KANGDA 2QT84 | BH2QT90R9 Fuel Injection Pump For Jiangdong 2110 Engine

Designed specifically for the Jiangdong 2110 power unit, the KANGDA 2QT84 (BH2QT90R9) two-cylinder in-line diesel injection pump delivers precise fuel metering at 2400 RPM supporting a rated output of 25.73 kW. This mechanical assembly serves as a direct-fit solution for agricultural and industrial diesel applications, offering workshops a dependable replacement option that maintains cold-start consistency and extends service intervals on compact power plants.

This pump features a plunger diameter engineered for the 2.0L to 2.5L displacement class, paired with an 8mm cam lift that enables stable governing across varying load conditions. The hydraulic head adopts the BQ series architecture, valued for its resistance to scoring when operating with high-viscosity or aged diesel fuel. Maximum injection pump speed reaches 2100 RPM, while the flange mounting diameter of φ68mm ensures accurate alignment with the Jiangdong 2110 bell housing. Thread specifications include an M12×1.25 outlet valve holding thread, compatible with standard high-pressure line fittings used on European tractor retrofits. A mechanical governor adjusts fuel volume relative to engine load, a critical function for preserving the 25.73 kW power band at the rated speed.

Cleanliness during installation directly determines the service life of the BH2QT90R9 assembly. All connecting points must be thoroughly cleaned before high-pressure lines are loosened-contaminants entering the plunger and barrel clearance often cause premature seizure. Flange mounting requires careful handling of the timing shims; their correct positioning preserves the Jiangdong 2110's static injection timing. After the pump is secured, air bleeding should be performed at the fuel return pipe connecting thread (M14×1.25) . Governor spring tension must be checked against factory settings to guarantee proper idle regulation. Workshops should always fit new O-rings during reassembly, as reused elastomers rank among the most frequent sources of low-pressure fuel weepage on this series.

Calibration targets the Jiangdong 2110  diesel block, placing this pump into single-cylinder retrofit packages, small-scale harvesters, and stationary gensets. Its footprint also suits other 2-cylinder blocks that share the BQ pump mounting pattern. For service centers handling Chinese agricultural machinery or European compact tractors retrofitted with Jiangdong engines, the 2QT84 order number corresponds directly to the original equipment specification. The mechanical governor response at 2400 RPM proves particularly advantageous for PTO-driven implements requiring steady torque delivery without hunting or stall tendency.

Rebuilding the plunger and barrel assembly returns approximately 95% of original flow efficiency at substantially lower cost than a complete fuel system replacement . Although this pump operates mechanically, its integration with the engine's fuel supply circuit remains straightforward-adequate feed pressure to the high-pressure section is maintained without complex electronic diagnostics, making it a practical choice for workshops that prioritize rapid turnaround on agricultural service work.

Q1: Will the BH2QT90R9 bolt onto my Jiangdong 2110 without changing existing pipework?
A: Absolutely. The flange pattern and M12×1.25 outlet threads match the original Jiangdong layout. No pipe bending or adapter fittings are required for installation.

Q2: What kind of running hours can I expect from this pump before the head wears out?
A: With clean fuel and regular filter changes, the plunger and barrel typically deliver 2,500–3,000 operating hours. Poor water separation or off-spec diesel will shorten that figure considerably.

Q3: How does this pump differ from the BQ2000 series?
A: The BH2QT90R9 follows the standard BQ architecture but uses a distinct camplate profile optimized for 25.73 kW at 2400 RPM. BQ2000 variants often feature different lift characteristics not suited to this torque curve.

Q4: White exhaust appears during cold starts after fitting a new KANGDA pump. What is wrong?
A: This usually points to a timing offset. Double-check the static alignment marks; even a one-tooth timing error delays injection and produces unburned fuel. Adjust the shim pack thickness if recalibration fails.

Q5: Are overhaul kits (plungers, delivery valves) available for order number 2QT84?
A: Yes. KANGDA supplies full service kits under dedicated part numbers. Use only genuine components to preserve valve seat hardness and prevent nozzle dribble.