Cummins/Onan — Day Tank / Fuel Transfer Pump Operation
Operation · Fuel transfer pump control
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DFE, Cummins/Onan DFEJ, Cummins/Onan DFEK, Cummins/Onan QSX15 engine
Before you start
- Continued operation with a CRITICAL LOW FUEL fault can lead to low fuel shutdown if the float switch fails.
Procedure
- Press the control ON switch for automatic operation; the green PUMP light comes on and the pump fills the tank.
- The tank level is automatically kept between pump-on and pump-off float gauge.
- The green PUMP light cycles on and off as fuel is pumped to maintain the proper level.
Full service-parts list: Cummins/Onan DFE →, Cummins/Onan DFEJ →, Cummins/Onan DFEK →
Source: Cummins/Onan operator's 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.