Check End Play - Meritor PreSet Maintenance Manual

Inspect for Leaks
1. Wear safe eye protection.
2. Park the vehicle on a level surface. Block the wheels to prevent
the vehicle from moving. Set the parking brake.
3. Remove the semi-fluid grease hubcap. There is no sight
window.
4. Inspect the outer bearing to verify that sufficient original
equipment manufacturer grease is present and that there is no
sign of contamination.
If additional grease is required: Add grease through the
fill hole (on trailer hubs only) or in the barrel of the hub, until
it flows from the outboard bearing. Do not mix grease types.
Use the same grease specification installed by the original
equipment manufacturer (OEM).
Grease Contamination
Visually inspect the grease for discoloration. Under normal
conditions the grease may darken slightly. A white or milky
appearance indicates water contamination. If the inspection
indicates contamination, service the hub.

Check End Play

In addition to the inspection, check end play whenever the brakes or
tires are serviced.
1. Wear safe eye protection.
2. Park the vehicle on a level surface. Block the wheels to prevent
the vehicle from moving.
3. Raise the axle until the tires are off the floor.
4. Place safety stands under the trailer frame or under each axle
spring seat. Figure 2.1.
Figure 2.1
Figure 2.1
5.
Figure 2.2
Figure 2.2
6.
Figure 2.3
Figure 2.3
7.
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Follow the wheel manufacturer's instructions to remove the tire
and wheel assembly. Figure 2.2.
Remove the hubcap. Attach the magnetic base of a dial
indicator to the spindle. Touch the dial indicator stem to the
hubcap mounting surface. Figure 2.3.
Grasp two wheel studs across from each other and pull and
push the hub.
Meritor Maintenance Manual MM-0637 (Revised 07-12)
2 Maintenance
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