170
HDX278A
5. Remove the propeller shaft from the rear gear case.
Account for the boot and boot O-rings.
HDX279
6. Remove the gear case through the furthest rear open-
ing of the frame and lift out the top.
HDX280
RING GEAR/THRUST BUTTON
Removing
1. Remove the cap screws securing the gear case cover
to the gear case; then remove the ring gear.
2. Remove the thrust button from the gear case cover
(left-hand threads). Account for a shim.
Inspecting
1. Inspect the ring gear for excessive wear, missing or
chipped teeth, or discoloration.
2. Inspect the thrust button for excessive wear or dis-
coloration.
3. Inspect the bearings for discoloration, roughness, or
excessive wear.
Installing/Shimming
NOTE: Ring gear clearance must be adjusted prior
to selecting shim for the thrust button.
1. Install the thrust button with shim into the gear case
cover and tighten securely (left-hand threads).
GC057A
2. Place the ring gear with selected shim into the cover
and measure the ring gear to thrust button clearance
with a thickness gauge. Clearance should be 0.020-
0.040 in.
GC058A
3. If clearance is as specified, remove the ring gear and
thrust button; then place a drop of red Loctite #271
on the threads and tighten to 8 ft-lb (left-hand
threads).
4. If clearance is not as specified, repeat steps 1 and 2
using thicker shim (clearance too great) or thinner
shim (clearance too small) until correct specification
is reached.
REAR DRIVE INPUT SHAFT/HOUSING
Removing/Disassembling
1. Remove the cap screws securing the rear drive input
shaft/housing to the rear gear case; then remove the
input housing assembly. Account for a gasket and
dowel pin.
AT THIS POINT
For servicing the input shaft, pinion gear, needle bear-
ing, ring gear, and axle seals, see Front Differential in
this section.
Summary of Contents for HDX 500 2017
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