This is a new Bosch CP3 high-pressure common-rail pump, Bosch 0445020122. It replaces earlier Bosch 0445020043 and matches Cummins 5256607, 5256608, 4988593, 3975701 and 4941066. It fits Cummins QSB4.5 and QSB6.7 Tier 3 industrial engines. Komatsu uses the same pump (Komatsu 6754-71-1012) on its SAA4D107E-1 and SAA6D107E-1 engines, for example in PC200-8 and PC220-8 excavators and WA200-6 and WA250-6 wheel loaders. It is a new pump, not a rebuild. The Bosch remanufactured version of the same pump is 0986437310.

Common reasons to replace a CP3 are low rail pressure codes, hard starting, loss of power under load, or metal in the fuel filters. Water or dirt in the fuel is the usual root cause, so fix that before the new pump goes on. Ram pickups take other Bosch CP3 numbers, and so do the ISB 5.9 and ISB 6.7 midrange truck and bus engines we list (for example 0986437307 and 0986437333), so match the number on your old pump before you order. This pump is listed for Tier 3 engines. For Tier 4 QSB4.5 and QSB6.7 engines see our listing for the Bosch 0445020609 pump.

Specifications

Fits / Applications

• Cummins QSB4.5 and QSB6.7, Tier 3 industrial engines
• Komatsu SAA4D107E-1 and SAA6D107E-1 engines
• Komatsu PC200-8 and PC220-8 excavators
• Komatsu WA200-6 and WA250-6 wheel loaders
• Listed for Tier 3 engines. For Tier 4 QSB4.5 and QSB6.7 engines see our Bosch 0445020609 listing

Replace the fuel filters and check fuel supply to the pump before fitting. If the old pump left metal in the filters, clean the tank, lines and rail and check the injectors, or the debris will damage the new pump. Move the drive gear over from the old pump if the replacement comes without one, torque the gear nut to the engine maker’s spec, and prime the fuel system before cranking.

Part Numbers & Cross Reference

Bosch remanufactured version 0986437310  ·  Bosch new (earlier) 0445020043  ·  Cummins 5256607  ·  Cummins reman 5256607RX  ·  Cummins 5256608  ·  Cummins 4988593  ·  Cummins 3975701  ·  Cummins 4941066  ·  Komatsu 6754-71-1012  ·  Komatsu 6754-71-1010

Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.

Frequently Asked Questions

Will Bosch 0445020122 fit a Komatsu PC200-8?

Catalogs list it for the PC200-8. Komatsu uses this pump, Komatsu 6754-71-1012, on its SAA4D107E-1 and SAA6D107E-1 engines, including PC200-8 and PC220-8 excavators and WA200-6 and WA250-6 wheel loaders. Match the Komatsu or Bosch number on your old pump, or send us the machine model and serial number and we will confirm it.

What numbers does Bosch 0445020122 replace?

Earlier Bosch 0445020043, Cummins 5256607, 5256608, 4988593, 3975701 and 4941066, and Komatsu 6754-71-1012 and 6754-71-1010. The Bosch remanufactured version of the same pump is 0986437310.

Is this pump new or remanufactured, and is there a core?

It is a new Bosch pump, not a rebuild, so there is no core to send back. The Bosch remanufactured version, 0986437310, is listed separately and carries a refundable core.

Does it fit a Tier 4 QSB6.7 or a Ram pickup?

No. This pump is listed for Tier 3 QSB engines, and Ram pickups use their own CP3 numbers. For a Tier 4 QSB4.5 or QSB6.7 see our Bosch 0445020609 listing, or call 530-668-0818 with the engine serial number (ESN) and CPL and we will match the pump.

Related Parts

• Cummins QSB 4.5 & QSB 6.7 Tier 3 CP3 Injection Pump | Bosch 0986437310 Remanufactured
• Cummins QSB4.5 & QSB6.7 Tier 4 CP4.2 High-Pressure Fuel Pump | Bosch 0445020609 New
• 2007-2010 Cummins ISB 6.7 Midrange (Rear Gear) CP3 Injection Pump | Bosch 0986437333 Remanufactured
• Cummins QSB4.5, QSB5.9 & QSB6.7 Common-Rail Fuel Injector | Alliant Power AP55597 Remanufactured

Why Buy From Valley Fuel Injection

We are a diesel fuel-injection and turbocharger shop in Woodland, CA, rebuilding pumps, injectors and turbos on our own benches since 1993, not a drop-ship storefront. When you call, you talk to the people who test these units. We verify fitment against your engine serial, VIN or build date before anything ships, so the right part arrives the first time.