Caterpillar VR6 — Voltage - Adjust

Adjustments · VR6 voltage regulator

For the Caterpillar VR6, from the Caterpillar service manual.

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Procedure

1. Rotate voltage adjustment clockwise to increase voltage.
2. Rotate voltage adjustment counterclockwise to decrease voltage.
3. When jumper is installed between terminals 4 and 7, vary nominal generator voltage over operating range using voltage adjustment.
4. To use external voltage adjust rheostat: stop genset; remove jumper between terminals 4 and 7.
5. Connect external voltage adjust rheostat across terminals 6A and 7; rheostat should be rated at 10 kOhm.
6. Turn voltage adjustment on regulator fully clockwise for external adjustment to operate properly.

Source: Caterpillar service 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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