Specifications

Assembly and Installation
58 MAINTENANCE MANUAL
After checking the tooth contact patterns, the
backlashcanbeadjustedwithinthespecica-
tion limits, if needed. To change the location of
the pattern, use the following procedures.
1. Attach a dial indicator onto the differential
mountingange.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 dif-
ferential case and ring gear a small amount in
both directions against the drive pinion teeth.
• Ifthebacklashreadingiswithinthespecica-
tion, check the tooth contact patterns.
• Ifthebacklashreadingisnotwithinthespeci-
cation,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.
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 back-
lashiswithinspecication.Recordthesetting
forusewhenyouadjustthepinionbearingpre-
load.
Gear Set Tooth Contact Patterns,
Backlash
Meritor’s differential can have a conventional
or a generoid hypoid gear set. The tooth con-
tact patterns for each type of gear set are dif-
ferent. 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.
Figure 5.43
Figure 5.44
Figure 5.46
MEASURE OUTER DIAM-
ETER FOR APPROXIMATE
PITCH DIAMETER
TIGHTEN ADJUSTING
RING THIS SIDE
INCREASE BACKLASH
DECREASE BACKLASH
LOOSEN ADJUSTING
RING THIS SIDE
TIGHTEN ADJUSTING
RING THIS SIDE
LOOSEN ADJUSTING
RING THIS SIDE
Figure 5.45