Kangda 4QTF879ZH High Pressure Fuel Injection Pump Assembly

The Kangda 4QTF879ZH is a VE-type rotary distributor fuel injection pump designed for four-cylinder diesel engines in the Xinchai 490 series. It features a mechanical governor for stable speed control and a precision-machined rotor assembly for consistent fuel delivery across the operating range. The pump housing is constructed from high-strength alloy casting to withstand continuous high-pressure cycles. Internal components include hardened plungers, delivery valves, and a cam ring profile optimized for the target engine combustion characteristics. This assembly serves as a direct replacement for OEM part numbers including T3001225Z and cross-references BH4QT85R9, 4QTF74ZH, and 4QT72ZH-1. It is calibrated to factory specifications for injection timing and fuel quantity to ensure emissions compliance and engine performance recovery.