rod ends are threaded in the cross tube past the
clamps and the slots at the cross tube ends.
9. Check the zerk fittings for damage. If a zerk
fitting is damaged, replace it.
Some tie rod ends have no zerk fittings because
they are not greaseable. Do not install a zerk
fitting on a nongreaseable tie rod end.
10. Check that the cotter pin is in place. If it is not,
tighten the tie rod end nut to one of the following
specs depending on the size of the stud.
• 7/8–14, 160 to 300 lbf·ft (217 to 406 N·m)
• 1–14, 250 to 450 lbf·ft (339 to 610 N·m)
• 1-1/8–12, 350 to 650 lbf·ft (475 to 881
N·m)
• 1-1/4–12, 500 to 675 lbf·ft (678 to 915
N·m)
11. Check the steering arm bolts for a minimum
torque of 300 lbf·ft (406 N·m). If the steering arm
bolt torque has fallen below this specification,
remove the bolt, clean all the threads, and apply
new Loctite® 680. Tighten the bolt 300 to 450
lbf·ft (406 to 610 N·m).
12. Remove the chocks from the tires.
33–05 Wheel End Inspection
and Maintenance, 6,000-
Pound and 8,000-Pound
Steer Axles with Oil-
Lubricated Hubs
Periodic inspection and maintenance of wheel ends
on 6,000-pound and 8,000-pound steer axles is
essential to sound wheel bearing performance.
Check for leaks at the oil seal and hub, and inspect
the lubricant per the maintenance intervals provided
in
Group 00 of this manual.
Oil Seal Leak Check
Check for evidence of oil leakage at the oil seal. If a
leak is found, replace the seal. See Group 33 of the
Business Class M2 Plus Workshop Manual for
instructions.
Hub Cap Leak Inspection
Check for evidence of oil leakage between the hub
cap, gasket and hub surface. If leakage is evident,
replace the gasket with a new one. See Section
33.01, Subject 100 of the Business Class M2 Plus
Workshop Manual for instructions.
Check for a missing hub cap fill plug or vent plug.
See
Fig. 9. Replace any missing parts. If a vent plug
is missing, the oil quality is compromised and must
be replaced. See Group 33 of the Business Class
M2 Plus Workshop Manual for instructions.
Lubricant Inspection
Rotate the hub so that the fill plug is down, and drain
a small sample of hub oil into a plastic container that
is free of debris, especially any metallic particles.
Then use a magnet to probe the sample. Note
whether there is substantial metallic debris present,
and compare the oil color to new approved oil.
Acceptable oil will have a color similar to new oil and
have no water or metal contaminants.
If the oil is not acceptable, inspect the bearings for
damage. Replace the bearings as needed, and install
the hub per Group 33 of the Business Class M2
Plus Workshop Manual.
f330247a
A
1
2
01/05/2009
A. Hub Cavity Full
1. Vent Plug
2. Magnetic Drain/Fill Plug
Fig. 9, Stemco Hub Cap
Front Axle 33
Business Class M2 Plus Maintenance Manual, 02/10/2023 33/5
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