MTD H660G - Manual (Page 14)

14
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
hours of operation. The cams can be accessed beneath
the handle panel. Use a multi-purpose automotive
grease.
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.
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.
• 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).
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.
Shave Plate and Skid Shoes
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.
Figure 19
• 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.
Belt Replacement
WARNING: Disconnect the spark plug wire
from the spark plug and ground.
Auger Belts
• 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.
Carriage Skid Shoe
Hex Nuts
Shave Plate
Bolts
Skid Shoe