Caterpillar — Bearing (Ball) - Lubricating Process
Maintenance · Ball Bearing
From a Caterpillar owner's manual covering: 3306B, 3406, 3406E, 3412C, SR4B. Check it applies to your exact model before use.
Applies to: Caterpillar 3306B, Caterpillar 3406, Caterpillar 3406E, Caterpillar 3412C, Caterpillar SR4B
Procedure
- Remove either the louver assembly or the rear plate from the rear of the generator housing.
- Remove the top grease pipe plug and remove the lower grease pipe plug.
- Install a grease fitting in the grease pipe.
- Grease the shielded ball bearings with 2S-3230 Bearing Lubricant (53.28 mL (1.8 ounces) to 59.20 mL (2.0 ounces)).
- Wipe off the excess grease. Remove the top grease fitting. Install the plug.
- Operate the generator for one hour to allow the grease to expand and force excess grease from the cavity.
- Stop the engine. Install the plug in the bottom grease pipe and wipe off the excess grease.
- Install the louver assembly or install the rear plate.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Lubricate shielded ball bearings at 2000 hour intervals
- Do not mix greases
Full service-parts list: Caterpillar 3406 →, Caterpillar 3406E →, Caterpillar 3412C →, Caterpillar SR4B →
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.