KANGDA 2QT38 (BH2QT90R9) – Fuel Pump Assembly For Liuzhou 2115 Diesel Engine

The KANGDA 2QT38 fuel injection pump, carrying the order code BH2QT90R9, supplies precisely metered high-pressure fuel to the Liuzhou 2115 two-cylinder industrial power unit. Engineered for continuous-duty applications, this mechanical BQ-series pump sustains stable fuel delivery under fluctuating loads, directly supporting the rated 37.1 kW net output at 2400 engine RPM. For workshops across Africa and Southeast Asia, this unit offers a straightforward service solution for compact construction equipment and agricultural machinery that relies on robust, electronically untethered injection systems.

This BH2QT90R9 pump is primarily fitted to the Liuzhou Diesel 2115 engine series, commonly found in 3-tonne forklifts, mini excavators (1.5–2.5T class), vibratory rollers, and small agricultural tractors (25–35 HP range). Beyond the Liuzhou brand, the same pump interface appears on certain ChangChai 2115 and Yuchai 2115 variants, though users must verify the drive gear orientation and fuel feed direction before installation. In Southeast Asian markets, this pump is frequently sourced for re-powering older Mitsubishi and Isuzu industrial engines where original parts are discontinued. For African mining and construction sites, where fuel quality varies widely, the mechanical governor in this pump tolerates lower cetane numbers better than electronic systems, making it a preferred stock item for site maintenance depots.

Accurate installation begins with setting the engine's flywheel to TDC (Top Dead Centre) on the compression stroke for cylinder No. 1. The pump drive gear has a punch mark that must align with the idler gear timing dot – a mismatch of even one tooth alters injection advance by approximately 6° crankshaft angle, directly affecting combustion efficiency and exhaust temperature. Using a dial gauge through the delivery valve port, measure the plunger lift at 0.2 mm before the port closing point; factory nominal value is 5.8–6.2 mm for this model. After bolting the pump flange, manually rotate the engine two full turns and re-check alignment – a step often skipped but critical for preventing bent pushrods or scored cylinder walls. Always replace the crush washers on the high-pressure outlets and apply a thin film of clean diesel to the plunger during initial assembly to avoid dry-scuffing on first start.

While global on-highway trucking increasingly adopts common rail systems, the KANGDA BH2QT90R9 remains economically superior for off-road equipment because it requires no diagnostic laptops, no injector coding, and minimal electrical infrastructure. Repair shops can overhaul this pump with basic hand tools – replacing the plunger/barrel set, delivery valves, or governor spring typically costs under 15% of a new unit. For distributors serving Nigerian, Kenyan, or Indonesian customers, the key sales argument is predictable service intervals (typically 2000–2500 hours between major overhauls) and the availability of aftermarket rebuild kits. The pump's hydraulic governor also compensates for viscosity changes in low-grade diesel better than electronic equivalents, reducing unexpected downtime at remote job sites.

Q1: What is the difference between 2QT38 and 2QT39?
A: The 2QT38 is calibrated for 2400 RPM with a 37.1 kW load profile, while the 2QT39 suits higher-speed engines (2600+ RPM) with a stiffer governor spring. Swapping them alters the torque delivery.

Q2: Can this pump handle high-sulfur diesel (500–2000 PPM)?
A: Yes – the hardened plunger/barrel tolerates sulfur well. However, acidic by-products accelerate cam follower wear, so reduce oil change intervals accordingly.

Q3: What is the typical lead time from Asian suppliers?
A: New OEM units are usually available ex-stock from major Guangzhou or Singapore distributors within 48 hours. Rebuilt bench-calibrated units take 3–5 working days.

Q4: How do I time the pump if the drive gear timing mark is missing?
A: Use the plunger lift method with a dial gauge. At engine TDC, rotate the pump until plunger lift reads 5.9 mm, then lock the gear – this is Liuzhou's approved backup procedure.

Q5: Does the pump include the low-pressure feed pump?
A: No, this is the high-pressure pump only. The separate lift pump mounts on the engine block. If feed pressure drops below 0.2 bar, the main pump will cavitate and lose power under load.

Q6: When should I replace the plunger and barrel?
A: Symptoms include gradual power loss, white smoke on cold starts turning to black smoke under load, and extended cranking. A bench test showing plunger clearance beyond 0.03 mm indicates mandatory replacement.