Lippert Components Trailer Axle (8-12K) - Manual (Page 8)

Rev: 04.18.2014
Page 8
Trailer Axle 8-12K Owners Manual FULL
Seal Inspection and Replacement
Always check the seal to make sure that it is not damaged, nicked, cracked or torn and is in good working
order. If there is any question of condition, replace the seal.
Procedure to replace seal:
1. Pull seal from the hub with a seal puller. Never push the seal out with the bearing. The bearing may get
damaged.
2. Apply a PERMATEX sealant to the outside of the new seal.
NOTE: Do not use PERMATEX on rubber encased seals.
3. Tap the new seal into place using a clean, hardwood block (Fig. 3).
NOTE: When installing a new oil seal, be sure side marked “AIR SIDE” is away from bearing cone.
Fig. 3 Fig. 4
Bearing Adjustment/Hub Replacement
To adjust bearings or replace removed hub, follow procedures below:
1. Place hub, bearing, washers and castle nut back on axle spindle in the reverse order from which they
were removed. Castle nut should be torqued to 50 ft.-lb. Hub will rotate during this process.
2. Loosen castle nut to back off the torque.
3. Tighten castle nut finger tight until snug.
4. Insert cotter pin. If cotter pin does not line up with hole, back castle nut up slightly until pin can be
inserted (Fig. 4).
5. Bend cotter pin over to lock nut in place. Nut should be free to move with only the cotter pin keeping
it in place.
6. Tighten screw in cap to 25 ft-lbs.