Cummins/Onan — Fuel Pump - Remove and Install (STC)
Repair & overhaul
From a Cummins/Onan owner's manual covering: M11, M1i Series Engines, ps200da. Check it applies to your exact model before use.
Applies to: Cummins/Onan M11 engine
Procedure
- Disconnect the battery cables.
- Clean the fuel pump and surrounding area.
- Remove the wire to the fuel shutoff valve.
- Remove the linkage from the throttle lever.
- Remove the fuel tubing and air tube: fuel drain line, gear pump cooling drain, gear pump suction line, fuel supply to injectors, AFC air supply tube, tachometer cable.
- Remove the two fuel pump support bracket to cylinder block bracket mounting capscrews.
- Remove the four fuel pump mounting capscrews and the fuel pump.
- Remove the drive coupling.
- Clean the gasket surfaces of the pump support and the air compressor.
- Install the fuel pump drive coupling and use a new gasket.
- Install the four fuel pump mounting capscrews and two support bracket capscrews.
- Install the AFC air tube and fuel tubing.
- Install the electric wire to the fuel shutoff valve and the linkage to the throttle lever.
- Install the battery cables.
Specs & values
- Fuel pump mounting capscrew torque: 47 Nm [35 ft-lb]
- Support bracket capscrew torque: 47 Nm [35 ft-lb]
- Fuel shutoff valve wire nut torque: 3 Nm [25 in-lb]
Source: Cummins/Onan owner'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.