3512B Engine Caterpillar

A standby generator set may not be used often. The generator set maybe needed for operation in an emergency situation. Maintenance of the standby generator set is important for the following reasons:

• The generator set must always be in excellent operating condition.

• The generator set must be ready to work under load at any time.

Establishing a Preventive Maintenance Program will provide these benefits:

• Maximum availability of the standby generator set

• Longer service life for the generator set

• Minimum of expensive repairs

Your Caterpillar dealer can help you to establish an effective Preventive Maintenance Program for your generator set. Consult your Caterpillar dealer for details.

Maintenance and Operation Procedures

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The high voltage that is produced by an operating generator set can cause severe injury or death. Before performing any maintenance or repairs, ensure that the generator will not start. Place the engine control switch in the "OFF" position. Attach "DO NOT OPERATE" tags to all starting controls. Disconnect the batteries or disable the starting system. Lock out all switchgear and automatic transfer switches that are associated with the generator.

The recommended maintenance for the engine is listed in this Operation and Maintenance Manual, "Maintenance Interval Schedule" (Maintenance Section).

For the recommended generator maintenance, see the Operation and Maintenance Manual for the generator.

Maintenance and Repair

The maintenance that is recommended for Every Week can be performed by an authorized operator. The maintenance that is recommended for the subsequent maintenance intervals must be performed by an authorized service technician or by your Caterpillar dealer.

Unless other instructions are provided, perform maintenance and repairs under the following conditions:

• The engine is stopped.

• The starting system is disabled.

• The generator does not pose an electrical shock hazard.

Operation

To ensure proper operation, the generator set must be exercised regularly. For instructions on operating the generator set, see the Operation and Maintenance Manual for the generator set control panel.

For these operation procedures, follow the instructions that are provided in this Operation and Maintenance Manual, "Operation Section": starting the engine, engine operation and stopping the engine.

Record Keeping

Maintain a record in order to document these items: gauge readings, maintenance that is performed, problems and repairs.

Space Heaters

Moisture will damage to generators and other electrical equipment. Make every effort to keep the generator set as dry as possible.

Generators can operate without problems in humid environments. However, problems can occur when the generator is inactive. Moisture can condense on the windings. The condensation of moisture can result in poor performance. Also, damage to the windings can occur.

Use space heaters in order to help keep the windings dry. When the generator is not active, ensure that the space heaters are operating. When the generator is operating, turn OFF the space heaters.

Service Hours and Fuel Consumption

Table 1

3512B Marine Auxiliary Engine Service Hours and Fuel Consumption (1)
Interval	Rated 1601 to 1800 rpm(1)
250 service hours	48 500 L (12,800 US gal) of fuel
500 service hours	97 000 L (25,600 US gal) of fuel
1000 service hours	194 000 L (51,200 US gal) of fuel
2000 service hours	388 000 L (102,400 US gal) of fuel
3000 service hours	582 000 L (153,600 US gal) of fuel
6000 service hours	1 164 000 L (307,200 US gal) of fuel
Top end overhaul	7,500 service hours
	1 500 000 L (395 000 US gal) of fuel
Second Top End Overhaul	15,000 service hours
	3 000 000 L (790 000 US gal)
Major overhaul	22,500 service hours
	4 500 000 L (1 185 000 US gal) of fuel

(1)	Fuel consumption is based on a load factor of approximately 60 percent.