CP4 0445020508 Fuel Injection Pump – Bosch Compatible for Case, New Holland (CNH) & Iveco 3.4L Diesel Engines | Rsolid Engine Parts

Agricultural and industrial equipment demand extreme durability from their fuel systems. The CP4 0445020508 high-pressure fuel injection pump – fully compatible with Bosch CP4 architecture – delivers the precise rail pressure needed for Case, New Holland, CNH, and Iveco 3.4L diesel engines. Whether you are servicing a tractor, a skid steer, or a light commercial vehicle, this pump ensures reliable starting, consistent power, and lower emissions. Rsolid engine parts supplies this pump with 100% calibration testing and a 12-month warranty.

1. Structural Advantages of the CP4 0445020508 Injection Pump

The CP4 pump is known for its compact, high-efficiency design. The 0445020508 variant matches Bosch OEM specifications with the following engineering strengths:

• Two-Plunger Radial Design – Unlike older inline pumps, the CP4 uses two opposing plungers driven by a single eccentric cam. This reduces torsional load on the drive gear and provides smoother fuel delivery to the common rail.

• High-Pressure Fuel Lubrication – All moving parts are cooled and lubricated by the diesel fuel itself, eliminating the need for external oil feed and simplifying installation.

• Integrated Digital Flow Control Valve (ZME) – Electronically regulated by the ECU to meter inlet fuel quantity precisely, improving fuel economy and reducing smoke during cold starts.

• Reinforced Drive Shaft with Truncated Keyway – Designed to handle the high torque peaks of 3.4L turbo diesel engines used in off‑highway applications.

• Direct Bosch Compatibility – Identical mounting pattern, high‑pressure outlet ports, and electrical connector as the original Bosch 0445020508. No software or hardware modifications required.

2. Compatible Equipment & Engine Models (≤5)

This pump is specifically calibrated for the FPT (Iveco) 3.4L engine family (also known as NEF or TECTOR series). Common applications include:

• Case IH Farmall A / C series tractors (with FPT N34 diesel)

• New Holland T4.75 / T4.85 / T4.95 (3.4L turbo common rail)

• CNH Industrial – Iveco Daily 3.4L (2009–2015, Euro 4/5)

• Case CX31C / CX36C mini excavators (with FPT 3.4L)

• New Holland E26B / E27B compact excavators

✅ Always confirm your engine code (FPT N34, F4AE34, etc.) and original pump number. The Bosch reference 0445020508 is usually stamped on the pump nameplate.

3. Common Failures & Installation/Replacement Advice

Typical Symptoms of a Failing CP4 0445020508 Pump:

• Loss of rail pressure under load – Tractor loses power when climbing or during PTO operation.

• Hard starting after sitting overnight – Air ingress into the suction side due to worn shaft seal.

• Metal debris found in fuel filter – The most critical sign. CP4 pumps can suffer from plunger wear that produces fine ferrous particles.

• Intermittent "Check Engine" with P0087, P1093 – Common rail pressure too low.

• Fuel dilution of engine oil – Rare but occurs if the drive shaft seal fails completely.

Professional Installation & Replacement Recommendations:

• Perform a complete fuel system flush – This is non‑negotiable. Remove, inspect, and clean the fuel tank, all supply and return lines, and the rail. A failed CP4 often sends metal to injectors.

• Replace all fuel filters – Install a new OEM-quality primary and secondary filter. Consider adding a magnetic sump plug to capture ferrous debris.

• Test and clean injectors – Have the injectors flow-tested before installing the new pump. High return flow indicates stuck injectors that will immediately damage a new pump.

• Prime the pump before installation – Fill the inlet port with clean, lubricious diesel or light assembly oil. Never dry-crank the pump.

• Use a vacuum priming tool – Bleed all air from the low‑pressure circuit (from tank to pump) before starting the engine. Air is the enemy of CP4 plungers.

• Torque high-pressure connections precisely – The outlet fitting to the rail requires 40–45 Nm for the M14×1.5 cone seal. Over‑torquing cracks the rail.

• Reset fuel trim adaptations – Using diagnostic software (CNH EST, Iveco E.A.SY, or Bosch KTS), clear learned fuel volume values and perform a pump learning routine.

• Inspect the drive gear and timing cover – Ensure the pump drive gear has no worn teeth and the timing cover is free of debris.

⚠️ Critical Warning: CP4 pumps are known to be sensitive to water and aeration. Always use a high-quality water separator and change it regularly. Even small amounts of water can scuff the plungers.

4. Why Choose Rsolid Engine Parts?

• Exact Bosch CP4 Compatibility – Direct fit for CNH, Case, New Holland, and Iveco 3.4L applications.

• Tested on Advanced Calibration Bench – Each pump is run to verify delivery volume, rail pressure stability, and regulator response. Test report available.

• 12‑Month Warranty – Full coverage against manufacturing defects. No hidden clauses.

• Competitive Fleet & Agricultural Dealer Pricing – Volume discounts for workshops and parts distributors.

• Fast Global Shipping – We stock CP4 pumps for FPT, Cummins, and Bosch common rail systems.

• Expert Support – Our diesel technicians provide pre‑purchase fitment checks and post‑sale guidance via WhatsApp or email.

Contact Rsolid Engine Parts Today
📞 WhatsApp: +8615975376778
📧 Email: amy@rinjector.com