TM 5-3805-260-24
DIFFERENTIAL AND CARRIER ASSEMBLY (LOCK TYPE)
28. For Models 613BSNS and 613BSS, to make
an adjustment of the differential bearing
preload and gear clearance (backlash)
between the bevel gear and pinion use the
following procedure:
a) Tighten the adjustment nuts until there
is a small amount of preload on the bear-
ings.
b) Install tool group (C) on the bevel gear as
shown to check the gear clearance (back-
lash) at four locations around the bevel
gear 900 apart. Use the lowest indication
on tool group (C) as the correct gear
clearance (backlash) value. The correct
gear clearance (backlash) is .012 + .005
or - .004 in. (0.30 + 0.12 or - 0.10 mm).
c) If the gear clearance (backlash) is too
much, loosen the upper adjustment nut
and tighten the lower adjustmnent nut the
same amount to change to gear clearance
(backlash). If the gear clearance (back-
lash) is not enough, loosen the lower
adjustment nut and tighten the upper
adjustment nut the same amount to
change the gear clearance (backlash).
d) Tighten the upper adjustment nut until a
torque of 30 to 50 lb. in. (3.4 to 5.7
Nm) is needed to turn the pinion shaft.
e) Check the gear clearance (backlash)
again as the Steps b and c.
28A. For Models 613BSNS1 and 613BSSI to
make an adjustment of the differential
bearing preload and gear clearance (back-
lash) between the bevel gear and pinion use
the following procedure:
a) Turn carrier assembly until the pinion
housing is down.
b) Tighten one of the bolts (47) on each
bearing cap (46) and (48) to a torque of
70 Nm (50 lb. ft.). Tighten the other
bolt on each bearing cap to a torque of
5 Nm (4 lb. ft.).
c) Use tool (D), and tighten both bearing
adjuster nuts (49) and (50) evenly until
there is a small amount of backlash and
zero preload on the differential bear-
ings.
d) Turn the carrier assembly until the
pinion housing is in the horizontal
position.
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