Servicing Your Snow Thrower - Yard-Man 31AH553G401 Operator's Manual

SECTION 7: SERVICING YOUR SNOW THROWER
WARNING: Disconnect spark plug wire and
ground against engine before performing
any repairs or maintenance.
Augers
The augers are secured to the spiral shaft with two
shear bolts and hex lock nuts. See Figure 13. If you hit
a foreign object or ice jam, the snow thrower is so
designed that the bolts will shear.
• If the augers do not turn, check to see if the bolts
have sheared and replace if necessary. Two
replacement shear bolts (shown in Figure 13 inset)
and hex lock nuts have been provided with the
snow thrower. Please note that lock nuts cannot be
threaded onto a bolt by hand. This type of nut is
used where vibration occurs. So you will have to
use a set of wrenches to tighten these hardware.
When replacing bolts, spray an oil lubricant into
shaft before inserting new bolts.
Auger Auger
Shear Bolt
Figure 13
Shave Plate and Slide Shoes
The shave plate and slide shoes on the bottom of the
snow thrower are subject to wear. They should be
checked periodically and replaced when necessary.
• Remove the four carriage bolts, Belleville washers
and hex nuts which attach slide shoes to the snow
thrower on two sides. See Figure 14.
• Reassemble new slide shoes with the hardware
removed earlier (cupped side of Belleville washer
goes against slide shoes). Make certain the slide
shoes are adjusted to be level.
• To remove shave plate, remove slide shoe and the
associated hardware including carriage bolts,
Belleville washers and hex nuts which attach
shave plate to the snow thrower housing. For
location of shave plate and carriage bolts, see
Figure 14.
• Reassemble new shave plate, making sure heads
of the carriage bolts are to the inside of the housing.
See Figure 14.
• Reinstall slide shoe. Tighten securely.
Shave
Plate
Bell
Washer
Hex Lock
Replacing belt
Nut
Auger Belts
• Remove the plastic belt cover on the front of the
engine by removing the two self-tapping screws.
See Figure 15.
Self-Tapping
Screw
Auger Housing
• Remove the three hex nuts and lock washers which
attach the auger housing assembly to the frame
assembly on each side. See Figure 16.
15
Carriage
Bolt
Auger Housing
Hex Nut
Shave Plate Carriage Bolt
Figure 14
WARNING: Disconnect the spark plug wire
from the spark plug and ground.
Figure 15
Engine
Self-Tapping
Screw
Belt Cover