KIC Catalog

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.

Install the flanged drive axle shaft with a new axle flange

gasket. Torque flange nuts to axle manufacturer’s speci-

fication. Clean-up any over spills that would give the ap-

pearance of a leaking system.

Oil is supplied directly to the wheel ends at assembly

and through the axle tube during operation. To achieve

final fill level, each end of the drive axle must be raised

a minimum of eight inches for one minute to move the

lubricant into the opposite wheel end. Recheck the main

sump for the proper oil level and top off the lubricant

level, if required. The oil fill level is always to the bottom

of the fill plug or hole in the axle reservoir.

! CAUTION

:Do not pack the drive axle wheel bear-

ings with grease when the wheel ends will be lubricated

with oil from the axle differential. (See RP 622 and RP

618.)

NOTE:

Always check the axle breather to be sure it is

operating properly and completely free of dirt and de-

bris.

MAINTENANCE AND INSPECTION

REQUIREMENTS

The following inspection criteria are intended for units

whose vocation is strictly on-highway use only. The in-

spection criteria are not intended for unitized or pre-set

wheel ends, refer to systems manufacturer for inspec-

tion and service recommendations.

These recommendations depend on the proper as-

sembly of the system, including the proper lubricant fill

level.

A. OIL LUBRICATED WHEEL ENDS

INSPECTION CRITERIA

Level 1—Simple Inspection (Pre-Trip/In-Service)

Walk around vehicle and check wheel-ends for obvious

signs of lubricant leakage, such as hubcap gasket and

wheel seal areas, oil soaked brake linings. Check for

broken or missing components. Any seepage is reason

for further inspection and appropriate action.

Take appropriate action if leaks or oil soaked brake

linings are noted.

NOTE FOR DRIVERS:

After making an en route stop,

walk around the unit and feel the hubs. If there is any

significant differences in temperatures or excessive

temperature, contact your maintenance department.

When feeling hubs for temperature, seasonal influences

should be taken into consideration.

If wheel-ends are equipped with a sight glass on the hub-

caps, check to ensure the oil is at the proper fill level.

NOTE:

Oil residue may be present at the vent area. This

is an indicator that the system is venting properly. This

should not be construed as system leakage.

Level 2—100,000 miles or Annual Inspection:

For non-driven axles check lubricant level and condition.

If lubricant is contaminated replace old lubricant with the

same type lubricant. If lubricant condition is good and

level is low, fill to the proper level. Check for any signs of

leakage at the seal or hubcap gasket areas. Check for

oil soaked brake linings.

For driven axles, check for any signs of leakage at the

seal or axle flange gasket areas. Also check for leaks at

hub fill hole if so equipped. Check for oil soaked brake

linings.

Take appropriate action if leaks or oil soaked brake

linings are noted.

B. GREASE LUBRICATED WHEEL ENDS

INSPECTION CRITERIA

Level 1—Simple Inspection (Pre-Trip/In-Service)

Walk around vehicle and check wheel-ends for obvious

signs of lubricant leakage, such as hubcap gasket and

wheel seal areas, grease soaked brake linings. Check

for broken or missing components. Any seepage is rea-

son for further inspection and appropriate action.

NOTE FOR DRIVERS:

After making an en route stop,

walk around the unit and feel the hubs. If there is any

significant differences in temperatures or excessive

temperature contact the maintenance department.

When feeling hubs for temperature, seasonal influences

should be taken into consideration.

Level 2—Detailed External Inspection

(Conducted at PM or at least annually)

Check wheel-ends for obvious signs of lubricant leak-

age, such as hubcap gasket and wheel seal areas,

grease soaked brake linings. Any seepage is reason for

further inspection and appropriate action. Raise the ve-

hicle and check for smooth rolling of wheels. Check for

signs of excessive end play in the wheel-end. This does

not include removal of the hub cap.

NOTE:

Leaking grease may not spread over the hub

and brake components as with hubs filled with oil. When

Recommendations for Wheel End Lubrication