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Caterpillar — Generator Isolating for Maintenance

Maintenance

From a Caterpillar owner's manual covering: 3456, C1G1-Up, C2T1-Up, C3G1-Up, C4G1-Up, SR4B. Check it applies to your exact model before use.

Applies to: Caterpillar SR4B

Before you start

  • High voltage hazard

Procedure

  1. Stop the engine.
  2. Attach DO NOT OPERATE tag to starting circuit.
  3. Disconnect generator from distribution system.
  4. Lock out circuit breaker and tag.
  5. Remove power, sensing, and control fuses.
  6. Tag generator excitation controls.
  7. Remove generator terminal box cover.
  8. Verify generator is de-energized with tester.
  9. Add ground straps to conductors or terminals.

Tools required

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Full service-parts list: Caterpillar SR4B →

Source: Caterpillar owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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