Western Star 47X 2020, Maintenance Manual

Page: 81 / 166

33–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
When working on the vehicle, shut down the en-
gine, set the parking brake, and chock the tires.
Before working under the vehicle, always place
jack stands under the frame rails to ensure the
vehicle cannot drop. Failure to follow these steps
could result in serious personal injury or death.
33–01 Knuckle Pin Lubrication
NOTICE
Use regulated pressure when lubricating the
knuckle assemblies, otherwise damage could re-
sult to the knuckle caps.
Detroit
™
Axles
1. Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires. When lubricating upper and lower knuckle
assemblies, do not raise the front axle.
2. Wipe the fittings clean.
3. Apply multipurpose chassis grease, NLGI Grade
1 (6% 12-hydroxy lithium stearate grease) or
NLGI Grade 2 (8% 12-hydroxy lithium stearate
grease), until new grease is seen at the junctions
of the axle beam and knuckles. For locations of
grease fittings, see
Fig. 1 ; for grease exit points,
see Fig. 2 .
Meritor Axles
When lubricating knuckle pin bushings, do not raise
the front axle. Wipe the lube fittings clean, and apply
multipurpose chassis grease, NLGI Grade 1 (6% 12-
hydroxy lithium stearate grease) or NLGI Grade 2
(8% 12-hydroxy lithium stearate grease) until new
grease is seen at the bushing grease seal opposite
the fittings. The grease seal will accept grease pres-
sure without damage, and is designed to have
grease pumped out through it during lubrication.
Even if grease leaks out around the top, or bottom-
plate gasket, continue pumping until new grease is
seen at the bushing seal opposite the grease fitting.
See
Fig. 2 .
33–02 Tie Rod Inspection
Inspect the tie-rod ends as follows:
1. Shake the cross-tube. A loose fit, or movement
between the tapered shaft of the ball and the
cross-tube socket members indicates that the
tie-rod end assembly must be replaced.
2. The threaded portion of the tie-rod end assembly
must be inserted all the way into the cross-tube
split for adequate clamping. See
Fig. 3 . Replace
the components if this cannot be done. For in-
structions, refer to
Group 33 of the Western Star
47X and 49X Workshop Manual .
06/07/2012 f330272
A
B
1
1
A Upper View, LH Side B Lower View, LH Side
1. Grease Fitting
Fig. 1, Grease Fittings, Detroit Axles
Front Axle
33
47X and 49X Maintenance Manual, August 2020
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