The 0445020150 CP3 common rail pump (often referred to as a high‑pressure oil pump in some technical manuals) is a precision‑engineered fuel injection component, fully compatible with Bosch CP3 architecture. This pump is specifically designed for six‑cylinder diesel engines used in heavy‑duty trucks, buses, construction machinery, agricultural tractors, marine engines, and industrial generators. Delivering stable rail pressure up to 1,800 bar, the 0445020150 ensures efficient combustion, low emissions, and reliable performance under extreme operating conditions.
Rsolid Engine Parts supplies the 0445020150 as a brand‑new, Bosch‑compatible unit – 100% calibration tested, and backed by a full 12‑month warranty at competitive pricing for fleets, workshops, and equipment dealers.
1. Structural Advantages of the Bosch CP3 0445020150 Pump
The 0445020150 belongs to the Bosch CP3 series – widely regarded as one of the most durable and reliable high‑pressure pump platforms in the diesel industry. Its design offers several key benefits for six‑cylinder diesel engines:
Three‑Plunger Radial Piston Design – Unlike two‑plunger CP4 pumps, the CP3 uses three radial plungers arranged around an eccentric cam ring. This delivers exceptionally smooth, high‑volume fuel flow with minimal pressure pulsation, reducing mechanical stress on the common rail, injectors, and high‑pressure lines – critical for the high torque and power demands of 6‑cylinder engines.
Integrated Vane‑Type Transfer Pump – A built‑in low‑pressure vane pump draws fuel directly from the tank and supplies the high‑pressure plungers, ensuring consistent inlet pressure even when the chassis lift pump is weak. This simplifies installation and removes a common failure point.
High‑Pressure Capability (1,800 bar) – Generates rail pressures up to 1,800 bar (26,100 psi), enabling superior fuel atomisation for complete combustion, lower soot formation, and improved fuel economy – essential for Euro 4, Euro 5, and Tier 4 emissions compliance.
Heavy‑Duty Drive Shaft & Bearings – Designed to withstand the high torsional loads and vibration of 6‑cylinder engines, ensuring long service life in both on‑highway and off‑highway applications.
High‑Pressure Fuel Lubrication – All moving internal parts (plungers, roller shoes, eccentric cam) are lubricated solely by diesel fuel, eliminating external oil lines and simplifying installation.
Integrated Digital Flow Control Valve (ZME) – An inlet metering solenoid valve precisely regulates the amount of fuel entering the high‑pressure section based on ECU demand. This provides accurate rail pressure control, improved throttle response, and lower fuel consumption.
Robust Cast Iron Housing – The pump body is manufactured from high‑strength cast iron with an anti‑corrosion coating, engineered to withstand vibration, thermal cycling, dust, moisture, and road salt encountered in heavy‑duty environments.
Direct Bosch CP3 Compatibility – Identical mounting flange (3‑bolt SAE A or B), drive gear interface, high‑pressure outlet ports, and electrical connector as the original Bosch 0445020150. True plug‑and‑play replacement with no modifications.
2. Compatible Engine & Vehicle/Equipment Models (≤5)
The 0445020150 CP3 pump is used in a wide range of 6‑cylinder common rail diesel engines from manufacturers such as MAN, DAF, Cummins, Deutz, Perkins, John Deere, IVECO, and Chinese brands (Weichai, Yuchai, Xichai, Sinotruk) . Typical applications include:
MAN D20 / D26 / D08 6‑cylinder engines – Found in MAN TGX, TGS, TGA trucks and buses (Euro 4/5).
DAF MX 11 / MX 13 engines – Used in DAF XF, CF, LF series trucks (certain model years).
Cummins ISB / ISC / ISL 6‑cylinder engines – Found in medium‑duty trucks, buses, and construction equipment.
Deutz TCD 2013 / 2014 L6 engines – Used in agricultural tractors (e.g., Fendt), wheel loaders, excavators, and gensets.
John Deere 6068 / 6090 common rail engines – Found in large agricultural tractors, combines, and industrial equipment.
Weichai WP10 / WP12 / WP13 engines – Widely used in Chinese trucks, buses, and construction machinery (verify pump number).
✅ Important Fitment Note – Before ordering, always verify the Bosch number on your original pump (stamped on the nameplate). The 0445020150 may also be listed under OEM numbers such as 51.12501‑7125, 51.12501‑7126, or engine‑specific part numbers. Contact us with your engine model and serial number for fitment confirmation.
3. Common Failures & Professional Installation/Replacement Advice
3.1 Typical Symptoms of a Failing 0445020150 Pump
Loss of power under heavy load – The engine struggles to maintain speed or torque, often accompanied by black exhaust smoke.
