0445020517 Injection Fuel Pump – Bosch Compatible for Cummins ISF3.8 Excavator Engine | Rsolid Engine Parts
Cummins ISF3.8 engines are widely used in excavators, wheel loaders, and light‑duty trucks, where reliability under extreme conditions is paramount. The 0445020517 high‑pressure common rail fuel pump – fully compatible with Bosch CP3 architecture – is a direct OE replacement for Cummins ISF3.8 diesel engines found in excavators and other heavy equipment. This pump restores consistent rail pressure, improves fuel efficiency, and ensures reliable cold starts even after thousands of operating hours. Rsolid engine parts supplies this pump with 100% calibration testing and a 12‑month warranty.
1. Structural Advantages of the 0445020517 Injection Pump
The 0445020517 is a Bosch CP3‑type pump, purpose‑built for mid‑range diesel engines like the Cummins ISF3.8. Its design focuses on durability and stable high‑pressure delivery:
Three‑Plunger Radial Piston Design – Three plungers arranged radially deliver exceptionally smooth, high‑volume fuel flow with minimal pressure ripple, reducing stress on the common rail and injectors – critical for excavators that operate at varying loads.
Integrated Vane‑Type Transfer Pump – Built‑in low‑pressure vane pump draws fuel from the tank and supplies the high‑pressure plungers, ensuring consistent inlet pressure even when the lift pump is weak or fuel filters are partially restricted.
Heavy‑Duty Drive Shaft with Reinforced Bearings – Designed to withstand the high torque peaks and torsional vibrations of the ISF3.8 engine, especially during sudden load changes in digging applications.
Cast Iron Housing with Anti‑Corrosion Coating – Resists vibration, thermal cycling, and exposure to water, dust, and mud common on construction sites.
Direct Bosch Compatibility – Identical mounting flange, drive gear interface (gear‑driven from the engine timing train), high‑pressure outlet ports, and electrical connector as the original Bosch 0445020517. No modifications required.
2. Compatible Cummins ISF3.8 Equipment Models (≤5)
The 0445020517 pump is specifically calibrated for the Cummins ISF3.8 common rail diesel engine (3.8L, 4‑cylinder, Tier 3 / Tier 4i). Typical excavator and equipment applications include:
Caterpillar (built with Cummins engine) 307E / 308E excavator (ISF3.8 powered)
Sany SY75C / SY85C mini excavator (Cummins ISF3.8)
XCMG XE75DA / XE85DA excavator (ISF3.8 common rail)
Liugong 9075E / 9085E excavator (Cummins ISF3.8)
Lovol / Foton heavy equipment with ISF3.8 engine (various models)
✅ Always confirm your engine serial number (Cummins ISF3.8) and the original Bosch pump number. The 0445020517 is usually stamped on the pump nameplate. Some ISF3.8 variants use different pumps – verify before ordering.
3. Common Failures & Installation/Replacement Advice
Typical Symptoms of a Failing 0445020517 Pump:
Loss of hydraulic and engine power under load – Excavator struggles to dig or lift, often accompanied by black smoke.
Hard starting or long cranking time – Especially after overnight parking.
Engine surging or unstable idle – Rail pressure fluctuates due to internal wear.
DTCs P0087, P0088, P0191 – Rail pressure too low, too high, or sensor rationality.
Metal particles in the fuel filter – A clear sign of CP3 internal wear (plungers or cam).
External diesel leak – From the drive shaft seal or fuel pressure regulator base.
Professional Installation & Replacement Recommendations:
Replace all fuel filters – ISF3.8 engines typically have a primary (water separator) and secondary filter. Install new OEM‑quality filters before starting the new pump.
Flush the entire fuel system – Remove and clean the fuel tank, blow out supply and return lines, and replace any soft hoses. Excavators often accumulate dirt and water – a full flush is mandatory.
Inspect and clean injectors – Have the injectors professionally flow‑tested. High return flow indicates stuck injectors. Replace or rebuild them to prevent repeat pump failure.
Prime the low‑pressure circuit – Use a hand vacuum pump on the fuel return line to pull diesel through the pump and filters until bubble‑free fuel appears. Never dry‑crank the pump.
Fill the pump with clean diesel – Remove the high‑pressure outlet fitting and pour clean, lubricious diesel into the pump housing to prevent dry start scoring.
Torque connections to spec – High‑pressure outlet M14×1.5 cone seal: 40–45 Nm. Low‑pressure inlet M16×1.5: 25 Nm. Drive gear retaining nut: consult Cummins workshop manual (typically 100–120 Nm).
Reset fuel adaptations – Use Cummins INSITE or a compatible diagnostic tool to clear learned fuel trim values and perform a “high‑pressure pump learn” routine.
Check the fuel pressure regulator (ZME) – If the old pump failed, replace the pressure regulator on the pump or rail as a precaution.
Run a leak test – Idle the engine for 10 minutes, then inspect all unions, the pump mounting flange, and the timing cover area for wetness.
💡 Pro Tip: Excavator fuel systems are exposed to more contamination than on‑highway trucks. Install an additional 10‑micron secondary fuel filter and drain the water separator daily. Consider using a fuel additive with lubricity and biocide.
4. Why Choose Rsolid Engine Parts?
Exact Bosch CP3 Compatibility – Direct replacement for Cummins ISF3.8 in excavators and other heavy equipment.
100% Calibration Tested – Each pump is run on a Bosch EPS 200 test bench to verify delivery volume, rail pressure control, and regulator response. Test report available.
12‑Month Warranty – Full coverage against manufacturing defects, even for off‑highway use.
Competitive Equipment Dealer Pricing – Volume discounts for construction equipment rental companies, workshops, and parts distributors.
Fast Worldwide Shipping – Stock ready for export to Asia, Africa, South America, the Middle East, and Europe.
Direct Technical Support – Our diesel specialists provide fitment checks, diagnostic advice, and installation guidance via WhatsApp or email.
Contact Rsolid Engine Parts Today
📞 WhatsApp: +8615975376778
📧 Email: amy@rinjector.com
