Denso RE571640 Fuel Injection Pump Assembly

The Denso HP4 series fuel injection pump (John Deere RE571640) is a camshaft-driven, high-pressure common rail unit designed for 9.0L 6-cylinder diesel engines. It generates injection pressures up to 2,000 bar to ensure optimal fuel atomization, combustion efficiency, and emissions compliance. The pump assembly includes an integrated suction control valve (SCV) operated at 24V for precise rail pressure regulation. It serves as a direct replacement for John Deere OEM part numbers RE571640, SE501922, SE501923, RE534156, RE546126, RE546121, RE519597, and AP51950. Applications span John Deere 6090HFU84 industrial engines and 6090-series power units installed in 8130, 8230, 8330, 8430, 8530, 9230, 8225R, and 8230T tractors, as well as 250D, 260E, 300D, and 310E articulated dump trucks and S650/S660/S670 combines. Constructed with hardened steel plungers, barrels, and a high-strength aluminum housing, the pump meets OEM durability standards for heavy-duty agricultural and construction duty cycles. Cross-references include Denso manufacturer numbers 294050-0660, 294050-0060, 294050-0061, 294050-0062, 294050-0063, 294050-0064, and 294050-0065. Remanufactured and new aftermarket versions are available from multiple suppliers with typical warranty coverage of 6 to 12 months.