KANGDA 2Q45 BH2Q85R8 – Direct-Fit Pump For Lijia 2108 Diesel

The KANGDA 2Q45 (injection pump model BH2Q85R8) delivers a factory-calibrated fuel charge for the Lijia 2108 diesel engine at 2600 RPM. Designed as a mechanical inline unit, this component replaces worn original equipment with identical plunger stroke, delivery valve timing, and governor response. For workshops handling agricultural tractors, forklifts, or compact gensets, this pump restores cold-start reliability and throttle linearity without requiring ECU reprogramming or pump-bench remapping.

This BH2Q85R8 unit operates with a camshaft lift and plunger diameter specifically chosen for the 2108's 108 mm bore. The 2Q45 order code locks in the correct delivery-valve holder height and spring preload, ensuring that fuel cut-off occurs precisely at the engine's rated ceiling of 2600 RPM. KANGDA machines the plunger-and-barrel pairing to a clearance that maintains injection pressure across the entire load spectrum-critical for avoiding timing drift as the pump warms up. The housing uses a four-mounting-hole flange identical to the original, and the drive shaft carries a keyway that matches the Lijia drive gear. Replacement requires no shim stacking beyond the factory thickness, saving bench time for service bays.

You will find this 2Q45 pump specified for the Lijia 2108 in 3-tonne counterbalance forklifts, small row-crop tractors (25–35 HP), and stationary generator sets used on farms and construction sites. The 2600 RPM governor setting suits PTO-driven implements like rotary tillers and post-hole diggers, where steady torque under variable load is non-negotiable. For parts distributors, this BH2Q85R8 also cross-references with certain older Changchai and Xinchai engine families, making it a valuable inventory addition for rural service networks. Unlike electronic pumps, this mechanical unit thrives in dusty, high-vibration environments where sensor failure would sideline a common-rail system. Workshop owners appreciate that the same pump fits both direct-injection and pre-combustion chamber variants of the 2108 block, simplifying stock choices.

Before bolting the BH2Q85R8 onto the gear housing, rotate the engine to number-one cylinder firing TDC and verify the timing mark on the pump drive gear aligns with the housing pointer. Use a new gasket and O-ring-reusing old seals invites air ingress and hard starting. The three high-pressure outlet nuts require torque to 25–30 Nm; overtightening distorts the delivery-valve seat and alters the residual pressure in the line. After installation, crack the injector lines at the nozzles and crank the starter until fuel exits bubble-free. Then tighten and run the engine at idle for two minutes while checking for external seepage around the throttle shaft. For shops without a calibration stand, this pump arrives preset from KANGDA, so you only need to confirm static timing with a dial gauge-no plunger-lift adjustments are necessary unless the engine block has been skimmed.

Fitting a fresh KANGDA 2Q45 addresses three common 2108 complaints: sluggish acceleration under load, excessive black smoke during startup, and uneven idling that shakes the cab. The new plunger restores volumetric efficiency, so each injection event delivers the intended fuel mass, cutting smoke and improving fuel economy by 6–8% compared to a worn pump. For the service writer, this pump reduces diagnostic rabbit holes-it eliminates timing-chain stretch and worn roller tappets as variables. The hardened camshaft and chrome-plated plunger extend overhaul intervals, giving fleet owners a clear ROI within one season of heavy use. Stocking this KANGDA model means you can offer a same-day fix for downed equipment, avoiding the 5–7 day wait for pump rebuilding services.

Q1: Does this BH2Q85R8 come with the drive gear or just the bare pump?
A: The unit ships as a complete pump with the drive flange and key installed, but the timing gear itself is reused from the old engine. We supply the mounting gasket and outlet washers in the box.

Q2: Can I fit this 2Q45 to a 2108 engine that previously ran a different KANGDA pump code?
A: Only if the original order code was also 2Q45. Other KANGDA variants for the 2108 may have different governor spring rates or delivery-valve opening pressures, which would alter full-load fueling.

Q3: What fuel viscosity range is assumed for the calibration of this pump?
A: The bench setting conforms to ISO 8217 distillate grades, covering diesel fuel with a viscosity of 2.0–4.5 cSt at 40°C. For winterized or biodiesel blends up to B20, expect normal operation within 2% of nominal delivery.

Q4: How do I distinguish genuine KANGDA casting from a counterfeit copy?
A: Authentic units carry a laser-etched 2Q45 suffix on the data plate and a batch number on the governor cover. The plunger guide bore shows a cross-hatch finish, not a polished surface.

Q5: Is a warranty claim affected by using non-genuine injector nozzles with this pump?
A: Yes-the pump and nozzles form a matched hydraulic circuit. Fitting nozzles with different opening pressure or hole size shifts the timing curve and may void coverage. We recommend matching KANGDA injectors for full guarantee.