Craftsman 247.88790 Owner's Manual page 18

Friction Wheel Rubber
1. Check the rubber on the friction wheel after 25
hours of operation, and periodically thereafter.
Replace the rubber if any signs of wear or cracking
are found.
2. Drain the gasoline from the snow thrower, or place
a piece of plastic under the gas cap. Move shift
lever to the R2 position.
3. Tip the snow thrower so that it rests on the housing.
Remove the self-tapping screws from the frame
cover underneath the snow thrower.
4. Remove bolt securing the right wheel, and remove
the wheel from the axle.
5. Remove the four screws securing the right drive
cover to the frame. Remove the drive cover from
the side of the frame. See Figure 19.
Figure 19
6. Holding the friction wheel assembly, slide the hex
gear shaft to the right. See Figure 20. The spacer
on right side of hex shaft may fall.
Bearing
Sprocket
Figure 20
7. Lift the friction wheel assembly out between the
axle shaft and the drive shaft assemblies.
8. Remove the four screws from the friction wheel
assembly. Remove friction wheel rubber from
between the friction wheel plate. See Figure 21.
Friction
Wheel
9. Reassemble new friction wheel rubber to the
IMPORTANT:
equally for proper functioning.
10. Insert the shift arm assembly into the friction wheel
11. Slide hex gear shaft through right side of the
Drive Cover
12. Insert the hex gear shaft through the sprocket and
Bolt
NOTE: If the sprocket fell from the snow thrower while
removing the hex gear shaft, place the sprocket on the
hex gear shaft. Position the hex hub of the sprocket
toward the friction wheel when sliding the sprocket on
to hex gear shaft.
Spacer
13. Align the hex gear shaft with the left bearing and
14. Install the right bearing on the hex gear shaft and
15. Reassemble the drive cover with four screws
16. Reassemble the frame cover with the self-tapping
NOTE: If you placed plastic under the gas cap, be
certain to remove it.
18
Rubber
Figure 21
friction wheel assembly, tightening the four screws
in rotation and with equal force. See Figure 21.
Assemble the rubber on the friction wheel
assembly and hold assembly in position. See
Figure 22.
housing and the friction wheel assembly.
the spacer. Make certain that chain engages both
the large and the small sprocket.
carefully guide this bearing into left side of housing.
check that the spacer and bearing in the drive cover
are aligned to the steerable shaft. See Figure 22.
Shift
Arm
Figure 22
removed in step 5. Install the right wheel with the
bolt removed earlier.
screws. Flip the equipment back to the operating
position and re-attach the belt cover.
Plate
Screw
Friction
Wheel
Hex
Gear Shaft