33–05 Oil-Filled Hubs Oil Level
Checking
WARNING
Be careful not to overfill the hubs. Overfilling may
cause oil to be forced out of the hubs and to con-
taminate the brake linings and other brake compo-
nents. This could result in loss of vehicle control
and lead to personal injury and property damage.
1.
With the vehicle on a level surface, rotate the
front wheels and allow the oil in the hubs to
settle.
2.
Chock the tires.
IMPORTANT: The oil level should be at, or no
more than 1/4 inch (6 mm) above, the level indi-
cators on the hub caps.
3.
If necessary, remove the filler caps (in the ends
of the hub caps) and add enough oil (80/90 hy-
poid gear oil) to bring the oil to the proper level.
4.
Rotate the wheels, allow the oil to settle, and
check the levels again.
5.
Install the filler caps securely.
6.
Remove the chocks from the tires.
33–06 Oil-Filled Hubs Oil
Changing
WARNING
Be careful not to overfill the hubs. Overfilling may
cause oil to be forced out of the hubs and to con-
taminate the brake linings and other brake compo-
nents. This could result in loss of vehicle control
and lead to personal injury and property damage.
1.
With the vehicle on a level surface, rotate the
front wheels so that the front hub drain plugs are
positioned downward.
2.
Chock the tires.
3.
Place suitable containers under the hubs, re-
move the filler caps (in the ends of the hub caps)
and the drain plugs, and allow the hubs to drain
completely.
07/18/96
f330131
1
2
NOTE: If the reading is more than 0.060 inch (1.52 mm)
when moving the tie-rod end and cross tube assembly
up and down, replace the tie-rod end.
1.
Tie-Rod End
2.
Dial Indicator with "Contour-Type" Base
Fig. 3, Measuring Tie-Rod End Looseness
f320033a
1
OK
OK
10/13/2005
IMPORTANT: The tie-rod end threads must be visible
throughout the entire length of the split.
NOTE: Pinch bolt not shown to provide clarity.
1.
Cross-Tube Split
Fig. 4, Tie-Rod End Adjustment
Front Axle
33
School Bus Chassis Maintenance Manual, July 2003
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