembled for repairs, lubricate  
with 1-1/2 ounces of grease, part no. 737-0168.  
Drive and Shifting Mechanism  
Remove rear cover. Oil any chains, sprockets,  
gears, bearings, shafts, and shifting mechanism at  
least once a season. Use engine oil or a spray  
lubricant. Avoid getting oil on rubber friction wheel  
and aluminum drive plate. See Figure 18.  
IMPORTANT: Do not overfill the gear case. Damage to  
the seals could result. Be sure the vent plug is free of  
grease in order to relieve pressure.  
Wheels  
Oil or spray lubricant into bearings at least once a  
season. Pull the klick pins and remove wheels,  
clean and coat axles with a multipurpose  
automotive grease. See Figure 16.  
Shift Lever  
Chain  
Klick Pin  
Axle  
Avoid oil on  
friction wheel and  
drive plate  
Gear Shaft  
13  
Figure 18  
Figure 16  
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hours of operation. The cams can be accessed beneath  
the handle panel. Use a multi-purpose automotive  
grease.  
Traction Control / Auger Control Lock  
The cams on the ends of the control rods which  
interlock the traction drive and auger drive controls  
must be lubricated at least once a season or every 25  
SECTION 7: SERVICE  
WARNING: Before servicing, repairing, or  
inspecting, disengage all clutch levers and  
stop engine. Wait until all moving parts have  
come to a complete stop. Disconnect spark  
plug wire and ground it against the engine to  
prevent unintended starting.  
Engine  
Refer to the separate engine manual packed with your  
unit for all engine maintenance procedures.  
Carriage  
Bolts  
Skid Shoe  
Augers  
The augers are secured to the spiral shaft with two  
shear bolts and hex lock nuts. If the snow thrower hits a  
foreign object or ice jam, the snow thrower is designed  
so that the bolts may shear.See Figure 17.  
Shave Plate  
Hex Nuts  
Skid Shoe  
Figure 19  
If the augers will not turn, check to see if the bolts  
have sheared. Two replacement shear bolts and  
hex lock nuts have been provided in the snow  
thrower’s hardware pack. When replacing bolts,  
spray an oil lubricant into shaft before inserting new  
bolts. For future use, order part number 710-0890A  
(shear bolt 5/16-18 x 1.5") and 712-0429 (hex lock  
nut 5/16-18).  
To remove shave plate, remove carriage bolts, bell  
washers and hex nuts which attach it to the snow  
thrower housing.  
Reassemble new shave plate, making sure heads  
of the carriage bolts are to the inside of the housing.  
Tighten securely.  
IMPORTANT: NEVER replace the auger shear bolts with  
standard hex bolts. Any damage to the auger gearbox  
or other components as a result of doing so will NOT be  
covered by your snow thrower’s warranty.  
Belt Replacement  
WARNING: Disconnect the spark plug wire  
from the spark plug and ground.  
Shave Plate and Skid Shoes  
Auger Belts  
The shave plate and skid shoes on the bottom of the  
snow thrower are subject to wear. They should be  
checked periodically and replaced when necessary.  
Remove the plastic belt cover on the front of the  
engine by removing the two self-tapping screws.  
See Figure 20.  
To remove skid shoes, remove the four carriage  
bolts, bell washers and hex nuts which attach them  
to the snow thrower. Reassemble new skid shoes  
with the four carriage bolts, bell washers (cupped  
side goes against skid shoes) and hex nuts. Make  
certain the skid shoes are adjusted to be level. See  
Figure 19.  
Drain the gasoline from the snow thrower, or place  
a piece of plastic under the gas cap.  
Tip the snow thrower up and forward so that it rests  
on the housing. See Figure 11.  
Remove six self-tapping screws from the frame  
cover underneath the snow thrower.  
14  
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Belt  
Cover  
Friction  
Wheel  
Self-Tapping  
Screws  
Support  
Bracket  
Rear Auger  
Belt  
Frame  
Figure 20  
Roll the front and rear auger belts off the engine  
pulley. See Figure 21.  
