Yard-Man 31AE553F401 User Manual
Page 13
13
SECTION 10: MAINTENANCE
WARNING: Disconnect the spark plug wire and
ground against the engine before performing any
repairs or maintenance.
AUGERS
The augers are secured to the spiral 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 bolts will shear. Lock nuts cannot be
threaded onto a bolt by hand. This type of nut is
used where vibration occurs.
If the augers do not turn, check to see if the bolts
have sheared. Two replacement shear bolts (shown
in inset here) and hex lock nuts have been provided
with the snow thrower. When replacing bolts, spray
an oil lubricant into shaft before inserting new bolts.
Figure 14
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.
Figure 15
1.
Remove the four carriage bolts, belleville
washers and hex nuts which attach skid shoes to
the snow thrower on two sides. See Figure 15.
2.
Reassemble new skid shoes with the four
carriage bolts, belleville washers (cupped side
goes against skid shoes) and hex nuts. Make
certain the skid shoes are adjusted to be level.
3.
To remove shave plate, remove the skid shoe
and the rest of hardware including carriage bolts,
belleville washers and hex nuts which attach
shave plate to the snow thrower housing. For
location of shave plate, see Figure 14.
4.
Reassemble new shave plate, making sure heads
of the carriage bolts are to the inside of the
housing. Reinstall skid shoe. Tighten securely.
REPLACING BELT
WARNING
:
Disconnect the spark plug
wire from the spark plug and ground.
Auger Belts
1.
Remove the plastic belt cover on the front of the
engine by removing the two self-tapping screws.
See Figure 16.
Figure 16
2.
Disconnect chute crank assembly at the
discharge chute by removing the hairpin clip and
the two flat washers. See Figure 17.
Figure 17
3.
Remove the six hex nuts and lock washers
which attach the auger housing assembly to the
frame assembly. See Figure 18.
Shave Plate
Shear Bolt
Shear Bolt
Skid
Shoe
Carriage
Bolt
Remove
belt
cover
Remove hairpin clip,
flat washer
Remove hairpin
clip, flat washer