Cummins/Onan — Fuel Pump Installation
Repair & overhaul
From a Cummins/Onan owner's manual covering: K1800, K2000E, K38, K50, KT38, KTA38, KTA50, KTTA38, KTTA50, KtA38, KtA50, KttA38. Check it applies to your exact model before use.
Applies to: Cummins/Onan K38, Cummins/Onan K50, Cummins/Onan KTA38, Cummins/Onan KTA50, Cummins/Onan K38 and K50 engine
Procedure
- Install the drive coupling, gasket, fuel pump, and four capscrews; tighten the capscrews to 45 Nm [35 ft-lb].
- Connect the fuel tubing and air hose.
- Install the bracket mounting capscrew and air lines if applicable.
- Connect the electric wires to the fuel shutoff valve.
- Install the linkage to the throttle lever.
- Connect the positive battery cable first, then the negative cable.
- Operate the engine to normal operating temperature and check for leaks.
Specs & values
- Fuel pump mounting capscrew torque: 45 Nm [35 ft-lb]
- All K38 and K50 engines use a white nylon or light green fuel pump drive coupling
Full service-parts list: Cummins/Onan K38 →, Cummins/Onan K50 →, Cummins/Onan KTA38 →, Cummins/Onan KTA50 →
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.