Cummins/Onan — Changing Sensitivity Reference
Adjustments · Voltage regulator VR21
From a Cummins/Onan service manual covering: DL4, DL6, DL6T, DL6U. Check it applies to your exact model before use.
Applies to: Cummins/Onan DL4, Cummins/Onan DL6, Cummins/Onan DL6T
Before you start
- Do not mark on printed circuit boards with a pencil; graphite lines are conductive.
Procedure
- Unsolder W1 on VR21 at hole F for frequency sensitive.
- Resolder W1 to hole S for semi-frequency sensitive.
- Resolder W1 to hole N for non-frequency sensitive.
Tools required
- soldering iron Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan DL6 →
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.