LC5000, LC6100, and LC7000 Electric Power Generation Caterpillar

Removal Procedure

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Personal injury or death can result from high voltage. When power generation equipment must be in operation to make tests and/or adjustments, high voltage and current are present. Improper test equipment can fail and present a high voltage shock hazard to its user. Make sure the testing equipment is designed for and correctly operated for high voltage and current tests being made. When servicing or repairing electric power generation equipment: Make sure the unit is off-line (disconnected from any utility and/or other generators that can provide power service), and either lock out or tag as "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. Failure to do so could result in personal injury or death. Make sure residual voltage in the rotor, stator and the generator is discharged.

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High voltage may be present. The power source must be disconnected before working on the equipment. Failure to disconnect the power source could result in injury or death. Verify that the equipment is not energized before performing any maintenance. This work must be performed by trained personnel with correct tools and procedures.

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Bodily contact with electrical potential can cause bodily injury or death. To avoid the possibility of injury or death, ensure that the main power supply has been disconnected before performing any maintenance or removing any modules.

1. Open the AC breaker.

2. Disconnect the DC battery supply.

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Illustration 1	g03334469

3. Remove lifting eye (2) and terminal panel (1) .

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Illustration 2	g03334472

4. Remove air inlet screen (3) .

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Illustration 3	g03334476

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Illustration 4	g03334478

Note: Illustration (4) to show locations of wiring connections and mounting.

Note: There are negative and positive diode crescent assemblies. The blue leads are negative and the red leads are positive.

5. Mark orientation of clamps (5). Loosen clamps (5) .

6. Remove diode assembly wiring nuts (4). Remove mounting nuts (8) from diode support (6) .

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Illustration 5	g03334484

7. Remove varistor (7) .

   Note: Inspect condition of varistor. Replace discolored or damaged varistor if necessary.

8. Remove diode assemblies (9) .

Installation Procedure

1. Install diode assembly (9) in the reverse order of removal.