Craftsman PRO Series Operator's Manual page 25

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 37.
Remove Hex Screw
and 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 loose 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.
See Figure 38. Discard old friction wheel.
8. Reassemble the new friction wheel onto the hub assembly, tightening
the four screws in rotation and with equal force (6-9 ft-lb of torque). 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 39.
SERVICE AND MAINTENANCE
Friction Wheel
Assembly
Slide Hex
Shaft Out
Right Side
Figure 37
Figure 38
10. Slide the hex shaft through the right side of the frame toward the left side
and through the friction wheel assembly.
11. Ensure 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 onto 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 removed in Step 5 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 in Step 4 , and insert the screw into the threaded hole of the hex
shaft.
16. Using a 3/4" wrench, hold the hex shaft and 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. Position the snow thrower to normal operating position.
IMPORTANT: Repeat the Drive Control Test on page 12 from the Assembly section
of this manual before operating the snow thrower.
25
Figure 39