4.
Using a 3/4" wrench, hold the hex shaft and remove the hex screw and
belleville washer and bearing from left side of the frame. Refer to Figure 38.
Remove Hex Screw
Belleville Washer
Hex Shaft
5.
Holding the friction wheel assembly, slide the hex shaft out of the friction
wheel assembly and 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 39). Discard old friction wheel.
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.
9.
Reposition the friction wheel assembly in the snow thrower frame. Insert the
pin from the speed selector arm assembly into the friction wheel assembly
and hold assembly in position. Refer to Figure 40.
SERVICE AND MAINTENANCE
Friction Wheel Ass'y.
Slide Hex
Shaft Out
Right Side
Figure 38
Figure 39
10.
Slide the hex shaft through the right side of the frame toward the left side
and through the friction wheel assembly.
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.
NOTE: If the sprocket fell from the snow thrower while removing the hex
shaft, place the sprocket on the chain. Realign the sprocket on the chain with
the hex hub facing the right side of unit. Position the hex hub of the sprocket
toward the friction wheel when sliding the sprocket on to the hex shaft.
12.
Slide the spacer onto the end of the hex shaft.
Note: The spacer is to be placed on the hex shaft between the sprocket and
bearing previously removed on the left side of the frame.
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 it
normal operating position.
IMPORTANT: Repeat the drive control test from the Assembly section of this manual
before operating the snow thrower.
25
Figure 40