Caterpillar — Bearing Inspection
Maintenance · Generator Bearings
From a Caterpillar owner's manual covering: 7C-1000, 9Y-1300, 9Y-1400, SR4. Check it applies to your exact model before use.
Applies to: Caterpillar SR4
Before you start
- Bearings being removed for failure analysis should not be cut off with a torch.
- DO NOT MIX GREASES
Procedure
- Remove bearing bracket; inspect the bracket bore and bearing outer race and rolling elements.
- Inspect the bearing bracket bore for out of roundness, excessive wear, and a bracket step less than 0.0762 mm (.003 in).
- Spherical Roller Bearing should be cleaned and re-packed with 108-8611 Grease; pack the bearing and cavity to one-third to one-half of cavity volume.
- All ball bearings should be cleaned and the bracket cavity re-packed with 2S-3230 Grease to one-third to one-half of the cavity volume.
- Make sure the grease supply tube to the bearing is filled with grease.
- Remove the bracket drain plug and operate generator for one hour to force excess grease out of the cavity.
- Stop the engine, install the bracket drain plug and wipe off excess grease.
- For future greasing intervals follow the recommendation on the lubrication plate or the Maintenance Schedule; repeat Step 5 each time the bearings are greased.
Specs & values
- Bracket step less than 0.0762 mm (.003 in)
- Approximately 3 - 4 oz. in the bearing and 4 - 5 oz. in the cavity
Source: Caterpillar owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.