GEAR 3T5929 - Caterpillar

Procedure for Bearing Service
Perform periodic bearing lubrication at the intervals that are shown in Table 1. Use the following instructions as the suggested procedure to service the bearings of the generator.Note: If the generator already has a visible grease point, go to Step 4.
Stop the generator set. Remove the required external cover plates, grills, and louvers of the generator to access the bearings.
Remove the top grease pipe plug and the lower grease pipe plug. If no grease pipes can be found, then locate the insert for the grease pipe. The insert is on the bearing brackets. Remove the inserts. Install the grease pipes.
Install a grease fitting in the top grease pipe.
Use a Cat® 8F-9866 Grease Gun or equivalent grease gun to grease the bearings. Use the appropriate type of grease and the quantity that is listed in Table 1. Avoid the use of alternate types of grease. Usage of alternate types of grease could cause premature bearing failure.Note: Add only the amount of grease listed in Table 1. Do not continue to add grease until purging is observed. Purging of grease will not always be observed.
If grease fittings are permanently installed, ensure that the protective caps for the grease fittings are installed on the fittings when finished. If a grease fitting was installed in Step 2, remove the top grease fitting and install the plug that was removed. If applicable, do not install the plug on the bottom grease location yet. Wipe off the excess grease.Note: Do not allow grease to drip on the stator windings of the generator. The stator windings that are exposed to grease could suffer degraded insulation. The degraded insulation would cause a reduction in the life of the windings.
Operate the generator set at rated speed for approximately 1 hour. When running the engine more than 30 minutes, the recommended engine load to apply is a minimum of 50%. The procedure will allow the grease to expand. The expanding grease will force the excess grease from the cavity. The internal pressure will be reduced as the excess grease is forced from the cavity. Operate the generator until no grease is forced out of the cavity.
Stop the generator set. Inspect the generator windings, grease tubes, and bearing housings. Wipe off any excess grease. If a grease pipe plug was removed in Step 2, install the plug in the bottom grease pipe. Wipe off any excess grease.Note: Do not allow grease to drip on the stator windings of the generator. The stator windings that are exposed to grease could suffer degraded insulation. The degraded insulation would cause a reduction in the life of the windings.
Install all the external cover plates, grills, and louvers of the generator that were removed to access the bearings.
Table 1
Bearing
Part Number Bearing
Type Frame Size Temperature
Maximum(1) Grease
Part Number Interval Weight Volume Shaft
Diameter
5P-2448
Ball Bearing 315 BC
160 mm (6.3 inch) OD
75 mm (3 inch) ID 580
590 85° C (185° F) Refer to Special Instruction, REHS4892, "Generator Bearing Service" Every 2000 service hours or