Lubrication the U-Joint

rv mm 20.00.000
  1. Wipe all old grease and dirt from each U-joint grease fitting.
  2. Use a hand-type grease gun, or a high-pressure gun with a low-pressure adaptor, to lubricate the U-joints. See Fig..

    1. U-Joint Grease Fitting

    2. Slip-Joint Grease Fitting

    Fig. 1, Slip-Joint and U-Joint Lubricating

    3. Note: If a low-pressure adaptor is not used with the high-pressure gun, the U-joints may not receive enough lubricant.

  3. Using lithium 12-hydroxy stearate grease (NLGI grade 2, with EP additives and meeting ASTM D4950 LB specifications), lubricate until new grease can be seen at both U-joint seals.

    4. Notice: Fresh lubricant must be seen escaping from both of the bearing cup seals of each U-joint. If not, the U-joint may fail prematurely.

  4. If the bearing will not take grease, replace the U-joint assembly.
  5. Check the old grease. If it appears rusty, gritty, or burned, replace the U-joint assembly.
  6. Wipe any excess grease from the seals and grease fittings.
Note:
Parent topic: Lubrication of the Mechanical Fan Drive Gearbox
Document Number: 0000120276
Manual Publication Date: 2024-05-23
Topic Publication Date: 2024-11-13