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Traction Drive Systems
3 - 2 Two Stage Snowthrower Drive Systems Manual
TROUBLESHOOTING THE TRACTION
DRIVE — ALL MODELS
Drive slipping:
1. Verify adjustment of traction drive linkage.
2. Make sure the engagement spring and idler spring
are in place and undamaged.
3. Verify that the drive plate and friction wheel are
clean and free of grease or oil. Clean with alcohol
or something that does not leave a residue.
4. Replace the friction wheel if worn.
DISASSEMBLY — TORO MODELS 38065,
38080, 38085
These models work as previously described in the
Introduction, except there is a separate drive plate for
reverse. When the shift lever is pulled into reverse, the
friction wheel is pulled to the rear until it contacts the
small reverse plate. The drive will then operate in
reverse (Figure 71).
Figure 71
2768-024
The most convenient method of working on the traction
drive is to stand the machine up on the auger.
1. Drain both fuel and oil from the engine.
2. Stand the machine up on its auger and secure to
prevent tipping (Figure 72).
Figure 72
2768-027
3. Remove 4 self-tapping screws securing the lower
shield.
4. Remove the klik pins and both wheels.
5. Each end of the axle is supported by a bearing
which is attached to the chassis by two thread
forming screws. At minimum, the screws must be
removed from the bearing on the left side in order
to remove the axle. The right side axle bearing
can also be removed (Figure 73).
Figure 73
2768-026
R
F
N
6
5
4
1
2
3
1
.
R
everse p
l
a
t
e
2. Friction wheel
3. Forward plate
4. Rubber wheel
up = reverse
5
.
R
u
bb
er w
h
ee
l
i
n
middle = neutral
6. Rubber wheel
down = forward
1
1
.
B
ear
i
ng