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21Section 7 — Service
9. Reposition the friction wheel assembly in the snow thrower
frame. Insert the pin from the shift arm assembly into the
friction wheel assembly and hold assembly in position.
Refer to Figure 7-12.
Figure 7-12
10. Slide the hex shaft through the right side of the frame
toward the left side and through the friction wheel
assembly.
NOTE: If the sprocket fell from the snow thrower chain while
removing the hex shaft, position the hex hub of the sprocket
toward the friction wheel and place the sprocket in the chain.
11. After making certain that the chain is on both the large
and the small sprocket, align the hex shaft with the hex
hub of the small sprocket, and slide the shaft through the
sprocket.
12. Slide the spacer onto the end of the hex shaft.
13. Align the bearing on the right end of the hex shaft with the
hole in the right side of the frame, then push the hex shaft
to the left into position in the frame.
14. Slide the bearing onto the left end of the hex shaft and
press into the hole on the left side the frame.
15. Place the belleville washer (rounded side toward head)
onto the hex screw removed earlier, and insert the screw
into the threaded hole of the hex shaft.
16. Gradually tighten the hex screw to fully seat the bearings in
each side of the frame and to secure the hex shaft.
17. Position the frame cover on the bottom of the frame and
secure with the self-tapping screws. Pivot the snow thrower
down to its normal operating position.
5. Holding the friction wheel assembly, slide the hex shaft out
of the right side of the frame. The spacer on the left side
of the hex shaft will fall and the sprocket should remain
hanging lose in the chain.
6. Lift the friction wheel assembly out between the axle shaft
and the drive shaft assemblies.
7. Remove four screws securing the friction wheel to the hub
assembly (refer to Figure 7-11). Discard old friction wheel.
Figure 7-11
8. Reassemble the new friction wheel onto the hub assembly,
tightening the four screws in rotation and with equal force.
It is important to assemble the friction wheel symmetrically
for proper functioning. Refer to Figure 7-11.