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Front Axle
If the hub rotates smoothly and without noise, go
to the next step.
18. Bend an opposing tab of the tabbed washer over
a flat of the outer locknut.
19. Install the wheel and tire assembly. Hand-tighten
the wheel nuts.
20. Raise the vehicle, remove the jackstands, then
lower the vehicle.
21. Tighten the wheel nuts 500 lbf·ft (678 N·m).
22. Install the hub cap.
If installing a metal hub cap, go to the next step.
If installing a plastic hub cap, do the following:
22.1
Apply a continuous 1/8-inch (3-mm) bead
of RTV silicone sealant to the outside first
thread of the hub cap. Apply the sealant
around the entire circumference.
IMPORTANT: Use only the following RTV
sealants on the hub cap:
• Meritor part number 2297-Z-7098
• Three Bond®
• Loctite® Ultra Grey Adhesive Sealant 18581
22.2
Install the hub cap by hand until it is
seated.
NOTE: Disregard the torque value em-
bossed on the hub cap.
22.3
Using a torque wrench, tighten the hub
cap 75 lbf·ft (102 N·m).
If you cannot tighten the hub cap to the
correct torque value, or if it makes a pop-
ping sound while being tightened, replace
it with a new one.
23. If installing a metal hub cap, do the following:
23.1
Using a wire brush, clean the unitized
wheel-end inner threads and the hub cap
external threads.
23.2
Apply Loctite 17430 gasket sealant to the
external hub cap threads.
23.3
Install the hub cap by hand until it is
seated.
23.4
Using a torque wrench, tighten the hub
cap 350 lbf·ft (475 N·m).
Columbia Maintenance Manual, July 2017
NOTE: If you cannot tighten the hub cap to
the correct torque value, or if it makes a
popping sound while being tightened, re-
place it with a new one.
24. Remove the chocks from the tires.
33–09 Kingpin Lubrication,
™
Detroit
1. Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires. When lubricating the kingpin, 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
see
Fig.
8.
33–10 Tie Rod Lubrication,
™
Detroit
For any Detroit axle that requires lubrication of the
tie-rod ends, wipe the grease fittings clean, then
pump multipurpose chassis grease, NLGI Grade 1
(6% 12-hydroxy lithium stearate grease) or NLGI
Grade 2 (8% 12-hydroxy lithium stearate grease),
into the tie-rod ends until all used grease is forced
out and fresh grease is seen at the ball stud neck.
See
Fig.
9.
33–11 Steer Axle Hub Cap Vent
Plug Inspection
General Information
As a function of their design, hubcap vent plugs will
on occasion exhibit signs of hub oil on their exterior
surface. Depending on environmental conditions
and/or age of the plug, the amount of oil present can
vary. This is a normal result of the venting process
due to pressure increase within the hub cavity. For
an example of normal vent plug appearance, see
Fig.
10.
33
Axles
Fig.
7; for grease exit points,
Axles
33/5
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