Meritor RS-220, Maintenance Manual, Page: 52 / 53

Section 8
Adjustments and Preloads
48
Tooth Pattern Variations
Immediately check if the contact shows variation
with respect to the tooth pattern. If variation
should exist, alter the depth of the ring gear by
varying the backlash. Refer to
Table J .
Table J
Contact
Obtained
Meaning Correction
Toe
Contact This indicates
that the ring gear
is too close to
drive pinion,
causing the
contact to be too
close to the toe
of the tooth.
Figure 8.18 .
Retract the ring gear to
increase the backlash
(if necessary to the
maximum permitted) for
the contact area to move
towards the heel, drawing
closer in the manner
indicated in
Figure 8.14 .
Refer to Check Hypoid Gear
Set Backlash in this section.
Heel
Contact The ring gear is
too far away from
the drive pinion.
The resulting
contact is too
close to the heel.
Figure 8.19 .
Draw the ring gear closer,
decreasing the backlash (if
necessary to the maximum
permitted) to move the
contact area towards the
toe, drawing closer as
shown in
Figure 8.14 .
Figure 8.16
Figure 8.17
SHALLOW PATTERN
INCREASES THE DEPTH
DEEP CONTACT
DECREASES THE DEPTH
Figure 8.18
Figure 8.19
TOE CONTACT
HEEL CONTACT