2QT45 Fuel Injection Pump – Direct-Fit For YD2108 At 2200 RPM

This page details the KANGDA 2QT45 fuel injection pump, a bolt-on replacement unit tailored for the YD2108 diesel block. Designed around the engine's 27 kW output at 2200 rpm, this pump restores precise fuel metering and stable rail pressure. Workshops handling agricultural tractors, compact loaders, or stationary gensets will find this part matches the original equipment specifications without modification. The 2QT45 carries KANGDA's manufacturing heritage, ensuring the plunger and barrel assemblies meet the tolerances required for consistent cold starts and load response.

The YD2108 is a 2.144 L, two-cylinder indirect-injection diesel, wet-lined for thermal stability. At 2200 rpm, it develops 27 kW, a rating that demands accurate injection timing and volume. The 2QT45 pump delivers fuel at the correct pressure curve for this specific engine family, which powers numerous off-highway machines. Key specs include a Bosch-type flange mount, a mechanical governor for speed control, and a camshaft stroke optimized for the YD2108's combustion chamber design. The order number 2QT45 is the sole identifier for this calibration; substituting with a different pump risks altered timing and reduced torque. For parts buyers, verifying the engine serial number against the YANGDONG production range ensures a perfect match.

This engine and pump pairing appears across multiple sectors. In agriculture, the YD2108 drives small to medium tractors, rotary tillers, and rice transplanters. Construction applications include concrete mixers, plate compactors, and small dumpers. Stationary roles cover irrigation pumps and 20 kVA generator sets, where the 27 kW output at 2200 rpm provides reliable base load power. The 2QT45's mechanical simplicity makes it attractive for remote sites where electronic diagnostics are unavailable. Distributors stocking this part serve customers who prioritize uptime over complexity, as the pump's serviceable components allow field repairs with basic tools.

Before fitting the 2QT45, technicians must clean all fuel line connections and replace the in-line fuel filter to prevent debris from entering the new pump. The drive gear alignment marks on the YD2108 must be set to the timing pin position before removing the old unit. During installation, torque the mounting nuts to the factory specification, typically 25–30 N·m, and tighten the delivery valve holders progressively to avoid distorting the pump housing. After mounting, bleed the low-pressure circuit using the hand primer until bubble-free fuel exits the return line. Crank the engine without starting to confirm the shut-off solenoid engages and disengages correctly. Finally, use a timing light or dial gauge to verify that injection occurs at the specified crank angle, adjusting the shim thickness if necessary. Skipping these steps can lead to retarded timing, white smoke, or hard hot restarts.

The YD2108's direct-injection layout relies on the 2QT45 to generate adequate pressure for nozzle opening, typically above 250 bar. Any deviation in plunger stroke or delivery valve performance directly alters the injection rate, affecting combustion quality and exhaust emissions. Worn pumps often cause uneven running, increased fuel consumption, and soot loading in the lubricating oil. By fitting a genuine KANGDA 2QT45, workshops restore the original pressure-time characteristics, which prolongs injector life and maintains the engine's rated 27 kW output. Furthermore, the mechanical governor's response to load changes becomes sharper, reducing the droop that plagues elderly pumps. This repair choice avoids the hidden costs of premature nozzle replacement and customer complaints about sluggish performance under load.

Q1: Can I use the 2QT45 on a YD2108 with a different power rating?
A: No. The 2QT45 is specifically calibrated for the 27 kW version at 2200 rpm. Using it on a derated or boosted YD2108 will alter the fuel map, likely causing either excessive smoke or lack of power.

Q2: What gaskets or seals come with the pump?
A: The 2QT45 includes the mounting O-ring and the delivery valve gaskets. You will need to source the high-pressure line washers and the fuel filter gasket separately.

Q3: How do I distinguish a genuine KANGDA 2QT45 from a clone?
A: Genuine units bear a laser-etched KANGDA logo and the order number on the governor housing. The plunger barrel carries a batch code that matches the test certificate included in the box.

Q4: Does this pump support biodiesel blends up to B20?
A: Yes, the 2QT45's elastomers and plunger materials are compatible with B20 biodiesel. For higher blends, we recommend consulting KANGDA's technical bulletin.

Q5: What is the typical lead time for this order number?
A: Stock levels vary by region. Most distributors hold the 2QT45 as a fast-moving SKU, with delivery within 2–5 working days in major markets.

Q6: After installation, the engine runs rough – what should I check first?
A: Re-bleed the low-pressure circuit and verify the timing marks. Rough running often results from trapped air or a misaligned drive coupling rather than a pump defect.