Weifu 4987471 Fuel Injection Pump Assembly

The 4987471 fuel injection pump is a PT (Pressure-Time) type metering unit designed for Cummins NTA855 series six-cylinder diesel engines. It features a mechanical governor with throttle control and shutdown solenoid provision. The pump assembly includes the gear pump, governor, and AFC (Air Fuel Control) module calibrated to specific engine torque curves (calibration codes KH69, KF11, KF49). It is engineered to deliver precise fuel metering across the operating speed range for heavy equipment duty cycles. Constructed with high-strength alloy housing and hardened internal components to withstand high-pressure fuel delivery and contaminated fuel environments. The unit is a direct replacement for Cummins OEM part numbers 4987471 and 2865691. Calibration code verification against engine CPL (Control Parts List) is mandatory prior to installation to ensure correct fueling and emissions compliance.