Troy-Bilt 769-04090 - Manual (Page 16)

16
6
Maintaining
Your Snow
Thrower
WARNING
Before lubricating,
repairing or
inspecting, disengage
all controls and stop
engine. Wait until all
moving parts have
come to a complete
stop. Remove the
safety key to prevent
unintended firing of
the engine.
IMPORTANT
Avoid oil spillage on
rubber friction wheel
and aluminum drive
plate.
Figure 6-1
Figure 6-2
Lubrication
Drive and Shifting Mechanism
At least once a season or after every 25 hours of opera-
tion, remove rear cover. Lubricate any chains, sprockets,
gears, bearings, shafts, and the shifting mechanism at
least once a season. Use engine oil or a spray lubricant.
Refer to Figure 6-1.
IMPORTANT: Keep all grease and oil off the rubber
friction wheel and drive plate.
Wheels
At least once a season, remove wheels. Clean and coat
the axles with a multipurpose automotive grease before
reinstalling wheels.
Auger Shaft
At least once a season, remove the shear pins on auger
shaft. Spray lubricant inside shaft, around the spacers.
Also lubricate the flange bearings found at either end of
the shaft. See Figure 6-2.
Augers
• The augers are secured to the spiral shaft with shear
pins and cotter pins. If the auger should strike a
foreign object or ice jam, the snow thrower is designed
so that the pins may shear. See Figure 6-2.
• If the augers will not turn, check to see if the pins have
sheared. Replacement shear pins have been provided
with the snow thrower. When replacing pins, spray an
oil lubricant into shaft before inserting new pins.
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:
1. Remove the carriage bolts (and washers if
equipped)and hex flange nuts which secure the skid
shoes to the snow thrower.
2. Reassemble new skid shoes with previously removed
hardware. Refer to Figure 6-3.
To remove shave plate:
1. Remove the carriage bolts and hex nuts which attach
it and the skid shoes to the snow thrower housing.
2. Reassemble new shave plate, making sure heads of
carriage bolts are to the inside of housing. Tighten
securely.
Replacing Belts
To remove and replace either the auger belt or the drive
belt, follow the steps below and then proceed to the
specific steps listed under respective sub-headings.
1. Disconnect the chute crank assembly at the discharge
chute end by removing the hairpin clip and the flat
washer. See Figure 6-8.
Figure 6-3
Shear Pin Vent Plug Grease
Fitting (optional)
Bearing Spacers Cotter Pin
Auger Shaft
Engine
Refer to the separate engine manual packed with your
unit for all engine maintenance and lubrication instruc-
tions.
Friction
Wheel
Drive
Plate
Gear
(Hex)
Shaft