Extended cranking time before start – Rail pressure builds slowly, especially after the equipment sits overnight.
Engine surging or rough idle – Inconsistent fuel delivery at low RPM, causing hunting or misfiring.
DTC codes P0087, P0088, or P0191 – Rail pressure too low, too high, or sensor rationality fault.
Metal particles in the fuel filter – A clear sign of CP3 internal wear (plunger scuffing or roller bearing failure). Even small ferrous particles indicate imminent pump failure.
External fuel leakage – Visible diesel around the pump body, particularly at the drive shaft seal or around the ZME metering valve.
Diesel contamination in engine oil – A failed drive shaft seal allows fuel to enter the crankcase, leading to rising oil level and risk of engine damage.
3.2 Professional Installation & Replacement Recommendations
Perform a complete fuel system diagnosis – Use a compatible diagnostic tool (engine‑specific software, Bosch KTS, etc.) to read fault codes, monitor rail pressure, and measure injector return flow rates. Identify any injectors with excessive return flow.
Replace the fuel metering valve (ZME) – If the old pump has failed internally, replace the ZME solenoid valve (Bosch part number typically 0928400640 or equivalent) with a new one. A faulty ZME can cause repeat pump failure.
Replace all fuel filters – Install new primary (water separator) and secondary fuel filters before running the new pump. CP3 pumps are sensitive to contamination.
Flush the entire fuel system – Drain and clean the fuel tank. Blow out all supply and return lines with compressed air. Replace any rubber hoses that show degradation. This step is non‑negotiable – debris from a failed pump will destroy a new CP3 within minutes.
Inspect and flow‑test all injectors – High return flow from worn injectors will prevent correct rail pressure and cause repeat pump failure. Have all six injectors professionally cleaned or replaced as necessary.
Replace the engine oil and filter – If diesel has contaminated the oil (rising level or diesel smell), change the oil and filter BEFORE running the new pump.
Prime the low‑pressure circuit – Use a hand vacuum pump on the fuel return line to pull bubble‑free fuel through the pump and filters. CP3 pumps are self‑priming but dry cranking will score the plungers.
Fill the pump with clean diesel – Remove the high‑pressure outlet fitting and pour clean, lubricious diesel (or Bosch assembly lubricant) into the pump housing to prevent dry start scoring.
Torque all connections to specification – High‑pressure outlet (M14×1.5 cone seal): 40–45 Nm. Low‑pressure inlet (M16×1.5): 25 Nm. High‑pressure line union nuts: 35–40 Nm. Drive shaft nut: consult the engine workshop manual (typically 100–130 Nm). Use a calibrated torque wrench.
Reset fuel adaptations – After installation, use diagnostic software to clear learned fuel trim values and perform a “high‑pressure pump adaptation” or “fuel system learn” routine.
Perform a leak test – Idle the engine for 10 minutes, then inspect all high‑pressure and low‑pressure unions, the pump mounting area, and the drive shaft seal for any signs of fuel wetness.
Monitor rail pressure – Using live data, verify that actual rail pressure tracks within ±20 bar of specified value across all RPM ranges. Perform a road or load test.
💡 Pro Tip – CP3 pumps are generally robust, but water contamination is their enemy. Always drain the water separator daily. For 6‑cylinder engines operating in harsh environments, consider installing an additional 5‑micron fuel filter and using a high‑quality fuel additive with lubricity enhancer.
4. Why Choose Rsolid Engine Parts as Your Supplier
✅ Exact Bosch CP3 Compatibility – Direct replacement for 0445020150 in a wide range of 6‑cylinder diesel engines. No modifications required.
✅ 100% Calibration Tested – Each pump is run on a Bosch EPS 200 test bench to verify delivery volume, rail pressure stability (1,800 bar), ZME regulator response, and leak‑free operation. Test reports available.
✅ 12‑Month Warranty – Full coverage against manufacturing defects for all pumps supplied, even for heavy‑duty, high‑hour applications.
✅ Competitive Fleet & Workshop Pricing – Volume discounts for transport companies, agricultural dealers, construction equipment repair shops, and parts distributors.
✅ Fast Worldwide Shipping – Stock ready to ship to Europe, Asia, Africa, the Middle East, and the Americas.
✅ Expert Technical Support – Our diesel injection specialists provide pre‑purchase fitment verification, diagnostic assistance, and detailed installation guidance via WhatsApp or email.
Contact Rsolid Engine Parts Today
📞 WhatsApp: +8615975376778
📧 Email: amy@rinjector.com
