KANGDA 2QT85 / BH2QT95R9 – Direct-Fit Injection Pump For 2115 Power Units

This KANGDA BH2QT95R9 in-line fuel pump (order reference 2QT85) delivers mechanical high-pressure fuel metering for two-cylinder 2115 diesel engines. Built around a 9mm plunger and mechanical governor, this unit replaces worn OEM pumps on Weifang Kaiwo power plants rated at 37kW @ 2400 RPM. Workshops handling agricultural tractors, compact gensets, and irrigation pumps will recognise this as a straight swap solution that restores factory-fresh starting behaviour, throttle authority, and smoke control without reprogramming or laptop diagnostics.

The BH2QT95R9 belongs to the BQ pump family, characterised by its flange-mounted body and gear-driven camshaft. Plunger stroke and delivery valve opening pressure are preset to match the 2115 engine's combustion chamber design. The mechanical governor incorporates a torque spring that adjusts fuel quantity according to load, preventing lugging during PTO operations. Every pump leaves calibration with delivery uniformity within ±2% across all cylinders at rated speed. The mounting stud pattern mirrors the original 2QT series, so no adapter plates or timing gear swaps are needed. For shops that flow-test on-site, the fuel delivery curve can be verified using a standard test bench with 9mm plunger adaptors.

This pump is purpose-mapped for the Weifang Kaiwo 2115 – a naturally aspirated two-cylinder diesel widely spec'd into 25–40 HP utility vehicles. You will encounter it in walk-behind rollers, small balers, and 30 kVA standby generators where parts availability and mechanical simplicity rank higher than electronic refinement. The BH2QT95R9 supersedes multiple older 2QT revisions, offering improved cold-start advance and reduced idle instability. Unlike common-rail retrofits, this mechanical pump tolerates variable fuel quality and requires no VIN coding, making it a workshop favourite for rapid turnaround. For dealers, stocking this number covers a significant slice of the Chinese-built compact diesel segment active in African, Southeast Asian, and South American markets.

Correctly installing the BH2QT95R9 demands more than bolting it on. Rotate the engine to TDC compression on cylinder one, then verify the timing mark on the pump drive gear aligns with the idler gear reference. The gear is often keyed, but backlash must be checked with a dial gauge – excessive clearance alters injection onset by several degrees. High-pressure hard lines should be finger-started before torquing to prevent cross-threading; use a crowfoot wrench for the injector union nuts to avoid overtightening. Bleed the low-pressure circuit via the vent screw until fuel free of air bubbles emerges. After startup, listen for irregular knocking – this indicates timing off by more than 2°. A simple spill-timing procedure using a graduated tube can confirm static timing without specialised electronics, a technique many older manuals still recommend.

This table underscores why operators of 2115 engines prefer the mechanical route – lower overheads, faster turnaround, and no software lockouts. A worn plunger or delivery valve on the BH2QT95R9 can be swapped in under an hour, whereas a common-rail pump failure often sidelines equipment for days while waiting for programming.

Q1: Will this pump fit a 2115 engine not originally equipped with a KANGDA badge?
A: Yes, provided the engine uses the BQ-style mounting flange and 9mm plunger. Check your old pump's model tag – if it ends with R9, the BH2QT95R9 drops straight in. Different governor spring rates may exist for marine vs agricultural use, but this unit matches the standard 37kW tractor calibration.

Q2: How do I distinguish genuine KANGDA from copycat pumps?
A: Authentic units carry a laser-etched order number 2QT85 on the governor cover and a distinct bronze-coloured delivery valve holder. Copies often omit the torque spring or use softer plunger steel, leading to rapid timing drift within 200 hours.

Q3: What fuel filter micron rating should precede this pump?
A: Fit a 10-micron primary and 5-micron secondary filter ahead of the feed pump. The BH2QT95R9's plunger clearance is tight – debris larger than 6 microns accelerates scoring and reduces delivery below 37kW output.

Q4: Can I adjust the max fuel screw to gain extra horsepower?
A: Technically yes, but we advise against it. Turning the fuel stop screw raises EGTs and can melt pistons on a naturally aspirated 2115. The pump is pre-set at the factory; any tampering voids performance guarantees and may fail emissions checks in regulated regions.

Q5: Is a prime pump necessary after fitting a new unit?
A: Absolutely. The 2115's lift pump may not self-prime through an empty injection pump. Use the manual primer lever on the feed pump until the vent screw flows clear fuel – cranking with trapped air can seize the plunger due to inadequate lubrication.