MTD 600 Series Operator's Manual page 23

10. After replacing auger belt, perform
Auger Control test in Assembly & Set-Up
section (page 15).
Drive Belt
NOTE:
See your authorized service dealer to
have drive belt replaced or contact Customer
Support.
Friction Wheel Inspection
(Steerable 500 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 4-20.
Figure 4-20
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 4-21.
NOTE: Be careful not to damage threads
on shaft.
Figure 4-21
6. Carefully position hex shaft downward
and to left before carefully sliding
friction wheel assembly off shaft.
See Figure 4-22.
NOTE: If you're replacing friction wheel
assembly as a whole, discard the worn
part and slide new part onto hex shaft.
Figure 4-22
7. Follow previous steps in reverse order to
reassemble components.
8. Perform Drive Control Lever test shown
on page 18.
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 4-23.
2. Remove rubber ring from between the
plates.
Ball
3. Reassemble side plates with a new
Bearing
rubber ring.
NOTE: When reassembling friction
(a)
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
18.
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 17.
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.
(a)
(a)
(a)
(a)
Figure 4-23
S 4 — S 23
ection ervice