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removed from a vehicle should first be cleaned with a

petroleum distillate solvent. The solvent itself must be

clean and filtered. Steam or water should never be used.

They will rust bearings in a very short time.

After a bearing has been cleaned with solvent, it should

be dried using a compressed air gun and blowing air

through the bearing from one end of the roller to the oth-

er. When air is used to dry a bearing, make sure there is

no water in the air line and do not spin the bearing at any

time with compressed air.

To ensure against unnecessary wear, all parts and as-

semblies coming in contact with, or operating together

with, the bearing should be thoroughly cleaned with sol-

vent, dipped in clean axle lubricant, and placed in pro-

tective oil paper. If oil paper is not available, use a clean,

dry shop towel.

PREPARING WHEEL SEALS AND BEARINGS

FOR INSTALLATION

Refer to

Fig. 1

, for a diagram of a properly installed

wheel seal and related components. The correct instal-

lation of oil seals ensures maximum sealing efficiency

and service life. There are four items which affect proper

installation and oil seal performance: first, the hub bore

and the spindle must be prepared to receive the seal;

second, the seal must be prepared for installation; third,

Wheel Seal and Bearing Removal, Installation & Maintenance

TMC RP 622 © 2003 – TMC/ATA – Reprinted with Permission