Front Auger  
Pulley  
Support  
Bracket  
Spring  
Drive  
Belt  
Rear Auger  
Belt  
Auger  
Pulley  
Auger  
Housing  
Engine  
Pulley  
Idler  
Spring  
Front Auger  
Belt  
Figure 22  
Idler  
Pulley  
Drive Belt  
Follow steps 1 through 4 of previous instructions.  
Pull idler pulley up, and lift belt off engine pulley  
and friction wheel disc. See Figure 21.  
Back out the stop bolt until the support bracket  
rests on the auger pulley. See Figure 23.  
Slip belt between friction wheel and friction wheel  
disc. Remove and replace belt. Reassemble  
following the instructions in reverse order.  
Idler  
Pulley  
Engine  
Pulley  
Figure 21  
NOTE: The support bracket must rest on the stop bolt  
after the new belt has been assembled. See Figure 23.  
Unhook the idler spring from the hex bolt on the  
auger housing. See Figure 22.  
Back out the stop bolt to allow the belts to slip  
between the bolt and auger pulley. See Figure 23.  
Friction  
Wheel  
Disc  
Friction Wheel  
Drive Belt  
NOTE: It may be necessary to loosen the six hex nuts  
that fasten the frame to the auger housing.  
Stop  
Bolt  
Lift the rear auger belt from the auger pulley, and  
slip belt between the support bracket and the auger  
pulley. See Figure 22. Repeat this step for front  
auger belt.  
Replace both auger drive belts by following  
instructions in reverse order.  
Support Bracket  
Figure 23  
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Lightly tap the hex nut to dislodge the ball bearing  
from the right side of frame. Remove the hex nut  
and bell washer from left end of shaft.  
Slide the gear shaft to the right and slide the friction  
wheel assembly from the shaft.  
Remove the four screws from the friction wheel  
assembly. Remove the friction wheel rubber from  
between the plates. See Figure 25.  
Reassemble new friction wheel rubber to the  
friction wheel assembly, tightening the four screws  
in rotation and with equal force.  
Changing Friction Wheel Rubber  
The rubber on the friction wheel is subject to wear and  
should be checked after 25 hours of operation, and  
periodically thereafter. Replace the friction wheel  
rubber if any signs of wear or cracking are found as  
follows:  
Drain the gasoline from the snow thrower, or place  
a piece of plastic under the gas cap.  
Tip the snow thrower up and forward, so that it rests  
on the housing. See Figure 11.  
Remove the six self-tapping screws from the frame  
cover underneath the snow thrower.  
Remove the klick pins which secure the wheels,  
and remove the wheels from the axle.  
Plates  
Bearing  
Using a wrench to hold the shaft, loosen, but do not  
completely remove, the hex nut and bell washer on  
left end of gear shaft. See Figure 24.  
Screws  
Hub  
Friction Wheel Rubber  
Figure 25  
Slide friction wheel assembly back onto the gear  
shaft. Be sure to align the pin on the shift rod with  
hole in the friction wheel assembly. See Figure 22.  
Reassemble gear shaft and the wheels. Reattach  
the frame cover.  
Hex Nut and  
Bell Washer  
Chute  
Note: The unit is  
shown resting on  
its auger housing  
Auger  
Figure 24  
SECTION 8: OFF-SEASON STORAGE  
If unit is to be stored over 30 days, prepare for storage  
as follows:  
WARNING: Never store engine with fuel in  
tank indoors or in enclosed, poorly ventilated  
areas where fuel fumes may reach an open  
flame, spark or pilot light as on a furnace,  
water heater, clothes dryer, or other gas  
appliance.  
Remove gasoline from carburetor and fuel tank to  
prevent gum deposits from forming on these parts  
and causing possible malfunction of engine.  
Run engine until fuel tank is empty and engine  
stops due to lack of fuel.  
WARNING: Drain fuel into an approved  
container outdoors, away from an open flame.  
