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NOTE: Welch plug is convex
toward the king pin
Figure 7.3
5.
Using an appropriate tool (see note below), deform (flatten)
the welch plug to seal the housing. Ensure the welch plug
is convex (bowed) toward the king pin. Figure 7.4 and
Figure 7.5.
NOTE: The welch plug needs to be installed by a tool
approximately 90% its diameter. If an appropriate tool is
not available, one can be made by cutting off the rounded
end of an old king pin and attaching it to a handle or drift.
Figure 7.6.
UPPER WELCH
PLUG INSTALLATION
Figure 7.4
(16579)
Printed in USA
7
Assembly and Installation – MX-120 and MX-120-HR Series
LOWER
WELCH
PLUG
4018587a
4018588a
Copyright Meritor, Inc., 2023
LOWER WELCH
PLUG INSTALLATION
Figure 7.5
WELCH PLUG DRIVER
Figure 7.6
6.
Drive the new bushings into the socket bores so that the
bushings are level with the outside of the socket. Use
the correct size sleeve or driver. Refer to Special Tools on
page 81 for tool specifications.
7.
Pack the bushings with grease before assembly.
Install the Axle Shaft and Assemble the
Steering Knuckle
NOTE: If the axle shaft was removed without removing the steering
knuckle, refer to Install the Axle Shaft Through the Steering Knuckle
in this section.
1.
Inspect the housing seal to verify it is correctly installed.
2.
Install the axle shaft double-cardan joint assembly into the
housing. Carefully align the inner shaft splines with the
splines of the differential side gear. Figure 7.7.
4018666a
HANDLE
CUT OFF
OLD KING
PIN
WELD
4018889a
MM-0170 / Revised 03-23
Page 37
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