KANGDA 2Q96 BH2Q80R8 – Direct-Fit Injection Pump For Changfa CF290T

Service shops and diesel parts distributors regularly encounter the KANGDA 2Q96 (pump model BH2Q80R8) when overhauling Changfa CF290T power units. This mechanically governed inline pump operates at 2200 RPM, pairs with a P-type nozzle, and delivers fuel for 17.31 kW rated output. Unlike generic aftermarket substitutes, this unit preserves the factory hydraulic calibration that CF290T owners expect during engine rebuilds or seasonal overhauls.

The BH2Q80R8 belongs to the BQ series family, characterised by compact plunger diameters and a fixed camstroke that suits small-bore industrial diesels. Factory records list the ordering reference as 2Q96, which ties directly to Changfa's internal parts catalogue for the CF290T. The pump uses a P-type delivery valve arrangement, not the conventional A-type, which alters the residual pressure in high-pressure lines during sudden throttle changes. This distinction matters when workshops replace only the pump head and keep old injectors-the opening pressure of P-nozzles sits higher, so line length and internal volume must remain stock to avoid timing drift. Engine speed caps at 2200 RPM, and the fuel map inside the pump is profiled for constant-load applications such as irrigation pumps, small gen-sets, and concrete mixers.

This pump does not interchange with BH2Q75R variants or earlier CF285T applications, despite visual similarities. The plunger stroke and spill port timing differ, so forcing a mismatch will skew injection advance and raise exhaust temperatures. For distributors, stocking the 2Q96 requires clear bin labelling that separates it from BH2Q85R units used on higher-displacement Changfa blocks. Every box includes the drive gear washer and two flange nuts, but workshops should order the high-pressure pipe set separately because reused lines often fret at the flare cone.

Mounting this pump onto the CF290T gear housing demands attention to backlash between the drive gear and the camshaft idler. Before sliding the BH2Q80R8 into place, rotate the crankshaft to cylinder No.1 compression TDC and confirm the timing mark on the pump drive gear aligns with the housing pointer. Hand-tighten the two flange nuts, then insert a 0.08 mm feeler gauge between the pump flange and gear housing-if it drags unevenly, the pump shaft is cocked. Torque the flange nuts in two stages: first to 20 Nm, then final to 40 Nm using a cross pattern. The three driven gear bolts receive 25 Nm with threadlocker medium grade. After securing, bleed the low-pressure circuit by loosening the banjo bolt at the inlet until fuel free of air bubbles streams out. Never crank the starter with loose lines; trapped air compresses and delays pressurisation, which may hydrolock the plunger barrel.

Most shop owners weigh exchange costs against in-house rebuilds for the 2Q96. The plunger barrel assembly typically wears past service limits after 6000 running hours, showing itself through slow RPM droop under load and white haze at cold start. Sending the pump to a diesel fuel-injection workshop for recalibration costs roughly 40‑60 % of a new unit, yet preserves the original housing fit-important because aftermarket housings sometimes have thicker mounting ears that interfere with the CF290T's tachometer drive. Common rail techniques do not apply here; this is a jerk-type pump where each plunger stroke fixes fuel volume purely by mechanical governor position. The absence of electronic trimming means repair shops must rely on calibrated test bench data, not laptop diagnostics, to validate delivery uniformity across both cylinders. A worn BH2Q80R8 will also starve the P-nozzle of adequate closing pressure, causing dribble and carbon packing around the injector tip-conditions that accelerate cylinder bore polishing.

Q1: Does the 2Q96 box come with the delivery valve holder and spring, or is that a separate line item?
A: The assembly includes the complete plunger barrel, delivery valve, holder, and governor linkage pre-set. The drive gear and high-pressure lines are not bundled.

Q2: Can we fit this BH2Q80R8 onto a CF290T that previously used a BH2Q80R7 pump?
A: No-the R8 variant carries a different spill timing curve. Retrofitting R7 would alter injection start by roughly 2° crank angle, raising peak cylinder pressure beyond safe limits.

Q3: What fuel viscosity range does the KANGDA pump accept for sustained operation?
A: It tolerates ISO 8218 distillates from 2.5 to 5.0 cSt at 40°C. Running thinner fuels like kerosene cuts lubricity and quickly scuffs the plunger sidewall.

Q4: How do we verify plunger wear without removing the pump from the engine?
A: Perform a static spill-timing check-if the dribble duration exceeds 18 seconds with the rack at full fuel, plunger clearance has opened up and overhaul is due.

Q5: Is the 17.31 kW rating measured at the flywheel or the PTO shaft?
A: That figure is flywheel output per Changfa's test code. Actual PTO power will be lower depending on the driven attachment's efficiency.