Allow engine to cool. Extinguish cigarettes,  
cigars, pipes, and other sources of ignition  
prior to draining fuel. Fuel left in engine for  
extended periods deteriorates and will cause  
starting problems.  
Drain carburetor by pressing upward on bowl drain,  
located below the carburetor cover.  
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Remove all dirt from exterior of engine and  
equipment.  
Follow lubrication recommendations on page 13.  
NOTE: Fuel stabilizer is an acceptable alternative in  
minimizing the formation of fuel gum deposits during  
storage. Do not drain carburetor if using fuel stabilizer.  
NOTE: When storing any type of power equipment in  
an poorly ventilated or metal storage shed, care should  
be taken to rustproof the equipment, especially springs,  
cables and all moving parts.  
Wipe equipment with an oiled rag to prevent rust.  
Remove spark plug and pour one ounce of engine  
oil through spark plug hole into cylinder. Cover  
spark plug hole with rag. Crank engine several  
times to distribute oil. Replace spark plug.  
SECTION 9: TROUBLE SHOOTING GUIDE  
Trouble  
Possible Cause(s)  
Corrective Action  
Engine fails to start Fuel tank empty, or stale fuel.  
Fill tank with clean, fresh gasoline. Fuel may not last over thirty days  
unless a fuel stabilizer is used.  
Clean fuel line.  
Move switch to ON position  
Clean, adjust gap or replace.  
Insert key.  
Blocked fuel line.  
Choke not in ON position  
Faulty spark plug.  
Key not in switch on engine.  
Spark plug wire  
Connect spark plug wire.  
disconnected.  
Primer button not depressed.  
Fuel shut-off valve closed  
(if so equipped).  
Refer to the engine manual packed with your unit.  
Open fuel shut-off valve.  
Engine runs erratic Unit running on CHOKE.  
Blocked fuel line or stale fuel.  
Move choke lever to OFF position.  
Clean fuel line; fill tank with clean fresh gasoline. Fuel may not last  
over thirty days unless a fuel stabilizer is used.  
Drain fuel tank. Refill with fresh fuel.  
Refer to the engine manual packed with your unit or have carburetor  
adjusted by an authorized service dealer.  
Water or dirt in fuel system.  
Carburetor out of adjustment.  
Loss of power  
Spark plug wire loose.  
Gas cap vent hole plugged.  
Exhaust port plugged.  
Carburetor not adjusted  
properly.  
Connect and tighten spark plug wire.  
Remove ice and snow from cap. Be certain vent hole is clear.  
Clean-see Maintenance section of engine manual.  
Refer to the engine manual packed with your unit or have carburetor  
adjusted by an authorized service dealer.  
Engine overheats  
Incorrect fuel mixture.  
Drain fuel tank. Refill with proper fuel mixture.  
Excessive vibration Loose parts or damaged auger. Stop engine immediately and disconnect spark plug wire. Tighten all  
bolts and nuts. Make all necessary repairs. If vibration continues, have  
unit serviced by an authorized service dealer.  
Unit fails to propel Incorrect adjustment of drive  
Adjust drive cable. Refer to Adjustment section of this manual.  
itself  
cable.  
Drive belt loose or damaged.  
Discharge chute clogged.  
Replace drive belt. Refer to Belt Replacement on page 14.  
Stop engine immediately and disconnect spark plug wire. Clean dis-  
charge chute and inside of auger housing.  
Unit fails to  
discharge snow  
Foreign object lodged in auger. Stop engine immediately and disconnect spark plug wire. Remove  
Incorrect adjustment of drive  
cable.  
Drive belt loose or damaged.  
Shear bolt(s) sheared  
object from auger.  
Adjust drive cable. Refer to Adjustment section of this manual.  
Replace drive belt. Refer to Belt Replacement on page 14.  
