Cummins/Onan — Changing Generator Set Frequency
Adjustments · Control box frequency selection jumpers
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDKB, Cummins/Onan MDKBH, Kubota Z482 engine
Before you start
- When changing frequency, make sure the line circuit breakers are suitable for the new output.
Procedure
- Remove the control box cover.
- Connect J5 to P6 for 60 Hz.
- Disconnect J5 from P7 for 50 Hz.
- Apply the appropriate reconfiguration label.
- Replace the control box cover.
- Check and adjust voltage as necessary after the frequency has been changed.
Specs & values
- J5 to P6 = 60 Hz
- J5 from P7 disconnected = 50 Hz
Full service-parts list: Cummins/Onan MDKB →, Cummins/Onan MDKBH →, Kubota Z482 engine →
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.