MTD H660G Benutzerhandbuch

14

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 

hours of operation. The cams can be accessed beneath 
the handle panel. Use a multi-purpose automotive 
grease.

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. 

Refer to the separate engine manual packed with your 
unit for all engine maintenance procedures.

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.

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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).

 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.

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. 

•

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.

•

To remove shave plate, remove carriage bolts, bell 
washers and hex nuts which attach it to the snow 
thrower housing. 

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Reassemble new shave plate, making sure heads 
of the carriage bolts are to the inside of the housing. 
Tighten securely.

Disconnect the spark plug wire

from the spark plug and ground.

•

Remove the plastic belt cover on the front of the 
engine by removing the two self-tapping screws. 
See Figure 20.

•

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.