Replace shear bolt(s)  
NOTE: For repairs beyond the minor adjustments listed above, contact your nearest authorized service dealer or  
call 1-800-800-7310 for the Customer Support Center. Refer to separate engine manual packed with your snow  
thrower for more engine related information.  
17  
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SECTION 10: PARTS LIST  
68  
57  
58  
55  
27  
72  
53  
70  
72  
73  
80  
65  
27  
71  
69  
82  
64  
9
27  
68  
24  
83  
74  
61  
63  
59  
11  
58  
67  
69  
23  
27  
66  
54  
49  
76  
81  
56  
31  
40  
77  
15  
45  
78  
62  
79  
60  
11  
75  
52  
9
29  
51  
13  
46  
13  
47  
5
8
2
5
14  
17  
20  
24  
22  
10  
14  
21  
3
11  
50  
9
40  
18  
41  
16  
12  
4
1
26  
25  
31  
39  
11  
15  
43  
19  
9
48  
35  
37  
7
38  
28  
18  
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Model H660G  
Ref.  
Ref.  
No.  
Part No.  
No.  
Part Description  
Shift Arm Assembly  
Part No.  
Part Description  
Control Cable  
1.  
684-0008A  
710-0458  
710-0449  
710-0788  
710-0837  
710-1880  
711-0677  
712-0429  
712-3068  
714-0104  
720-0284  
725-1757  
736-0242  
736-0275  
736-0451  
747-0620A  
747-0621  
749-0951  
749-0952A  
749-0953A  
750-0963  
746-0778  
629-0059  
710-0262  
710-04071  
710-0599  
710-3015  
710-0805  
710-0895  
712-3027  
710-0643  
731-0851A  
731-1300B  
731-1313C  
731-04427  
736-0159  
736-0506  
746-0896  
47.  
48.  
49.  
50.  
51.  
52.  
53.  
54.  
55.  
56.  
57.  
58.  
59.  
60.  
61.  
62.  
63.  
64.  
65.  
66.  
67.  
68.  
69.  
70.  
71.  
72.  
73.  
74.  
75.  
76.  
77.  
78.  
79.  
80.  
81.  
82.  
83.  
746-0901  
736-0119  
732-0746  
784-5594  
784-5604  
629-1094  
684-0036A  
684-0037B  
710-1003  
712-0271  
712-0693  
716-0398  
720-0232  
725-1672  
735-0199A  
725-1756  
725-1759  
736-0509  
731-04450  
736-0226  
747-1136  
714-0507  
747-0877  
784-5680  
784-5679  
748-0362  
748-0363  
732-0145  
710-0459A  
784-5619A  
712-0116  
732-0193  
736-0105  
784-5682  
784-5681  
711-0653  
684-0103  
2.  
Carriage Bolt 5/16-18 x 1.75”  
Carriage Bolt 5/16-18 x 2.25”  
TT Screw 1/4-20 x 1”  
C-Sunk Screw #10-16x 0.625”  
Hex Screw 5/16-18 x.75”  
Ferrule  
Lock Washer 5/16  
Torsion Spring  
3.  
4.  
Cable Bracket  
5.  
Handle: Chute Tilt  
Harness Assembly: Upper  
Handle Assembly RH  
Handle Assembly LH  
Special Hex Screw  
Hex Sems Nut: 1/4-20  
Hex Nut  
7.  
8.  
9.  
Hex Lock Nut 5/16-18  
Hex Nut 5/16-18  
10.  
11.  
12.  
13.  
14.  
15.  
16.  
17.  
18.  
19.  
20.  
21.  
22.  
23.  
24.  
25.  
26.  
27.  
28.  
29.  
31.  
35.  
37.  
38.  
39.  
40.  
41.  
43.  
45.  
46.  
