The procedure covers the removal, replacement of yoke bearings and seals and assembly.

Skill Level

Estimated to to complete: 1 Hour

1. Remove and label air all air lines.
2. Remove water union or new style water union bracket.
3. Remove large nut from bottom of both air cylinders with a 1-1/16″ wrench. (You might have to hold the cylinder from turning with vise grips at the bottom of cylinder. Be careful not to adjust vise grips too tight causing damage to cylinder!).
4. Next loosen the jam nut at the rod end of the cylinder at the rod end of the cylinder and then unscrew the rod from the spindle body.
5. Top seal can be removed by tapping on one side with a screw driver and then carefully prying out and then discard it.
6. Place a 3/4″ wrench on the tool adapter plate, located on the spindle head between a mounting screw and the center tool stud for leverage when removing the top yoke bearing nut and then discard the nut.
7. Usually the yoke assembly can be removed by pulling back with several forceful jerks. If not, place an undersized bolt in the spindle shaft hole and use a gear puller to remove.
8. When assembly is removed, place on the table and tap out the bottom seal the same way the top one was removed and discard the seal.
9. Tap out the bearings from the housing gently with a punch while working around the whole bearing. Be careful not to damage the walls of the yoke body.
10. After the bearings are removed inspect the the spring clip and spacer between the bearings for damage. If they are OK they can be re-used. If not then replace with new ones provided in the kit.
11. Re-assembly is done in revers order. Be very careful when tapping in new bearings and seals. The seals only need to be mounted flush with the housing body.