TM 5-3810-306-34
g. Repeat step d and e.
Range of backlash setting - .010 to .020 in. (.25 to .51
mm). Backlash setting for new gear sets .005 - .015 in.
h. Turn each adjusting ring (1) one notch
(.13 - .38 mm).
from zero end play measured in step f to
preload differential bearings.
NOTE
14. CHECK BEVEL GEAR RUNOUT.
Measure the outer diameter of bevel
gear (12) for approximate pitch
a. Attach dial indicator to mounting flange of
diameter.
housing (31).
NOTE
b. Adjust indicator so that plunger or pointer
is against back surface bevel gear.
If the old bevel gear set is installed,
adjust the backlash to the setting that
c. Adjust dial indicator to zero (0).
was measured before the carrier was
disassembled.
d. Rotate differential and bevel gear while
reading dial indicator. Runout of bevel
NOTE
gear should not exceed 0.008 in. (0.20
mm).
If a new bevel gear set is installed,
adjust the backlash to the correct
e. If bevel gear runout exceeds 0.008 in.
specification for new gear sets.
(0.20 mm) remove differential and bevel
gear (12) and perform steps f thru h.
NOTE
f. Inspect all parts for wear. Replace parts
During the check of tooth contact
as required.
patterns, the backlash can be
adjusted within specification limits, if
g. Install differential and bevel gear (12) in
needed, to change the location of the
housing (31).
pattern.
h. Perform steps a thru d.
a. Attach a dial indicator on mounting flange
of housing (31).
15. ADJUST BEVEL GEAR BACKLASH.
b. Adjust dial indicator so that plunger or
Specifications:
pointer is against tooth surface of bevel
gear (12).
Bevel gears that have a pitch diameter of less than 17 in.
(431.8 mm).
c. Adjust dial of indicator to zero (0).
Range of backlash setting - .008 to 0.18 in. (.20 to .46
mm).
d. Hold pinion in position.
Backlash setting for new gears .012 in. (.30 mm).
Bevel gears that have a pitch diameter of 17 in.
(431.8 mm) or greater than 17 in.
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