Cotter Pin  
Handle Knob  
Heated Grip  
Lock Ring: Toggle Switch  
Shift Knob  
Belleville Washer  
Flat Washer  
Lamp Housing  
Saddle Washer  
Rubber Bumper  
Shift Rod: Upper  
Toggle Switch: Single Switch  
Halogen Lamp: 50W, 12V  
Washer  
Shift Rod: Lower  
Lower Handle  
Upper Handle: L Style RH  
Upper Handle: L Style LH  
Connector: Shift Rod  
Z Cable Fitting  
Handle Panel  
Flat Washer  
Headlight Retainer  
Cotter Pin: 3/32 x.75  
Cam Rod  
Light Harness  
Carriage Bolt: 5/16-18 x 1.5”  
Carriage Bolt: 5.16-18 x 1.0”  
TT Screw: 1/4-20 x 0.5”  
Hex Screw 1/4-20  
Hex Screw: 5/16-18 x 1.5”  
Hex Screw AB:1/4-15 x 0.750”  
Hex Flange Lock Nut  
Hex Screw 5/16-18  
Chute Flange Keeper  
Lower Chute  
RH Handle Support Bracket  
LH Handle Support Bracket  
Cam Handle Lock  
Handle Lock Pawl  
Compression Spring:.36 x 1.0  
Hex Cap Screw: 3/8-24 x 1.5  
Shift Handle  
Jam Nut, 3/8-24  
Comp. Spring:.39 x.6 x.88  
Bell Washer  
Cable Guide: Chute Tilt  
Upper Chute  
RH Handle Support Bracket  
LH Handle Support Bracket  
Clevis Pin  
5/16 Washer  
Special Washer  
Handle Panel  
Control Cable  
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Model H660G  
27  
1
39  
38  
Drive Clutch Cable  
Auger Clutch Cable  
5
4
37  
13  
30  
7
45  
40  
6
3
4
30  
5
2
14  
36  
26  
15  
16  
44  
20  
9
7
10  
11  
25  
31  
12  
28  
23  
41  
17  
8
18  
4
24  
32  
1
22  
29  
1
33  
21  
30  
42  
5
8
34  
Auger Clutch Cable  
19  
43  
35  
46  
51  
51  
49  
1
1
47  
50  
48  
20  
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Model H660G  
REF.  
NO.  
1
2
3
4
5
6
7
PART  
NO.  
REF.  
NO.  
PART  
NO.  
DESCRIPTION  
Self-tapping Screw, 1/4-20 x.625  
Drive Cable Guide Bracket  
Auger Clutch Cable Bracket  
Cable Roller  
Hex Screw 1/4-28  
Frame Assembly  
Ball Bearing  
Bell Washer  
Lock Jam Nut  
Hex Flange Bearing  
Flat Washer†  
Front Support Guide Bracket  
Lock Hex Screw  
Bell Washer.340 ID x.872 OD  
Cotter Pin  
Flat Washer.536 ID x.930 OD  
Self-tapping Screw, 1/4-20 x 1.25  
Frame Shift Bracket  
Frame Cover  
Snap Ring  
Flat Washer.760 ID x.50 OD  
80 Tooth Gear  
Key  
7-Tooth Shaft  
Roll Pin  
Klik Pin  
DESCRIPTION  
Friction Wheel Assembly  
Friction Disc Wheel  
Wheel Shift Rod Assembly  
Self-tapping Screw, 1/4-20 x.5  
Spacer  
Friction Wheel Bracket Assembly  
Extension Spring  
Jam Nut 3/8-24  
710-1652  
784-5688  
784-5687A  
756-0625  
738-0924  
784-5630B  
741-0563  
736-0105  
712-0116  
27 684-0042C  
28 656-0012A  
29 684-0013B  
30 710-0599  
31 748-0190  
32 684-0021  
33 732-0264  
34 712-0711  
35 746-0898B  
36 738-0830  
37 790-00010  
38 735-0243B  
39 718-0301A  
40 618-0063A  
41 711-1364  
42 736-0142  
43 714-0507  
44 712-0703A  
45 790-00011  
46 734-1712A  
47 731-04043  
48 734-1525  
723-0430  
8
9
Drive Cable  
Axle 16” Wheels  
Friction Plate  
10 741-04026  
11 736-0188  
12 784-5689A  
13 710-0538  
14 736-0242  
15 714-0474  
16 736-0160  
17 710-0809  
18 784-5590  
19 784-5638A  
20 716-0102  
21 736-0351  
22 717-1445  
23 714-0126  
24 717-04094  
25 715-0249  
26 714-0143  
Friction Wheel Rubber  
Friction Wheel Hub  
Friction Wheel Bearing Assembly  
Clevis Pin, 1/4 x 1.3725  
Flat Washer,.281 x.5 x.063  
Cotter Pin,.75  
Insert Nut, 5/16-18  
Friction Plate  
Wheel Assembly Comp. 16 x 6.5  
Spacer  
Tire Only  
Tire Chain (Not Shown)  
Air Valve  
Rim Only  
Sleeve Bearing  
49 734-0255  
50 734-1711A  
51 741-0401  
† Use more than one washer on either side, only if necessary to reduce axle-play.  
