Craftsman 247.88970 Operator's Manual page 23

.
Carefullyremovethe hexnut and washerwhich securesthehex
shaftto the snowthrowerframeand lightlytap the shaft'send
to dislodgethe ball bearingfrom the rightsideof the frame.See
Figure30.
NOTE:Be carefulnot to damagethe threadson the shaft.
7. Carefullypositionthe hexshaftdownwardand to the left before
carefullyslidingthe frictionwheelassemblyoff the shaft. See
Figure31.
NOTE: If you'rereplacingthe frictionwheelassemblyas a whole,
discardthe wornpartand slidethe newpart ontothe hexshaft.
Followthe stepsabovein reverseorder to reassemblecomponents.If
you'redisassembling the frictionwheeland replacingonly the rubber
ring,proceedas follows:
1. Removethefour screwswhich securethe frictionwheel'sside
platestogether. See Figure32.
2. Removethe rubberring from betweenthe plates.
3. Reassemble the side plateswith a newrubberring.
Figure30
NOTE: Whenreassembling the frictionwheelassembly,makesure
that the rubberring is centeredand seatedproperlybetweenthe side
plates.Tighteneachscrewonlyone rotationbeforeturningthe wheel
clockwiseand proceedingwith the next screw.Repeatthis process
severaltimes toensurethe platesare securedwith equalforce
(between6 ft-lbsand 9 ft-lbs).
4. Slide the frictionwheelassemblybackonto the hexshaftand
follow thestepsabovein reverseorder to reassemble
components.
5. Performthe DriveControlTestoutlinedearlierin the Serviceand
Maintenance section.
Figure31
Figure32
23