Service Manual

7-6
WPM Drive Systems Manual
WHEELPINIONCLUTCH
12. Place the wheel pinion key in the groove on the
output shaft with the leg toward the clutch washer.
Note: Thereisaleftandarightwheelpinionkey.
Youareusingthecorrectkeyif,whenplaced
inthegroove,thetopofthekeyisatandthe
straightportionofthelegisperpendicularto
theshaft.
Before assembling further, rotate the clutch washer
back and forth slightly, making sure that the key
actuates properly (Fig. 172).
5. To increase service life, make sure all parts are
clean prior to assembly and coated with new grease.
6. If removed, install a new O-ring in the innermost
groove 2-1/4” (5.7cm) in from the end on each
output shaft, making sure that it is fully seated in the
groove. Refer to Figure 171 above. Not all models
use an O-ring.
7. Slip the end cap onto the output shaft, but do not
fasten at this time.
8. Slide the pivot arm and spring arm assembly onto
the output shaft, boss rst.
Note: Theconvexsideofthespringarmrivetand
theconcavesideoftheknobonthespring
armshouldbothbefacingthehousing.
9. Slide the externally tabbed thrust washer and the
internally tabbed thrust washer onto the output shaft.
Make sure that the tab on the internally tabbed thrust
washer enters the keyway. Secure with the special
retaining clip. Make sure that the center tab ts
properly into the keyway. This will prevent rotation of
the clip on the output shaft.
10. Place the friction ring into the groove on the pivot
arm, at side out.
11. Slide the clutch washer onto the shaft so that the
recesses for the key are facing out.
Fig172 3428-0028