Case 580SR, Service Manual

Page: 462 / 1068

110 SECTION 25 - FRONT AXLES
Assemble the ring nuts (3) and (7) into the differen-
tial support.
Tighten both ring nuts (3) and (7) with special tool
380000406 , till the backlash is eliminated and the
differential bearings are slightly preloaded.
Check that the differential bearings are well settled;
if necessary, knock slightly with a soft hammer, in
order to properly set the bearings in position.
Position a magnetic-base dial gauge on the differen-
tial support, so that the feeler stylus touches the sur-
face of one tooth of the ring gear with a 90° angle.
Lock the pinion and move the crown gear alterna-
tively and note the pinion-ring gear backlash, meas-
ured with the comparator.
Repeat the operation on 2 or more points (teeth), ro-
tating the crown gear, so that to obtain an average
value.
Check if the measured backlash value is within the
requested range:
0.18÷0.25 mm
Carry out the adjustment by operating on the ring
nuts with the appropriate tool
380000406 .
Adjust the ring nuts (3) and (7), remembering that:
(A)- if the measured backlash is greater than the
given tolerance range, unscrew the adjuster
ring nut (3) and screw in the adjuster ring nut (7)
by the same measure.
(B)- if the measured backlash is less than the given
tolerance range, unscrew the adjuster ring nut
(7) and screw in the adjuster ring nut (3) by the
same measure.
F27429
3
7
F27293
F27430
F27295
A
B
A
B
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