TM 5-3810-306-34
e While reading dial indicator, rotate
NOTE
differential and bevel gear a small amount
in both directions, against teeth of drive
In
the
following
procedures,
pinion.
If backlash reading is within
movement of the contact pattern in
specification, continue by checking tooth
the length of the tooth is indicated as,
contact patterns. If backlash reading is
toward the "heel" or "toe" of the
not within specifications, adjust backlash
bevel gear (12).
as needed by following steps f and g.
NOTE
NOTE
Always check tooth contact patterns
Backlash is increased by moving the
on the drive side of the gear teeth.
bevel gear away from the drive
pinion. Backlash is decreased by
a Adjust backlash of a new gear set to either
moving the bevel gear toward the
0.012 in. (.30 mm) or 0.015 in. (.38 mm).
pinion.
Adjust backlash of old gear set to setting
that was measured before carrier was
f Loosen one bearing retaining ring (1) one
disassembled.
notch then tighten opposite ring same
amount.
b Apply
a
marking
compound
to
approximately 12 gear teeth of the bevel
NOTE
gear (12). Rotate bevel gear so that 12
gear teeth are next to drive pinion.
When you adjust backlash, move the
bevel gear ONLY. DO NOT move the
c Rotate bevel gear (12) forward and
drive pinion.
backward so that 12 gear teeth go past
drive pinion six times to get contact
g Repeat steps b thru f until backlash is
patterns. Repeat if needed to get a more
within specifications.
clear pattern.
1 . CHECK TOOTH CONTACT PATTER NS.
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