Troy-Bilt 31AH7T74063 ユーザーズマニュアル
14
SECTION 7: SERVICING YOUR SNOW THROWER
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.
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.
Augers
•
The augers are secured to the spiral shaft with two
shear bolts and hex lock nuts. If you hit a hard
foreign object or ice jam, the snow thrower is
designed so that the bolts may shear.
Refer to Figure 14.
shear bolts and hex lock nuts. If you hit a hard
foreign object or ice jam, the snow thrower is
designed so that the bolts may shear.
Refer to Figure 14.
•
If the augers will not turn, check to see if the bolts
have sheared. Replacement shear bolts and hex
lock nuts have been provided with the snow
thrower. When replacing bolts, spray an oil
lubricant into shaft before inserting new bolts.
have sheared. Replacement shear bolts and hex
lock nuts have been provided with the snow
thrower. When replacing bolts, spray an oil
lubricant into shaft before inserting new bolts.
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.
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.
the snow thrower are subject to wear. They should
be checked periodically and replaced when
necessary.
•
Remove the six carriage bolts, belleville washers
and hex nuts which attach two skid shoes to the
snow thrower on two sides. See Figure 12.
and hex nuts which attach two skid shoes to the
snow thrower on two sides. See Figure 12.
•
Reassemble new skid shoes with the hardware
removed earlier (cupped side of belleville washer
against the skid shoes). Make certain the skid
shoes are adjusted to be level.
removed earlier (cupped side of belleville washer
against the skid shoes). Make certain the skid
shoes are adjusted to be level.
•
To remove the shave plate, remove the carriage
bolts, belleville washers and hex nuts which attach
the shave plate to the snow thrower housing. See
Figure 15.
bolts, belleville washers and hex nuts which attach
the shave plate to the snow thrower housing. See
Figure 15.
•
Reassemble the new shave plate, with heads of
carriage bolts to the inside of the housing. Tighten
securely.
carriage bolts to the inside of the housing. Tighten
securely.
Figure 15
Belt Removal And Replacement
Auger Belts
NOTE: It is necessary to remove both belts in order to
change either one. If changing just one belt, be certain
to check the condition of the other belt.
change either one. If changing just one belt, be certain
to check the condition of the other belt.
•
Disconnect the chute crank assembly at the
discharge chute end by removing the hairpin clip
and the flat washer. See Figure 16A.
discharge chute end by removing the hairpin clip
and the flat washer. See Figure 16A.
•
Remove the engine shroud by removing the lock
nuts and bolts securing it. See Figure 16B.
nuts and bolts securing it. See Figure 16B.
•
Remove the plastic belt cover at the front of the
engine by removing the two self-tapping screws.
See Figure 16B.
engine by removing the two self-tapping screws.
See Figure 16B.
•
Drain the gasoline from the snow thrower, or place
a piece of plastic film under the gas cap.
a piece of plastic film under the gas cap.
•
Tip the snow thrower up and forward so that it rests
on its auger housing. Refer to Figure 9.
on its auger housing. Refer to Figure 9.
Shear Bolts
Carriage
Hex Nut
Washer
Shave
Bolt
Plate