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22 Section 7 — Service
6. If replacing the entire assembly, put the new friction wheel
assembly in place and follow the steps in reverse to re-
assemble. Repeat the drive control test on page 18.
If you only want to replace the friction wheel rubber,
continue with step 7.
NOTE: Make sure to install the gear shaft through the
sprocket shown in Figure 7-7. If the sprocket fell from
the snow thrower while removing the hex shaft, place
the sprocket on the hex shaft. Position the hex hub of
the sprocket toward the friction wheel when sliding the
sprocket onto the shaft. See Figure 7-7.
7. Remove the four screws from the friction wheel assembly.
See Figure 7-10.
Screws
Side Plates
Rubber
Ring
Figure 7-10
8. Remove the friction wheel rubber from between the
friction wheel plates.
9. Reassemble new friction wheel rubber to the friction wheel
plates and hub, tightening the four screws in rotation and
with equal force (between 6 ft.-lbs. and 9 ft.-lbs.).
NOTE: When reassembling the friction wheel assembly,
make sure that the rubber ring is centered and seated
properly between the side plates. Tighten each screw
only one rotation before turning the wheel clockwise
and proceeding with the next screw. Repeat this process
several times to ensure the plates are secured with equal
force (between 6 ft-lbs and 9 ft-lbs).
NOTE: Make sure the shift lever pin is in place in the
bearing housing. See Figure 7-9 inset.
10. Position the friction wheel assembly up onto the pin of
the shift rod assembly, and slide the shaft through the
assembly. See Figure 7-9. Reassemble in reverse order.
NOTE: Make sure to install the gear shaft through the
sprocket shown in Figure 7-7. If the sprocket fell from
the snow thrower while removing the hex shaft, place
the sprocket on the hex shaft. Position the hex hub of
the sprocket toward the friction wheel when sliding the
sprocket onto the shaft. See Figure 7-7.
11. Repeat the drive control test on page 18.
Replacing Shear Pins
The augers are secured to the spiral shaft with shear pins and
bow-tie cotter pins. If the auger should strike a foreign object or
ice jam, the snow thrower is designed so that the pins may shear.
If the augers will not turn, check to see if the pins have sheared.
See Figure 7-11.
Figure 7-11
CAUTION: NEVER replace the auger shear pins
with anything other than OEM Part No. 738-04124A
replacement shear pins. Any damage to the auger
gearbox or other components as a result of failing to
do so will NOT be covered by your snow thrower’s
warranty.
WARNING! Always turn off the snow thrower’s
engine and remove the key prior to replacing shear
pins.