2-S37
ZD321, ZD326, ZD331, WSM
TRANSAXLE
[2] TRANSMISSION CASE
Checking Bearing
1. Hold the inner race, and push and pull the outer race in all
directions to check for wear and roughness.
2. Apply transmission fluid to the bearing, and hold the inner race.
Then, turn the outer race to check rotation.
3. If there is any defect, replace it.
W1039304
Backlash and Tooth Contact between 16T or 18T Bevel Gear
and 19T Bevel Gear
1. Measure the backlash between the 16T or 18T bevel gear (1) and
19T bevel gear (1).
2. When the backlash is too large, decrease the number of shims in
the side of the spiral bevel gear, and insert the removed shims in
the opposite side. When the backlash is too small, decrease the
number of shims in the side of the differential case, and insert the
removed shims in the opposite side.
3. Adjust the backlash properly by repeating the above procedure.
4. Apply red lead lightly over several teeth at three positions equally
spaced on the hypoid ring gear.
5. Turn the 16T or 18T bevel gear by input shaft while pressing a
wooden piece against the periphery of the bevel gear.
6. Check the tooth contact, if not proper, adjust according to the
following instruction.
W1039404
Backlash between 19T
bevel gear and 16T or
18T bevel gear
Factory spec.
0.25 to 0.30 mm
0.0099 to 0.011 in.
Tooth contact Factory spec.
More than 25 % read lead
contact area on the gear
tooth surface
The position of tooth
contact point
Factory spec.
The center of tooth
contact at 3/10 of the
entire width from the small
end
(1) 16T Bevel Gear (ZD321, ZD326)
18T Bevel Gear (ZD331)
(2) 19T Bevel Gear
(3) Joint Shaft
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