TRW Steering Gears
NOTICE
Apply grease to the sector shaft with a hand-type
grease gun only. Use of a high-pressure power
grease gun will supply grease too quickly and
could affect the high pressure seal, contaminating
the hydraulic fluid.
Using a hand-type grease gun, apply NLGI Grade 2
or 3 multipurpose chassis grease until it starts to
come out past the sector shaft seal. See
Fig. 4.
46–05 Drag Link Lubrication
1. Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires.
2. Using a clean rag, wipe all dirt from both drag
link grease fittings. See
Fig. 5.
3. Using a pressure gun and NLGI Grade 2 (8%
12-hydroxy lithium stearate grease) or NLGI
Grade 1 (6% 12-hydroxy lithium stearate grease)
chassis grease, apply clean grease at the grease
fittings until old grease is forced out of the
socket.
46–06 Rack and Pinion
Steering Gear Inspection
WARNING
All steering system components are critical for
safe operation of the vehicle. Failure to maintain
the steering system as specified may result in
loss of steering control, which could lead to per-
sonal injury and property damage.
Inspect the rack and pinion steering system as de-
scribed below, and repair or replace any components
that are worn or damaged.
Figure 6 shows the com-
ponents of the rack and pinion steering system.
1. Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires.
2. Check the steering I-shaft U-joints for evidence
of looseness or binding. If any is found, replace
the I-shaft.
3. Check the steering I-shaft slip joint for evidence
of lateral movement, looseness, or binding. If any
is found, replace the I-shaft.
4. Jack up one axle end at a time, and move the
tire in and out by hand to check the tie rod ends
for free play. No free play is allowed. If the outer
tie rod ends are damaged or worn, replace them.
See Group 46 of the Century Class Trucks
Workshop Manual for replacement instructions.
5. Check the steering gear mounting bolts for secu-
rity.
6. Check that the outer tie rod castle nuts are tight,
and the cotter pins are properly installed.
f46107110/07/2016
1
1. Sector Shaft Grease Fitting
Fig. 4, TRW Steering Gear Lubrication
f46107210/07/2016
2
1
1. Grease Fitting at Pitman Arm
2. Grease Fitting at Axle Steering Arm
Fig. 5, Drag Link
Steering46
Century Class Trucks Maintenance Manual, January 201646/4
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