0445020126 Common Rail Fuel Pump – Bosch Compatible for Navistar International Trucks | Rsolid Engine Parts

Navistar International trucks are known for their rugged performance in long‑haul, vocational, and severe‑duty applications. The 0445020126 common rail fuel pump – fully compatible with Bosch CP3 (or CP4.2) architecture – is a direct OE replacement for a range of International trucks equipped with MaxxForce diesel engines. This pump delivers the high fuel pressure needed for efficient combustion, reduced emissions, and reliable operation under extreme loads.

Rsolid Engine Parts supplies the 0445020126 as a brand‑new, Bosch‑compatible pump – 100% calibration tested, and backed by a full 12‑month warranty at competitive pricing.

1. Structural Advantages of the Bosch 0445020126 Pump

The 0445020126 is a high‑pressure common rail pump, typically based on the Bosch CP3 (three‑plunger) or CP4.2 platform. It is engineered specifically for the demands of heavy‑duty Navistar International engines:

• Three‑Plunger Radial Design (CP3 type) – Three plungers arranged radially deliver exceptionally smooth, high‑volume fuel flow with minimal pressure ripple, reducing stress on the common rail and injectors. This design is inherently more durable than two‑plunger pumps in high‑mileage applications.

• Integrated Vane‑Type Transfer Pump – A built‑in low‑pressure vane pump draws fuel from the tank and supplies the high‑pressure section, ensuring consistent feed pressure even when the chassis lift pump is weak – common in ageing Navistar trucks.

• High‑Pressure Capability (Up to 2,000 bar) – The pump is capable of generating rail pressures up to 2,000 bar (29,000 psi), enabling superior fuel atomisation for complete combustion, lower soot output, and improved fuel economy.

• Heavy‑Duty Drive Shaft & Bearings – Designed to withstand the high torsional loads and vibration of Navistar’s 6‑cylinder and 8‑cylinder diesel engines, ensuring long service life in on‑highway and off‑highway use.

• High‑Pressure Fuel Lubrication – All moving internal parts (plungers, roller shoes, eccentric cam) are lubricated by diesel fuel, simplifying installation and eliminating external oil lines.

• Integrated Flow Control Valve (ZME) – An inlet metering solenoid valve precisely regulates fuel entry based on ECU demand, providing accurate rail pressure control and improved throttle response.

• Robust Cast Iron / Aluminium Housing – The pump body is coated for corrosion resistance, capable of withstanding road salt, moisture, and dust encountered in long‑haul and vocational service.

• Direct Bosch Compatibility – Identical mounting flange (SAE A or B), drive gear interface, high‑pressure outlet ports, and electrical connector as the original Bosch 0445020126. Plug‑and‑play replacement with no modifications.

2. Compatible Navistar International Truck Models (≤5)

The 0445020126 pump is specifically calibrated for Navistar MaxxForce diesel engines, particularly the MaxxForce 10 (9.8L), MaxxForce 11 (10.5L), and MaxxForce 13 (12.4L) series. Compatible vehicles include:

• International ProStar+ (2008–2015) – with MaxxForce 11 or MaxxForce 13 engine

• International LoneStar (2008–2015) – with MaxxForce 11 or 13

• International WorkStar (2008–2015) – with MaxxForce 10 or 11

• International DuraStar (2008–2015) – with MaxxForce 7 or MaxxForce 9 (verify pump number)

• International 9900i (2008–2015) – with MaxxForce 13 engine

✅ Important Fitment Note – Always verify your original pump Bosch number and your engine serial number. The 0445020126 is also listed under International OEM numbers such as 1843547C93, 1858057C92, or 1858057C93. Many MaxxForce 11 and 13 engines use a CP3 pump – this is the direct replacement.

3. Common Failures & Installation/Replacement Advice

3.1 Typical Symptoms of a Failing 0445020126 Pump

• Loss of power under heavy load – The truck struggles to climb grades or accelerate when loaded. Black smoke from exhaust is common.

• Extended cranking time before start – Rail pressure builds slowly, especially after the truck sits overnight.

• Engine surging / rough idle – Inconsistent fuel delivery at low RPM, causing hunting or misfiring.

• DTC codes P0087, P0088, P0191 – Fuel rail pressure too low, too high, or sensor rationality.

• Metal particles in the fuel filter – A clear sign of CP3 internal wear (plunger scuffing or cam/roller failure). Even small ferrous particles indicate imminent pump failure.

• External fuel leakage – Diesel visible around the pump body, especially at the drive shaft seal or the metering valve.

• Fuel in the engine oil – A failed drive shaft seal allows diesel to contaminate the crankcase, leading to rising oil level and risk of engine damage.

3.2 Professional Installation & Replacement Recommendations

• Perform a full system diagnosis – Use a diagnostic tool (NexIQ, JPRO, or Navistar ServiceMaxx) to read codes, check rail pressure, and measure injector return flow rates.

• Replace all fuel filters – Install new International OEM or high‑quality secondary and primary (water separator) filters before running the new pump.

• Flush the entire fuel system – Drain and clean the fuel tank. Blow out supply and return lines with compressed air. Replace any degraded rubber hoses. Debris from a failed pump will quickly destroy a new CP3 pump.

• Inspect and flow‑test all injectors – High return flow from worn injectors will prevent proper rail pressure and cause repeat pump failure. Have injectors professionally cleaned or replaced.

• Replace engine oil and filter – If diesel has contaminated the oil, change it before starting the new pump.

• Prime the low‑pressure circuit – Use a hand vacuum pump on the 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 and pour clean, lubricious diesel (or Bosch assembly lubricant) into the pump housing.

• Torque connections to spec – High‑pressure outlet (M14×1.5 cone seal): 40–45 Nm. Low‑pressure inlet (M16×1.5): 25 Nm. Drive shaft nut: consult Navistar manual (typically 110–130 Nm). Use a calibrated torque wrench.

• Reset fuel adaptations – After installation, use diagnostic software to clear learned trim values and perform a “high‑pressure pump learn” routine.

• Leak test and monitor – Idle for 10 minutes, inspect all unions. Using live data, verify actual rail pressure tracks within ±20 bar of specified across all RPMs.

💡 Pro Tip – Navistar MaxxForce engines are sensitive to aeration and water. Drain the water separator daily. For fleets, consider installing a secondary 5‑micron fuel filter kit to extend pump and injector life.

4. Why Choose Rsolid Engine Parts as Your Supplier

• ✅ Exact Bosch CP3 Compatibility – Direct replacement for 0445020126 in Navistar International MaxxForce 10, 11, 13 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, ZME response, and leak‑free operation. Test reports available.

• ✅ 12‑Month Warranty – Full coverage against manufacturing defects, even for heavy‑duty, high‑mileage use.

• ✅ Competitive Fleet & Dealer Pricing – Volume discounts for truck repair shops, fleet operators, and parts distributors.

• ✅ Fast Worldwide Shipping – Stock ready to ship to North America, South America, Europe, Africa, Asia, and the Middle East.

• ✅ Expert Technical Support – Our diesel specialists provide pre‑purchase fitment verification, diagnostic assistance, and installation guidance via WhatsApp or email.

Contact Rsolid Engine Parts Today

📞 WhatsApp: +8615975376778
📧 Email: amy@rinjector.com