Cummins/Onan NTA855 — Fuel Pump Control AC Connections (240 VAC to 120 VAC)
Installation · Day tank fuel pump control
For the Cummins/Onan NTA855, from the Cummins/Onan service manual.
Applies to: Cummins/Onan DFAB, Cummins/Onan DFAC, Cummins/Onan DFBF, Cummins/Onan DFCC, Cummins/Onan DFCE, Cummins/Onan NTA855, Cummins/Onan LTA10 engine, Cummins/Onan NT855 engine, Cummins/Onan NTA855 engine
Before you start
- Diesel fuel is highly combustible. Installation and service must be performed by trained and experienced persons in accordance with applicable codes.
Procedure
- Remove the two jumpers between terminals TB1-6 and TB1-7; connect one 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 120V.
- If equipped with a transformer, remove jumpers between H2 and H3; connect one between H1 and H3 and the other between H2 and H4.
- Attach a tag to the control box indicating the supply voltage.
Specs & values
- Factory set for connection to 240 VAC
- Terminals TB1-8 Amazon eBay FridayParts $87.88 and TB1-5 Amazon eBay NAPA $30.91 FridayParts $20.80 available for 120 or 240 VAC electric fuel shutoff valve rated not more than 0.5 amps
Full service-parts list: Cummins/Onan DFBF →, Cummins/Onan DFCC →, Cummins/Onan DFCE →
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.