Meritor RS 120, Maintenance Manual

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Section 4
Prepare Parts for Assembly
!
WARNING:
Using wrong welding procedures or
welding at locations other than the
three areas permitted by Meritor will
make the heat-treated component
weak. A weak component will cause
poor or unsafe operation of the axle
and early failure. The following
procedure must be used.
damaged area to be repaired to
approximately 300° F (149° C).
G. Use a 70,000 psi tensile weld
material and the correct voltage and
amperage for the diameter weld rod
used. Examples of weld rod that can
be used are E-7018 and ER-70S-3.
! CAUTION:
Electrodes that are not stored in
correct sealed containers must be
heated at 7000 F (3710 C for one hour
before welding. Wet electrodes must
be dried at 1800 F (820 C) for one to
two hours and then heated at 70S0 F
(3710 C for one hour before welding.
2. Welding Procedure:
A. Drain the lubricant from the axle
assembly.
B. Remove the axle shafts and
differential carrier from the axle
housing.
! WARNING:
Be careful when using a cleaning
solvent.Followthesolvent
manufacturer's Instructions for safe
use to prevent Injury.
C. Clean the damaged area inside and
outside the housing. Cleaning
solvent can be used.
D. Grind the damaged weld to the base
metal.
E. Warm the complete axle housing to a
temperature of 700 F - 800 F (210 C -
270 C) or higher.
F. Before you start welding, heat the
H. Fill in the weld gap as follows:
! CAUTION:
Do not connect the ground cable to
any point on the axle assembly that
will put the bearings between the
ground cable and the weld area. If the
bearings are between the ground
cable and the weld, the bearings will
be damaged because of electric
arcing. A good location to connect the
ground cable is the spring mounting
pad on the housing.
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