KANGDA 2QT54 / BH2QT95R9 – Fuel Pump Set For LN2110D Industrial Engine

Direct-fit replacement injection pump engineered for the Laien LN2110D four-cylinder diesel, the KANGDA 2QT54 (pump core BH2QT95R9) restores factory fuel metering without reprogramming or governor recalibration. This unit matches the original 1800 RPM governing curve and sustains the rated 22 kW net output, making it a workshop-ready solution for tractors, small gensets, and agricultural auxiliaries that rely on this Chinese powerplant. Every calibration parameter-from plunger stroke to delivery valve hold pressure-mirrors the OEM release specification, so technicians avoid the performance drift common with unbranded swap-ins.

The BH2QT95R9 pump head exclusively serves the LN2110D block, a platform found in 40–60 HP class equipment across European livestock operations and American horticultural farms. This model employs a 9mm plunger and a mechanical flyweight governor that reacts to load changes within the 1800 RPM sweet spot. Unlike universal pumps that require external timing shims, this KANGDA unit bolts directly to the engine gear case using the standard LA flange pattern. The drive shaft incorporates a Woodruff key slot dimensioned to Laien's original drawing, eliminating the need for aftermarket adapters. Workshops should note that this pump is not interchangeable with LN2108 or LN2115 variants, as the cam profile and fuel delivery angles differ significantly.

Prior to mounting the 2QT54, rotate the LN2110D crank to cylinder #1 compression TDC and confirm the gear case pointer aligns with the pump drive gear's etched mark. The BH2QT95R9 body uses a left-hand thread on the shaft retaining nut-counterclockwise to tighten-a detail often overlooked during rushed replacements. After bolting the flange, prime the low-pressure circuit by operating the hand primer until fuel free of air bubbles exits the return line. Then crack each delivery valve holder one full turn, crank the engine briefly, and retighten to 35 Nm. This bleeding sequence prevents dry starts that score the 9mm plunger within the first revolution. Always replace the copper sealing washers under the banjo fittings; reused washers frequently cause suction leaks that mimic pump wear.

Workshops frequently misread surging or black smoke as injector trouble, yet the BH2QT95R9 governor linkage often accumulates varnish that restricts flyweight travel. Cleaning the governor pivot pins restores response in about 30% of returned "failed" pumps. However, when the 9mm plunger shows vertical scoring or the delivery valve seat erodes, recalibration alone cannot salvage the unit. Given that OEM repair kits for this pump are scarce, swapping in a complete KANGDA 2QT54 assembly typically costs less than a bench rebuild plus dyno testing-especially when shop labor exceeds $120/hour. The mechanical governor's oil bath needs draining and refilling with SAE 10W every 500 engine hours; neglect leads to sticky weights and unstable idle.

For aftermarket distributors, the KANGDA 2QT54 fills a reliable niche: Laien-powered import equipment remains active in hay balers, irrigation pumps, and portable welders, yet factory support for the LN2110D has dwindled since 2019. This pump's BH2QT95R9 configuration delivers the same fuel volume per stroke as the original, preserving the 22 kW output without leaning out the air-fuel ratio. Dealers who stock this SKU reduce customer comebacks because the pre-set governor eliminates on-site tuning-a feature mechanics appreciate during peak harvest seasons when downtime costs more than the part itself.

Q1: Can this pump run on a LN2110D with a different injector nozzle?
A: No. The BH2QT95R9 delivery valve timing assumes factory nozzles with 220 bar opening pressure. Swapping nozzles shifts the injection window and reduces power.

Q2: What causes the governor to hunt after installing a new 2QT54?
A: Air trapped in the governor housing, not a pump defect. Vent the housing via the bleed screw while idling for 2 minutes.

Q3: Is there a break-in procedure for this replacement unit?
A: Run the engine at 1200 RPM for 10 minutes without load, then check all fuel line joints for seepage before full-load operation.

Q4: How do I identify a counterfeit BH2QT95R9 visually?
A: Genuine KANGDA units have a laser-etched batch code on the flange face. Counterfeits often omit this or use printed ink that rubs off.

Q5: Does this pump include the shut-off solenoid?
A: No. The 2QT54 assembly supplies the mechanical pump only. Reuse your existing stop solenoid or purchase it separately.