If your axle is equipped with the Posi-Lube feature, the bearings can be periodically lubricated without removing the hubs from the axle. This feature consists of axle spindles that have been specially drilled and fitted with a grease zerk in their ends. When grease is pumped into the zerk, it is channeled to the inner bearing and then flows back to the outer bearing and eventually back out the grease cap hole.

The procedure is as follows:

1. Remove the rubber plug from the end of the dust cap
2. Place a standard grease gun onto the grease zerk located in the end of the spindle. Make sure the grease gun nozzle is fully engaged on the fitting.
3. Pump grease into the zerk. The old, displaced grease will begin to flow back out the cap around the grease gun nozzle.
4. When the new clean grease is observed, remove the grease gun, wipe off any excess, and replace the rubber plug in the cap.

NOTE: THE POSI-LUBE FEATURE IS DESIGNED TO ALLOW IMMERSION. AXLES NOT EQUIPPED WITH POSI-LUBE ARE NOT DESIGNED FOR IMMERSION AND BEARING SHOULD BE REPACKED AFTER EACH IMMERSION.

If your axles are equipped with oil lubricated hubs, then your lubrication procedure is to periodically fill the hub with a high quality hypoid gear oil to the level indicated on the clear plastic oil cap. The oil can be filled from either the oil fill hose in the hub or through the rubber plug hole in the cap itself.

SEAL INSPECTION AND REPLACEMENT

Whenever the hub is removed, inspect the seal to assure that it is not nicked or torn and is still capable of properly sealing the bearing cavity. If there is any question of condition, replace the seal.

HUB REMOVAL

Whenever the hub equipment on your axle must be removed for inspection or maintenance, follow this procedure:

1. Elevate and support the trailer unit per manufacturer's instructions.
2. Remove the wheel.
3. Remove grease cap by carefully prying progressively around the flange of the cap. If the hub is on an oil lube type then the cap can be removed by unscrewing it counter-clockwise while holding the hub stationary.
4. Remove cotter pin from the spindle nut if equipped with cotter pin. If equipped with tang washer then bend the tang out of spindle nut.
5. Unscrew spindle nut (counter-clockwise) and remove the spindle washer.
6. Remove the hub from the spindle, careful not to allow the outer bearing cone to fall out. Inner bearing cone will be retained by the seal.