COUPLING 7E8612 - Caterpillar

SR5 Generators
Prime
Caterpillar recommends replacement of the generator bearing at the major overhaul unless the generator is installed in any of the following conditions:
High temperature environment (refer to the temperature chart in this Operation and Maintenance Manual, "Generator Bearing - Lubricate" article.
Condensing humidity
Coastal environment
Chemical environment
Abrasive environmentIf any of these conditions exist, consult your Cat dealer for the appropriate checks:
alignment
environmental
environmental
exercising the generator
temperature
vibrationStandby
The generator bearings are shielded and greased for the life of the bearing. Some purging of the grease occurs normally with the bearings. Carefully adhere to the recommendations for the following conditions: temperature, vibration, contamination, and alignment. Over time, the bearing grease may deteriorate. This deterioration may cause the grease to lose lubricating properties.Caterpillar recommends the replacement of the bearing after 10 years of service in a standby application in normal conditions. If the bearing is installed in the following conditions, Caterpillar recommends replacement of the bearing in 5 years.
High temperature environment (Refer to the temperature chart in this Operation and Maintenance Manual, "Generator Bearing - Lubricate" article.
Condensing humidity
Coastal environment
Chemical environment
Abrasive environmentSR4 and SR500 Generators
All ball bearings should be cleaned. The cavity in the bracket for SR4 Generators should be repacked with 2S-3230 Grease. The cavity in the bracket for SR500 Generators should be repacked with 458-0955 Grease. Pack the ball bearings (one-third to one-half of the volume of the cavity).
Use an induction heater to heat the ball bearings to 107 °C (224.6 °F) for 10 minutes to install either of the following bearings: ball bearings that are new and ball bearings that have been inspected. Mount the bearings on the shaft. To reinstall the hub, heat the hub to 400 °C (752.0 °F) for 3 hours. Mount the hub to the shaft.
Ensure that the tube of the grease gun is filled with grease.
Remove the bracket drain plug and operate the generator for 1 hour. This procedure will allow the grease to expand. The expanding grease will force the excess grease from the cavity. When the excess grease is forced from the cavity, the internal pressure will be reduced. The generator should continue to operate until the grease stops purging.
Stop the engine. Install the bracket drain plug. Wipe off the excess grease.
For greasing intervals, follow the recommendations on the lubrication plate (if equipped) or refer to Maintenance Schedule, "Generator Bearing - Lubricate". Whenever the bearings are greased, repeat Step 1. DO NOT MIX GREASES.