Kohler — Voltage Regulator Adjustment Procedure

Adjustments

From a Kohler service manual covering: 10REOZD, 15REOZD, 20REOZD. Check it applies to your exact model before use.

Applies to: Kohler 10REOZD, Kohler 15REOZD, Kohler 20REOZD

Procedure

1. Verify that the generator set master switch is in the OFF/RESET position.
2. Turn the Volts/Hz and the stability potentiometers fully counterclockwise. Connect the voltmeter to the AC circuit or an electrical outlet.
3. Move the generator set master switch to the RUN position.
4. Change the voltage adjustment control at the controller until the desired output voltage is achieved.
5. Rotate the stability potentiometer clockwise until light flicker minimizes.
6. Readjust the voltage adjustment control at the controller until the desired output voltage is achieved.
7. If the engine has a speed adjustment governor, adjust engine speed to the specified cut-in frequency.
8. Rotate the volts/Hz potentiometer clockwise until the voltage level begins to drop.
9. Readjust the engine speed to 1800 rpm for 60 Hz models or 1500 rpm for 50 Hz models.
10. Readjust the voltage adjustment control until the desired output is achieved.
11. Readjust the stability potentiometer until light flicker minimizes.
12. Move the generator set master switch to the OFF/RESET position.

Full service-parts list: Kohler 10REOZD →, Kohler 15REOZD →, Kohler 20REOZD →

Source: Kohler 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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