Meritor RS 120, Maintenance Manual

Page: 21 / 65

Section 4
Prepare Parts for Assembly
Repair or
General:
Replace Parts -
bending or straightening.
! WARNING:
Repair of axle housings by bending or
straightening will cause poor or
unsafe operation of the axle and
early failure.
Replace worn or damaged parts of an
axle assembly. The following are some
examples to check for, repair or replace.
1. Replace any fastener if corners of the
head are worn.
2. Replace washers if damaged.
3. Replace gaskets, oil seals or grease
seals at the time of axle or carrier
repair.
4. Clean parts and apply new silicone
gasket material where required
when axle or carrier is assembled.
5. Remove nicks, mars and burrs from
parts having machined or ground
surfaces. Use a fine file. India stone,
emery cloth or crocus cloth-for this
purpose.
6. Clean and repair threads of fasteners
and holes. Use a die or tap of the
correct size or a fine file for this
purpose.
Repair Axle By Welding
1. Meritor Automotive, Inc. will permit
repairing drive axle assemblies by
welding ONLY in the following areas:
A. Cover welds.
B. Snorkel welds.
C. Housing seam welds between the
suspension attaching brackets.
! CAUTION:
Welding can be used when the crack
or damaged area is within the old
weld material. Replace the axle
housing. If the crack extends into the
metal next to the old weld. A housing
that has damage in the seam or cover
weld because of overload conditions
can be repaired. A repaired housing
must be used in correct applications.
! CAUTION:
Threads must be without damage and
clean so that accurate adjustments
and correct torque values can be
applied to fasteners and parts.
7. Tighten all fasteners to the correct
torque values. See the chart on page
85 for torque values of fasteners.
8. DO NOT repair rear axle housings by
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