Cummins/Onan — Adjusting Frequency

Adjustments · Genset wiring harness

From a Cummins/Onan service manual — check it applies to your exact model before use.

Applies to: Cummins/Onan HDKB

Procedure

1. Remove access cover on left end of genset.
2. Find leads marked J8 HZ, 60 HZ and 50 HZ in harness.
3. Connect 60 HZ or 50 HZ lead to J8 HZ as appropriate.
4. Secure access cover with 4 screws.

Full service-parts list: Cummins/Onan HDKB →

Source: Cummins/Onan 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.

More Cummins/Onan repair guides →