4
17  
11  
9
16  
13  
8
15  
1
10  
14  
5
6
3
7
12  
3
2
REF.  
NO.  
PART  
NO.  
REF.  
NO.  
1
2
3
4
5
6
7
PART  
NO.  
DESCRIPTION  
Grease Plug  
Grease Seal  
Flat Washer.76 x 1.5 x.030  
Flat Washer.508 x 1.0 x.020  
Flat Washer.76 x 1.5 x.060  
Flange Bearing.75 x 1.0 x.59  
Flange Bearing.75 x 1.0 x.925  
Gearbox Ass’y. Complete 28"  
DESCRIPTION  
RH Reducer Housing  
LH Reducer Housing  
Hex Screw 1/4-20 x.75  
Spiral Axle 28"  
Key  
10 721-0325  
11 721-0327  
12 736-0351  
13 736-0369  
14 736-0445  
15 741-0662  
16 741-0663  
17 618-0122A  
618-0123  
618-0124  
710-0642  
711-0910A  
714-0161  
715-0143  
717-0528  
717-0526  
718-0186  
Spiral Pin  
Worm Gear, 20T  
Worm Shaft  
Thrust Collar  
8
9
NOTE: When rebuilding a gearbox assembly, include 1.5 oz. of Alvania EP Lead-Free Grease (Part No. 737-0168)  
21  
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52  
53  
Model H660G  
50  
3
9
4
46  
47  
1
2
11  
10  
43  
51  
45  
54  
14  
12  
44  
5
6
8
9
7
18  
20  
19  
55  
9
15  
27  
22  
21  
13  
13  
10  
18  
38  
25  
28  
13  
26  
9
30  
35  
41  
22  
36  
18  
33  
18  
9
37  
40  
34  
31  
40  
39  
16  
32  
39  
42  
DESCRIPTION  
REF.  
NO.  
1
2
3
4
5
6
7
PART  
NO.  
712-0116  
REF.  
NO.  
PART  
NO.  
