Craftsman 247.881720 Operator's Manual page 23

NOTE: Be careful not to damage the threads on the shaft.
7. Carefully position the hex shaft downward and to the left before
carefully sliding the friction wheel assembly off the shaft. See
Figure 31.
NOTE: If you're replacing the friction wheel assembly as a whole,
discard the worn part and slide the new part onto the hex shaft.
8. Follow the steps above in reverse order to reassemble
components.
9. Perform the test previously described in the Drive Control
section.
If you're disassembling the friction wheel and replacing only the rubber
ring, proceed as follows:
1. Remove the four screws which secure the friction wheel's side
plates together. See Figure 32.
2. Remove the rubber ring from between the plates.
3. Reassemble the side plates with a new rubber ring.
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).
4. Slide the friction wheel assembly back onto the hex shaft and
follow the steps above in reverse order to reassemble
components.
5. Perform the test previously described in the Drive Control
section.
SERVICE AND MAINTENANCE
23
Figure 31
Figure 32