MAINTENANCE MANUAL - Meritor

Assembly and Installation
MEASURE OUTER DIAM-
ETER FOR APPROXIMATE
PITCH DIAMETER
Figure 5.43
After checking the tooth contact patterns, the
backlash can be adjusted within the specification
limits, if needed. To change the location of
the pattern, use the following procedures.
1. Attach a dial indicator onto the differential
mounting flange. Figure 5.44.
Figure 5.44
2.Adjust the dial indicator so that the plunger is
against the tooth surface.
3.Adjust the dial indicator to ZERO. Hold the drive
pinion in position.
4. After reading the dial indicator, rotate the differential
case and ring gear a small amount in
both directions against the drive pinion teeth.
• If the backlash reading is within the specification,
check the tooth contact patterns.
• If the backlash reading is not within the specification,
adjust the backlash as needed.
5.Loosen one bearing adjusting ring one notch.
Tighten the opposite ring by the same amount..
• To increase the backlash, move the ring gear
away from the drive pinion. Figure 5.45.
• To decrease the backlash, move the ring gear
toward the drive pinion. Figure 5.46.
INCREASE BACKLASH
DECREASE BACKLASH
TIGHTEN ADJUSTING
RING THIS SIDE
LOOSEN ADJUSTING
RING THIS SIDE
Figure 5.45
LOOSEN ADJUSTING
RING THIS SIDE
TIGHTEN ADJUSTING
RING THIS SIDE
Figure 5.46
NOTE:
When you adjust the backlash, only move
the ring gear. Do not move the drive pinion.
6. Repeat Step 2 through Step 5 until the backlash
is within specification. Record the setting
for use when you adjust the pinion bearing preload.
Gear Set Tooth Contact Patterns,
Backlash
Meritor’s differential can have a conventional
or a generoid hypoid gear set. The tooth contact
patterns for each type of gear set are different.
Check the part numbers to determine
what type of gear set is in the differential. See
the Figure 5.47 for the location of part numbers.
See the Section 4.
58 MAINTENANCE MANUAL