DESCRIPTION  
Chute Clean-out Tool  
Lock Jam Nut 3/8-24  
Flat Idler  
Auger Idler Arm  
Hex Cap Screw 3/8-24 x 1.50  
Shoulder Screw  
Flat Washer,.565 x 1.25 x.02  
Extension Spring  
Hex Nut 5/16-18  
31 731-2643  
32 731-2635  
33 784-5582A  
34 741-0245  
35 684-0065  
36 715-0114  
37 712-0429  
38 605-5196A  
39 736-0188  
40 741-0493A  
41 605-5197A  
42 710-0890A  
43 746-0897  
44 714-0104  
45 736-0185  
46 684-0053B  
47 747-0737  
48 720-0201A  
49 726-0100  
50 705-5266  
51 710-3015  
52 712-0287  
53 736-0270  
54 741-0475  
55 714-0145  
756-0178  
784-5632B  
710-0459A  
738-0281  
736-0167  
732-0611  
712-3068  
712-3010  
Mount, Chute Clean-out Tool  
28” Shave Plate  
Hex Flange Bearing  
Impeller Assembly  
Pin  
Lock Nut 5/16-18  
Spiral 28” RH  
Flat Washer  
Flange Bushing  
Spiral 28” LH  
Shear Bolt 5/16-18 x 1.5  
Drive Cable  
Hairpin Clip  
Flat Washer  
Chute Crank Assembly  
Upper Chute Crank  
Chute Crank Knob  
Push Cap  
Chute Crank Bracket  
Hex Screw 1/4-20  
Hex Nut 1/4-20  
Bell Washer  
8
9
Hex Nut 5/16-18  
Lock Washer 5/16  
Housing  
10 736-0119  
11 05931A  
12 741-0309  
13 710-0451  
14 705-5226  
15 684-0041D  
16 784-5618  
18 736-0242  
19 741-0475  
20 784-5647  
21 731-1379C  
22 712-3027  
25 710-0703  
26 710-0726  
27 736-0169  
28 712-0798  
30 784-5580  
Ball Bearing  
Carriage Bolt 5/16-18 x.75  
Reinforcement Chute  
28” Housing Assembly  
Bearing Housing  
Bell Washer  
Bushing  
Chute Crank Bracket  
Chute Adapter  
Hex Flange Lock Nut 1/4-20  
Carriage Screw 1/4-20 x.75  
Screw 5/16-12  
Lock Washer 3/8  
Hex Nut 3/8-16  
Plastic Bushing  
Hairpin Clip  
Snow Shoe  
22  
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Model H660G  
1
IMPORTANT: For a properly working machine, use Factory Approved Parts.  
V-BELTS are specially designed to engage and disengage safely. A substitute  
(non OEM) V-Belt can be dangerous by not disengaging completely.  
27  
28  
2
3
5
4
8
26  
9
12  
15  
11  
10  
16  
19  
16  
7
16  
4
19  
6
16  
21  
22  
13  
14  
17  
25  
18  
23  
20  
20  
24  
REF.  
NO.  
PART  
NO.  
REF.  
NO.  
1
2
3
4
5
6
7
PART  
NO.  
DESCRIPTION  
Lock Jam Nut 3/8-16  
Pulley Half  
Bell Washer  
Flat Washer  
DESCRIPTION  
Hex Washer Screw 1/4-20 x.625  
Belt Cover  
Extension Spring  
Hex Screw 5/16-24 x.75  
Hex Cap Screw 3/8-16 x 1.25  
Drive Clutch Idler Bracket  
Shoulder Spacer  
15 712-0181  
16 756-0569  
17 736-0242  
18 736-0505  
19 754-0430B  
20 756-0967  
21 736-0247  
22 736-0331  
23 710-0696  
24 748-0360  
25 710-0654A  
26 629-0071  
27 710-0602  
28 732-0705  
710-1652  
731-1324  
732-0710  
710-0627  
710-3005  
05896A  
748-0234  
756-0987  
754-0346  
Belt  
Auger Pulley  
Flat Washer 3/8 x 1.25 OD  
Bell Washer  
Hex Cap Screw 3/8-24  
Pulley Adapter  
Hex Screw 3/8-16 x 1.0  
Extension Cord, Three-Prong  
Self Tapping Screw 5/16-18  
Cable Guide  
8
9
Pulley Half  
V-Belt  
Pulley Half  
10 756-0986  
11 736-0270  
12 710-0230  
13 756-0313  
14 710-1245B  
Bell Washer  
Hex Cap Screw 1/4-28 x.50  
Flat Idler  
Lock Hex Cap Screw 5/16-24  
23  
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MANUFACTURER’S LIMITED WARRANTY FOR:  
The limited warranty set forth below is given by MTD LLC with  
respect to new merchandise purchased and used in the  
United States, its possessions and territories.  
d.  
MTD does not extend any warranty for products sold or  
exported outside of the United States, its possessions  
and territories, except those sold through MTD’s  
authorized channels of export distribution.  
