Service Manual

Rear HOC and WPC Disassembly (cont'd)
Figure 55
7. If further disassembly of the pivot arm is required,
remove the spring arm.
8. Press the needle bearing and the oil
impregnated bushing from the pivot arm using
an arbor press.
9. Removal of the grease fitting is not
recommended because
it is pressed in.
However, if damaged or lost, we suggest tapping
and installing a threaded grease fitting.
10. If the spring arm knob requires replacement,
push
in on the detent tab, then pull the knob
straight
off.
NOTE: The detent rivet is not replaceable
separately.
Rear HOC
and WPC Assembly
1.
2.
3.
4.
5.
6.
If the grease fitting in the pivot arm has been
damaged or lost, tap and replace with a threaded
fitting.
Pack the caged needle bearing with grease then
press into the outside of the pivot arm until
it is
flush with the groove that houses
the externally
tabbed thrust washer.
Press the oil impregnated bushing into the boss
on the pivot arm until
it is flush with the face of
the boss. See Figure
56.
If spring arm disassembly was required, install
the knob making sure that the detent is pressed
out about 1.5 mm
(.060'”). Install the spring arm
knob
so that the concave side of the knob and
the convex side
of the rivet align.
Assemble the spring arm and pivot arm as shown
in Figure 58.
To increase service life, make sure all parts are
clean prior to assembly and coated with new
grease.
Self-Propel System
40
_-
Figure 56
7. If removed, install new O-rings in the innermost
groove
5.7 cm (2-1/4”) in from end on each end,
making sure that
it is fully seated in the groove.
See Figure
58.
8. Slip the end cap onto the output shaft but do not
9. Slide the pivot arm and spring arm assembly
onto the output shaft, boss first.
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.
10. 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 follows the contour
of the
keyway.) Secure with the special retaining clip,
making sure that the center tab
fits properly into
the keyway. This will prevent rotation of the clip
on the output shaft.
fasten at this time.
11. Place the friction ring into the groove on the pivot
arm, flat side out.
12. Slide the clutch washer onto the shaft so that the
recesses for the key are facing out.
13. 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 flat 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. See Figure
57.
Vacu-Power Mower
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