Caterpillar SR4B: Maintenance Interval Schedule (Standby)(Every Year)

Lubricating Process:

• 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 Bearing lubricant (53.28 ml (1.8ounces) to 59.20ml (2.0 ounces). Lubricate shielded ball bearings at 2000 hour intervals. Do not mix greases.

• Wipe off the excess grease. Remove the top grease fitting. Install the plug.

• Operate the generator for one hour. This 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 plug in the bottom grease pipe. Wipe off the excess grease.

• Install the louver assembly or install the rear plate.

When servicing or repairing electric power generation equipment:

• Make sure the unit is off-line (disconnected from utility and/or other generators power service), and either locked out or tagged DO NOT OPERATE.

• Remove all fuses.

• Make sure the generator engine is stopped.

• Make sure all batteries are disconnected.

• Make sure all capacitors are discharged.

The following contaminants should not be allowed to accumulate on the windings:

• dirt

• dust

• grease

• salt

• oil film

Check for vibration damage. Vibration may cause the following problems:

• loose fittings

• loose belts

• excessive noise

• cracked insulation

The following are susceptible to vibration damage:

• stator output leads

• protective sleeving

• insulation

• exposed electrical connections

• transformers

• fuses

• capacitors

• lighting arrestors

Test the main stator windings with a megohmmeter in the following situations:

• The generator set is started for the 1st time.

• The generator set is removed from storage.

• The generator set is operating in a humid environment. Test every three months.

• The generator set is not protected from the elements in an enclosed area. Test every three months.

• The generator set is installed in an enclosed area. This area needs to be low in humidity and this area needs to have steady temperatures. Test every 12 months.

• The generator set has not been run under load for three months. Test the generator set weekly. Use space heaters around the generator set if the generator is exposed to a sea water environment or if the humidity is above 75%. Also use space heaters is a test result was below was 3 megohmms.