104931-4040 (R11, 4900554) Diesel Fuel Injection Pump

This diesel fuel injection pump with OEM references 104931-4040 (R11) and 4900554 serves as a direct replacement for Cummins A1700 and A2300 series industrial diesel engines. Built to original equipment specifications, this VE-type rotary injection pump delivers consistent fuel metering across the full load range, giving workshops a cost-effective alternative to dealer-channel parts without sacrificing calibration accuracy.

The 104931-4040 / 4900554 operates on the VE rotary distributor principle, using a single plunger to pressurize and distribute fuel in firing order. The die-cast aluminum housing carries a protective surface treatment resistant to diesel exposure and heat cycles. Integrated solenoid shutoff and timing advance mechanisms use connectors positioned for straightforward harness attachment. The unit weighs approximately 18 kilograms and ships with protective caps on all ports to prevent contamination during storage.

Engineered for Cummins A1700 and A2300 diesel engines, this pump powers forklifts, excavators, wheel loaders, backhoe loaders, and stationary power units across agricultural, construction, and material handling sectors. It also matches certain truck and bus installations specifying the A-series platform. Because these engines remain widely deployed in off-highway and vocational fleets, parts availability directly impacts uptime. Verify drive configuration and governor type against the engine build sheet before ordering, as early and late variants differ in flange orientation and control lever geometry.

Pay particular attention to the fuel shutoff solenoid circuit-if it lacks proper voltage, the engine cranks but won't fire, mimicking pump failure when the fault lies in the harness.

Stocking the 104931-4040 / 4900554 addresses a recurring failure point in Cummins A-series industrial engines. These pumps typically fail through plunger and distributor head wear, producing declining power, erratic idle, and eventual no-start conditions. Because A1700 and A2300 engines remain in active service, demand stays steady rather than seasonal. A direct-fit replacement cuts bay time dramatically-swap-and-test beats chasing symptoms, and most experienced technicians complete the job in a single day.

Q1: Can I install this pump without recalibrating the governor?
A: Yes. It ships with factory-set linkage and delivery settings. Verify idle and maximum no-load RPM afterward; minor throttle linkage adjustment may be needed.

Q2: What causes the original 4900554 pump to fail prematurely?
A: Contaminated fuel. Water and particulate matter accelerate wear on the plunger, distributor head, and delivery valves. Always replace the filter and inspect the tank first.

Q3: Is it compatible with both A1700 and A2300 without modification?
A: It fits the A-series platform, but drive gear, flange, and lever variations exist between build years. Cross-reference the engine serial number and original pump tag.

Q4: How do I distinguish pump failure from lift pump or injector problems?
A: Test fuel delivery pressure at the pump inlet and return flow at the outlet. If inlet pressure is within spec but power is low, the injection pump or injectors are suspect.

Q5: Are remanufactured alternatives worth considering?
A: Reman units cost less but quality varies by rebuilder testing standards. For fleets prioritizing uptime, new production reduces repeat-failure risk.