TM 10-3930-641-34-2
DIFFERENTIAL AND BEVEL GEAR ADJUSTMENT (CONT)
(Sheet 6 of 7)
LOCATION/ITEM
ACTION
REMARKS
11.
Tooth contact
a. After the backlash and preload adjustments
have been made, the tooth contact be-
tween pinion (6) and ring gear (7) must be
checked, as follows:
(1) Put a small amount of Prussian blue,
red lead, or paint on the teeth of
ring gear (7).
(2) Turn pinion (6) in both directions.
(3) The correct area of tooth contact
starts near the inside end of the teeth
of ring gear (7) and goes a maximum
of 50 percent down the length of the
teeth. See Illustration A for the cor-
rect area of tooth contact.
b. If the area of tooth contact looks like
Illustration B, use the procedure that fol-
lows:
(1) Add some of shims (9).
(2) Do Step 6 thru 10 again.
(3) Do Step 11 again to check the area
of tooth contact.
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