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5. Orient the seal properly. Many oil bath seals will be marked AIR SIDE on
the side of the seal to facing out of the hub after installation.
6. Install new seal into place using a seal driver or seal installation tool
of proper size. It is important that any seal installation tool contact the
outer ring of the seal casing. If no seal driver is available, use a clean
block of wood. It is critical that the seal be driven in evenly and straight.
NEVER hammer directly on the seal.
7. The seals will be pressed ush to the back surface of the hub in the
600-8,000 lbs. capacity product line. It is NEVER necessary to bottom
out the seal for proper installation. Driving the seal in too deep may
damage the seal and may come in contact with the inner bearing
preventing it from rotating freely.
8. Proper installation will maintain the seal atness in the hub within .010".
A seal that is cocked too much inside the hub will be more likely to leak.
Bearing Adjustment and Hub Replacement
If the hub has been removed or bearing adjustment is required, the following
adjustment procedure must be followed.
For standard grease or oil axles using cotter pin:
1. After placing the hub, bearings, washers, and spindle nut back on the
axle spindle in reverse order as detailed in the previous section on hub
removal, rotate the hub assembly slowly while tightening the spindle nut
to approximately 50 Ft. Lbs. (12" wrench or pliers with full hand force.)
2. Then loosen the spindle nut to remove the torque. Do not rotate the hub.
3. Finger tighten the spindle nut until just snug.
4. Back the spindle nut out slightly until the rst castellation lines up with
the cotter key hole and insert the cotter pin.
5. Bend over the cotter pin legs to secure the nut.
6. Nut should be free to move with only restraint being the cotter pin.
Hubs/Drums/Bearings
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