21Section 4 — Service
Friction Wheel Inspection
(Steerable 500 series and 800 series & Non-
Steerable Single Speed 600 series)
If unit fails to drive with drive control lever
engaged, and performing drive control cable
adjustment fails to correct problem, the friction
wheel may need to be replaced.
NOTE: Special tools are required and several
components must be removed in order to
replace the unit’s friction wheel rubber. See your
authorized service dealer to have friction wheel
rubber replaced or contact Customer Support.
To inspect friction wheel, proceed as follows:
1. Allow engine to run until it is out of fuel.
Do not attempt to pour fuel from engine.
2. Carefully pivot unit up and forward so that
it rests on auger housing.
3. Remove frame cover from underside of
unit by removing four self-tapping screws
which secure it. See Figure 4-4.
4. Inspect friction wheel for signs of wear or
cracking.
Friction Wheel Removal
(Multi-Speed Non-Steerable 600 Series)
If unit fails to drive with drive control lever
engaged, and performing drive control cable
adjustment fails to correct the problem, friction
wheel may need to be replaced. Follow the
instructions below. Examine friction wheel
for signs of wear or cracking and replace if
necessary.
1. Allow engine to run until it is out of fuel.
Do not attempt to pour fuel from engine.
2. Place shift lever in first Forward (F1)
position.
3. Carefully pivot unit up and forward so that
it rests on auger housing.
4. Remove frame cover from underside of
unit by removing self-tapping screws
which secure it. See Figure 4-4. Remove
right-hand wheel by removing screw and
bell washer which secure it to axle. See
Figure 4-19.
Figure 4-19
5. Carefully remove hex nut (a) which
secures hex shaft to equipment frame
and lightly tap the shaft’s end to dislodge
ball bearing from right side of frame. See
Figure 4-20.
NOTE: Be careful not to damage threads
on shaft.
Figure 4-20
6. Carefully position hex shaft downward
and to left before carefully sliding friction
wheel assembly off shaft.
See Figure 4-21.
NOTE: If you’re replacing friction wheel
assembly as a whole, discard the worn
part and slide new part onto hex shaft.
Figure 4-21
7. Follow previous steps in reverse order to
reassemble components.
8. Perform Drive Control Lever test shown on
page 19.
NOTE: Make sure shift lever pin is in place in
bearing housing. See Figure 4-20 inset.
If you’re disassembling friction wheel and
replacing only rubber ring, proceed as follows:
NOTE: Not all friction wheels are serviceable.
If this is the case, simply replace friction wheel
assembly.
1. Remove four screws (a) which secure
friction wheel’s side plates together.
See Figure 4-22.
Figure 4-22
2. Remove rubber ring from between the
plates.
3. Reassemble side plates with a new rubber
ring.
NOTE: When reassembling friction wheel
assembly, make sure that rubber ring is
centered and seated properly between
the side plates. Tighten each screw
only one rotation before turning wheel
clockwise and proceeding with next
screw. Repeat this process several times to
ensure plates are secured with equal force
(between 145-115 in-lbs).
NOTE: Make sure shift lever pin is in place
in bearing housing. See Figure 4-21 inset.
4. Slide friction wheel assembly back onto
hex shaft and follow the steps above in
reverse order to reassemble components.
5. After replacing friction wheel, perform
Drive Control Lever test shown on page 19.
Off-Season Storage
If the unit will not be used for 30 days or longer,
follow the storage instructions below.
1. Run engine until fuel tank is empty and it
stops due to lack of fuel. Do not attempt
to pour fuel from engine.
NOTE: Refer to Engine Operator’s Manual
for information on storing your engine.
2. Lubricate machine as instructed on
page 18.
3. Store in a clean, dry area.
4. If storing unit in an unventilated area,
rustproof machine using a light oil or
silicone to coat the snow thrower.
5. Clean the exterior of the engine and the
snow thrower.
IMPORTANT: When storing unit or when it
is not being serviced, it is to remain in the
operating position with both wheels and
auger housing on the ground.
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