Cummins/Onan — Fuel Transfer Pump Control AC Connections (240 VAC to 120 VAC Conversion)
Adjustments · Day tank controller
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DFEJ, Cummins/Onan DFEK, Cummins/Onan QSX15-G9 engine
Before you start
- The control is set up at the factory for connection to 240 VAC.
Procedure
- Remove the two jumpers between terminals TB1-6 and TB1-7 and connect one jumper between TB1-5 and TB1-6 and the other between TB1-7 and TB1-8.
- Move selector switch S103 on the control PCB to the up position for 120 V.
- On the control transformer, remove the two jumpers between terminals H2 and H3 and connect one jumper between H1 and H3 and the other between H2 and H4.
- Attach a tag to the control box indicating the supply voltage.
Specs & values
- Terminals TB1-8 Amazon eBay FridayParts $87.88 and TB1-5 Amazon eBay NAPA $30.91 FridayParts $20.80 for a 120 VAC or 240 VAC electric fuel shutoff valve rated not more than 0.5 amps
Full service-parts list: Cummins/Onan DFEJ →, Cummins/Onan DFEK →
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.