freightliner MC - Oil-Filled Hubs Oil Level Checking

necessary. If the end play exceeds the
limit, service the hub. See the Recre-
ational Vehicle Workshop Manual and
manufacturer literature for procedures.
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 (80W–90
hypoid 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 plugs (in the ends of the hub
caps) and the drain plugs, and allow the hubs to
drain completely. See
Fig. 11.
06/20/2011 f330270
1
2
1. Hub Cap Mounting Flange
2. Dial Indicator (with magnetic base)
Fig. 9, Dial Indicator Setup
06/21/2011 f330271
A
A
A. Pull and push the hub while oscillating it.
Fig. 10, Measuring End Play
Front Axle33
Recreational Vehicle Chassis Maintenance Manual, June 201533/6