How to Replace Fuel Pump for Cummins Engine

This instruction will show you guide on how to do fuel pump replacement for cummins engine.

 

Preparation:

Newest Cummins Insite 8.6 8.4 Free Download

2021 Insite 8.7 Electronic Service Tool+Zapit ECM Password Removal+Fleet

 

Steps:

Remove all the fuel lines.

Remove control linkage.

Remove fuel shut off solenoid

 

NOTE:A diesel engine cannot tolerate dirt or water in the fuel system.A tiny piece of dirt or a few drops of water in the injection system may stop your unit.

Clean all external surfaces of the injection pump, including all line connections and fittings that are to be disconnected.

Clean the area around the injection pump gear cover to prevent dirt from entering the crankcase.

 

Removing the Fuel Pump

Locate TDC for cylinder number 1. Push the TDC pin into the hole in the camshaft gear while slowly barring the engine.

To prevent damage to the timing pin, be sure to disengage the pin after locating TDC.

 

14mm

Loosen the CAV injection pump lock screw and position the special washer, then tighten the lock screw against the pump drive shaft.

Torque Value:7 N·m  [5ft-lb]

 

3/8 Inch

Loosen the Stanadyne DB4 fuel injection pump lock screw and position the special washer.Tighten the lock screw until contact is made with the fuel injection pump drive shaft.

Torque Value:12 N·m  [9ft-lb]

 

10mm

The special washer on the Bosch injection pump must be removed so the lock screw can be tightened against the drive shaft.

Torque Value:30 N·m  [22 ft-lb]

 

22mm

Remove the gear cover access cap.

Remove the nut and washer from the fuel pump shaft.

 

75mm T-Bar Puller

Pull the fuel pump drive gear loose from the shaft

 

Caution:Do not remove the control lever.The lever is indexed to shaft during pump calibration.Removal of the lever will alter the fuel pump calibration and effect engine performance.

 

13mm

NOTE:Do not drop drive gear key when removing pump.

Remove the three mounting nuts.

Remove the fuel pump.