E-41
35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
Differential
b. BACKLASH AND TOOTH CONTACT BETWEEN
RING GEAR AND SPLINE SHAFT.
1) Set the dial indicator between ring gear and Spline
Shaft. Move the ring gear by hand.
2) When backlash is more, decrease the number of
shims from the ring gear opposite side and insert
the removed shims in ring gear side. When the
backlash is too less decrease the number of shims
from the ring gear side and insert the removed
shims in the opposite side.
3) Adjust the backlash properly by repeating the
above procedure.
4) Apply red lead / blue light over several teeth at
three positions equally spaced on the ring gear.
5) Turn the ring gear, and spline shaft while pressing
a wooden piece against the periphery of the ring
gear.
6) Check the contact if not proper according to the
instructions below.
More than 35% red lead contact are on the gear tooth
surface.
The center of both contact a 1/3 of the entire width
from the small end.
Adjusting with thicker shims to move spline shaft
backward and place the RH shim to left to move ring
gear left ward.
Repeat above until proper tooth contact and backlash
are achieved.
Fig. A & B gives view of correct markings.
Fig. C & D gives view of setting too far in. This gives
incorrect tooth contact resulting noisy operation and
premature wear of gears.
Fig. E & F shows the markings of a pinion which has
been set too far out. This tends to cause premature
wear of the bevel gear.
If it is necessary to reset the pinion, the backlash will
need to be adjusted.
Fig. A Fig. B
Fig. C Fig. D
Fig. E Fig. F
Backlash between
Ring Gear and
Spline Shaft
Factory specifications
Allowable Limit
0.007 to
0.009 in
0.015 in
Checking Backlash
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