Cummins/Onan — Adjusting Voltage (AVR)
Adjustments · Automatic voltage regulator
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDKAA, Cummins/Onan MDKAB, Cummins/Onan MDKAL, Kubota D1005 engine, Kubota D1105 engine, Kubota V1305 engine, Kubota V1505 engine
Before you start
- HAZARDOUS VOLTAGE: touching uninsulated live parts can cause severe personal injury or death.
Procedure
- Disconnect all generator loads.
- Check 50/60 Hz selector switch position and change if necessary.
- Start genset and turn voltage adjusting pot to obtain rated output voltage.
- Check and readjust frequency.
- Readjust voltage if frequency was changed.
Tools required
- Insulated tools Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Do not readjust the sealed V/HZ break point pot
Full service-parts list: Cummins/Onan MDKAA →, Cummins/Onan MDKAB →, Cummins/Onan MDKAL →, Kubota D1005 engine →, Kubota D1105 engine →, Kubota V1305 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.