2QT24 | BH2QT85R9 – In-Line Fuel Pump For 2113 Diesel Power Units

This KANGDA pump, identified by order code 2QT24 and model BH2QT85R9, is factory-calibrated for the 2113 engine family at a governed speed of 2600 rpm. Manufactured to Yongkang OEM specifications, this mechanical unit feeds high-pressure fuel to each cylinder through a precision plunger-and-barrel set. Workshops servicing Chinese-built agricultural and industrial machinery will recognize this as a direct retrofit for the original equipment fuel delivery module.

A hydraulic governor governs the BH2QT85R9, with its rated speed locked to the 2113 camshaft timing. An 8.5 mm plunger diameter dictates the fuel displacement per stroke, while the outlet valve uses an M12x1.25 thread for secure high-pressure line attachment. Mechanical advance built into the housing shifts injection timing relative to engine load, a feature critical for maintaining combustion stability. Bench tests performed before shipment verify uniform fuel output across all delivery ports, so cylinder-to-cylinder variation stays within factory tolerances. The camshaft lift profile matches the 2113's valve events, which reduces the likelihood of nozzle coking during extended idle periods. Yongkang's calibration data is stored in the pump's governor spring setting, making this unit ready to run without additional dyno tuning after mounting.

This pump sees regular use in 2113 engines powering compact tractors, wheel loaders, and backup generator sets. The Yongkang OEM designation guarantees that the mounting flange, drive gear mesh, and fuel injector line connections align without adapter plates. Aftermarket pumps lacking this specific calibration often produce excessive black smoke or throttle lag, but this unit preserves the factory fuel delivery map from idle to maximum rpm. For parts distributors, stocking this single SKU covers a wide swath of 2113-powered equipment sold through Chinese machinery dealers.

Mounting begins by rotating the engine to TDC and aligning the pump drive gear with the timing mark on the housing. Torque the flange fasteners to the specified value; overtightening distorts the body and may bind the internal plunger. Before starting, crack the outlet valve holders and crank the engine until air-free fuel escapes, then retighten. The fuel shut-off solenoid receives power from the ignition circuit, and its stroke must be verified to ensure complete engine cut-off. Check the governor spring for signs of sagging-a stretched spring raises the no-load speed beyond safe limits. If the engine shows rough idling or hesitation under sudden acceleration, recheck the static timing with a dial indicator on the plunger. Replace all crush washers on the high-pressure ports to avoid air intrusion, which causes erratic running. Never substitute this with a BH2QT80R9; the different plunger size and cam profile make them non-interchangeable.

Although the 2113 series relies on a conventional in-line pump rather than a common rail system, this component remains the heart of its fuel metering. Rebuilding the BH2QT85R9 with fresh plungers, delivery valves, and governor springs costs significantly less than a new pump, and shops can perform the overhaul in-house with standard tools. Correct pump function directly influences fuel consumption and keeps exhaust gas temperatures within acceptable ranges for prolonged heavy loading. Adjusting the maximum fuel limiter allows operators to tailor power output for specific jobs, such as PTO-driven implements or hydraulic pumps. Using a genuine KANGDA replacement ensures the injector nozzles receive consistent pressure, which extends their service window and reduces downtime for the end user.

Q1: What engine serial number range matches this pump's calibration?
A: The BH2QT85R9 fits all 2113-series blocks with a 2600 rpm factory rating. Verify your engine's data plate; if the rated speed differs, governor response will deviate from the intended curve.

Q2: Will this pump work with biodiesel blends?
A: Yes, but B20 or higher may reduce internal lubricity. Using an appropriate additive is advised to protect the plunger and barrel from premature scuffing.

Q3: How do I distinguish a worn delivery valve from a faulty plunger?
A: Leakdown during idle suggests plunger wear, while erratic cylinder contributions point to delivery valve sticking. A pop test on the bench clarifies which component needs replacement.

Q4: Is an external fuel cooler required for this pump?
A: Not standard. The 2113 installation relies on engine coolant circulation and air convection; however, retrofit turbocharged applications may benefit from additional cooling.

Q5: What torque value applies to the high-pressure outlet nuts?
A: Set your wrench to 25–30 Nm for the outlet valve holders. Over-torquing distorts the sealing face and invites fuel seepage.