KIC Catalog

! CAUTION

:Overfilling or under filling a wheel hub

with lubricant may result in premature component

failure.

Hub Fill Procedures: Semi-fluid Grease

If tires are not mounted, install the hub on the spindle.

Take care to not damage the seal. Use lifting equipment

to align the hub assembly with the spindle taking care to

not damage the seal and spindle threads and push the

hub assembly into position. With the hub supported, be-

fore installing the outer bearing cone, begin filling from

the bottom of the hub cavity. Top-off by placing the pump

nozzle above the spindle, and continue pumping grease

into the hub cavity. (See

Figure 5

The grease fill amount should be to a 3 o’clock and 9

o’clock level. This represents 50 percent hub cavity fill.

(See

Figures 5A

and

NOTE: A template may be used to hold the lubricant in

place while filling the hub cavity. (See

Figures 5

and

! CAUTION

:Make sure that there are no air-pockets

trapped under the grease. If pumping equipment is used,

ensure the pump does not aerate the grease. Aeration of

the grease may result in underfilling.

Install the outer bearing, washers and adjusting nuts.

Adjust wheel bearings per TMC’s RP 618 or per OEM

Maintenance Manual. Verify end play (0.001” to 0.005”)

with a dial indicator. Before installing the hubcap, apply

a coating of grease around the wheel bearing adjust-

ment nut(s).

Hubcap Considerations: Semi-fluid Grease

Use an appropriate tamper-proof, vented hubcap. These

hubcaps prevent gear oils from being accidentally added

to grease-filled wheel ends.

NOTE:

Because of the hubcap’s special venting capa-

bility and the properties of the semi-fluid grease, do not

fill the hubcap with grease.

NOTE:

If a metal hub cap is used, it is necessary to coat

the interior surfaces with a film of grease. Use special

care not to cover the vent with grease.

Hub Fill Procedures: Hard Grease

Before installing the hub, pack grease into the hub cavity.

Fill the circumference of the hub cavity using the bearing

races as the proper level guide. (See

Figure 6

Use lifting equipment to align the hub assembly with the

spindle taking care to not damage the seal and spindle

threads. Push the hub assembly into position.

Install the outer bearing, washers and adjusting nuts.

Adjust wheel bearings per TMC’s RP 618 or OEM Main-

tenance Manual. Verify end play (0.001” to 0.005”) with

a dial indicator. Apply a coating of grease around the

adjusting nut(s).

Recommendations for Wheel End Lubrication