Cummins/Onan — Voltage Adjustments
Adjustments · voltage regulator
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKA, Cummins/Onan HDKAL/HDKAS engine
Before you start
- HAZARDOUS VOLTAGE! Touching uninsulated live parts inside the output box can result in severe personal injury or death.
Procedure
- Remove the protective cover for access to the voltage adjusting pot and 50/60 Hz selector switch.
- Check the position of the 50/60 Hz selector switch and change it if necessary.
- Adjust no-load voltage as required and replace the cover.
Tools required
- tools with insulated handles Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- The V/HZ break point pot is factory sealed and must not be adjusted.
Full service-parts list: Cummins/Onan HDKA →
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.