Bosch CP2.2 High-Pressure Common Rail Fuel Pump

The Bosch CP2.2 is a rugged radial-piston high-pressure pump engineered for common rail diesel systems in medium- and heavy-duty commercial vehicles. Delivering rail pressures up to 160 MPa independent of engine speed, it ensures precise fuel metering for optimal combustion and lower emissions. This unit integrates a robust drive section and hydraulic pumping elements that convert engine torque into pressurized diesel. Its internal pressure compensation chamber adjusts plunger stroke in real time, maintaining stable injection timing for Euro IV, Tier III, and above standards. For diesel fuel system workshops and parts distributors, the CP2.2 offers reliable, serviceable performance that reduces warranty claims and improves cold-start consistency with reduced NVH.

The Bosch CP2.2 is manufactured to OEM tolerances for seamless ECU integration. The pumping element features a plunger diameter from 7.5 mm to 8.0 mm depending on variant, with geometric displacement between 2,032 mm³/r and 3,619 mm³/r supporting engine outputs of 150 kW to 200 kW. The integrated feed pump delivers 400 L/h, with max rotational speed rated at 1,400–1,600 rpm. High-pressure plunger assemblies (e.g., F019D03313, F019D03317) withstand up to 1800–2000 bar, using alloy steel with DLC or chrome plating for wear resistance. Hydraulic mating surfaces achieve a 2-4 micron fit and surface roughness ≤ 0.05 μm, ensuring minimal leakage and consistent volumetric efficiency over the service life.

This pump variant is not a universal component; it is specifically designed for a narrow band of engine families to ensure factory-grade performance. The Bosch CP2.2 is a direct fit for Weichai WP6 and WP10 engine platforms widely used in Chinese heavy trucks and construction equipment . Additionally, the plunger assembly is a critical service part for engines manufactured by Cummins (including the ISB6.7, QSB6.7, and ISDe series) and European powertrains like the Mercedes-Benz OM904LA and OM906LA, as well as MAN D0834 and D0836 units . The pump also shares compatibility with certain 2.2L HDi and TDCi passenger vehicle applications, as indicated by cross-reference numbers such as 0445010139 for Citroën C-Crosser and Ford Galaxy models . When ordering, it is crucial to cross-reference the specific part number-such as 0445020116, 0445020245, or 2469403622-against the donor vehicle's engine serial number to avoid hydraulic mismatches .

Installing a high-pressure pump demands strict cleanliness and torque precision. The Bosch CP2.2 operates with 2-4 micron clearances; contamination is the leading cause of plunger seizure and SCV valve failure. Flush supply lines and install a new fuel filter before fitting. The fuel metering unit (SCV Valve)-often 0928400617 or 0928400741-should be inspected or replaced concurrently, as it regulates intake based on ECU demands. Align the pump gear with engine timing marks; incorrect phasing causes rail pressure deviations. Prime the pump with clean diesel before cranking-running dry, even briefly, scores internal elements and triggers fault codes like P0087. Lubricate all seals with diesel during assembly to prevent twisting.

Q1: How do I confirm CP2.2 fitment for my engine?
A: Match the engine serial number and the Bosch part number. Variants differ by plunger diameter (7.5mm vs 8.0mm). Cross-check your old OE number like 0445020116 or 2469403622 against our listing.

Q2: What symptoms indicate CP2.2 pump failure?
A: Prolonged cranking, power loss under load, or metal debris in the return line. Fault codes P0087 or P0191 typically point to plunger wear or a stuck SCV valve.

Q3: Should I replace the SCV valve with the pump?
A: Yes. The SCV Valve (0928400617) regulates fuel volume. A sticking valve can contaminate the new pump-replace it as preventive maintenance.

Q4: Why choose CP2.2 over other Bosch pumps?
A: Its radial-piston design with a pressure compensation chamber maintains constant rail pressure across RPM ranges, critical for variable-load agricultural and construction applications.

Q5: Is a remanufactured CP2.2 pump reliable?
A: Yes, when reconditioned with Bosch original parts and tested on an EPS619 bench, it meets OEM tolerances at a lower cost than dealership new units.

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