Replacement parts that are not genuine MTD parts.  
Service completed by someone other than an  
authorized service dealer.  
“MTD”warrants this product against defects in material and  
workmanship for a period of two (2) years commencing on the  
date of original purchase and will, at its option, repair or  
replace, free of charge, any part found to be defective in  
materials or workmanship. This limited warranty shall only  
apply if this product has been operated and maintained in  
accordance with the Operator’s Manual furnished with the  
product, and has not been subject to misuse, abuse,  
commercial use, neglect, accident, improper maintenance,  
alteration, vandalism, theft, fire, water, or damage because of  
other peril or natural disaster. Damage resulting from the  
installation or use of any part, accessory or attachment not  
approved by MTD for use with the product(s) covered by this  
manual will void your warranty as to any resulting damage.  
e.  
f.  
g.  
Transportation charges and service calls.  
No implied warranty, including any implied warranty of  
merchantability of fitness for a particular purpose,  
applies after the applicable period of express written  
warranty above as to the parts as identified. No other  
express warranty, whether written or oral, except as  
mentioned above, given by any person or entity,  
including a dealer or retailer, with respect to any product,  
shall bind MTD. During the period of the warranty, the  
exclusive remedy is repair or replacement of the product  
as set forth above.  
Normal wear parts or components thereof are subject to  
separate terms as follows: All normal wear parts or  
component failures will be covered on the product for a period  
of 90 days regardless of cause. After 90 days, but within the  
two year period, normal wear part failures will be covered  
ONLY IF caused by defects in materials or workmanship of  
OTHER component parts. Normal wear parts and  
components include, but are not limited to: batteries, belts,  
blades, blade adapters, grass bags, rider deck wheels, seats,  
snow thrower skid shoes, shave plates, auger spiral rubber,  
and tires.  
The provisions as set forth in this warranty provide the  
sole and exclusive remedy arising from the sale. MTD  
shall not be liable for incidental or consequential loss or  
damage including, without limitation, expenses incurred  
for substitute or replacement lawn care services or for  
rental expenses to temporarily replace a warranted  
product.  
Some states do not allow the exclusion or limitation of  
incidental or consequential damages, or limitations on how  
long an implied warranty lasts, so the above exclusions or  
limitations may not apply to you.  
HOW TO OBTAIN SERVICE: Warranty service is available,  
WITH PROOF OF PURCHASE, through your local authorized  
service dealer. To locate the dealer in your area, check your  
Yellow Pages, or contact MTD LLC at P.O. Box 361131,  
Cleveland, Ohio 44136-0019, or call 1-800-800-7310 or 1-  
330-220-4683 or log on to our Web site at  
In no event shall recovery of any kind be greater than the  
amount of the purchase price of the product sold. Alteration  
of safety features of the product shall void this warranty.  
You assume the risk and liability for loss, damage, or injury to  
you and your property and/or to others and their property  
arising out of the misuse or inability to use the product.  
This limited warranty does not provide coverage in the  
following cases:  
This limited warranty shall not extend to anyone other than the  
original purchaser or to the person for whom it was purchased  
as a gift.  
a.  
The engine or component parts thereof. These items  
may carry a separate manufacturer’s warranty. Refer  
to applicable manufacturer’s warranty for terms and  
conditions.  
HOW STATE LAW RELATES TO THIS WARRANTY: This  
limited warranty gives you specific legal rights, and you may  
also have other rights which vary from state to state.  
b.  
c.  
Log splitter pumps, valves, and cylinders have a  
separate one year warranty.  
Routine maintenance items such as lubricants, filters,  
blade sharpening, tune-ups, brake adjustments, clutch  
adjustments, deck adjustments, and normal  
deterioration of the exterior finish due to use or  
exposure.  
IMPORTANT: Owner must present Original Proof of Purchase to obtain warranty coverage.  
MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019; Phone: 1-800-800-7310, 1-330-220-4683  
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