This is the Bosch 0445120305, a new common-rail fuel injector made by Bosch, not a rebuild. Cummins numbers it 5268436 and Komatsu numbers it 6746-11-3100. Catalogs list it for the Cummins QSL9 8.9L and for the Komatsu SAA6D114E-5, the engine in Dash 10 excavators such as the PC360LC-10. It is a Bosch CRIN3 injector and it comes with its seal ring. The engine takes six.

Do not order this one by engine name alone. Other 8.9L and 8.3L engines in the same family use a different Bosch injector, a CRIN1: Cummins 5263308 (Bosch 0445120236, Komatsu 6745-11-3102) or Cummins 5263310 (Bosch 0445120237). The Komatsu SAA6D114E-3 in the PC300-8 takes the 0445120236, not this one. Read the Cummins, Komatsu or Bosch number on the injector you are taking out. Hard starting, a rough idle, a miss under load, smoke, low power or a rail pressure fault are the usual reasons these get replaced. Dirt and water in the fuel are what usually kill a common-rail injector, so rule out the fuel filters, the supply side and the connector tubes first, and clean up the fuel before new injectors go in.

Specifications

Fits / Applications

• Cummins QSL9 8.9L engines that carry Cummins injector 5268436
• Komatsu SAA6D114E-5 engines that carry Komatsu injector 6746-11-3100, the engine in Dash 10 excavators such as the PC360LC-10
• Not for engines that carry Cummins 5263308 or 5263310, and not for the Komatsu SAA6D114E-3 (PC300-8): those take Bosch 0445120236 or 0445120237
• Six injectors per engine

Use the new seal ring that comes with the injector. Pull the high-pressure connector (feed) tubes, inspect each one and replace any that is worn or marked at the tip. Change the fuel filters and clear out dirty or watered fuel before the first start, and follow the engine maker’s service information for any setup step after injector replacement.

Part Numbers & Cross Reference

Cummins 5268436  ·  Cummins (suffix versions) 5268436NX, 5268436PX, 5268436RX  ·  Komatsu 6746-11-3100

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 0445120305 fit my Komatsu PC360LC-10?

Catalogs list it for the Komatsu SAA6D114E-5, the engine in the PC360LC-10, as Komatsu injector 6746-11-3100. Check that number against your old injector, or call 530-668-0818 with the machine model and serial number.

Is it the same injector as Bosch 0445120236?

No. The 0445120236 is a Bosch CRIN1 injector, Cummins 5263308 and Komatsu 6745-11-3102, for other QSL and ISL engines and the Komatsu SAA6D114E-3. The 0445120305 is a CRIN3 injector, Cummins 5268436 and Komatsu 6746-11-3100. Go by the number on your old injector.

What numbers does 0445120305 replace?

Cummins 5268436 and Komatsu 6746-11-3100.

Is 0445120305 new or remanufactured, and is there a core?

It is a new Bosch injector, not a rebuild, and it is sold outright with no core to send back. It comes with its seal ring.

Related Parts

• Cummins ISL & QSL 8.9L, Case IH, New Holland & Komatsu Fuel Injector | Bosch 0445120236 New (Cummins 5263308)
• Cummins QSL & ISL 8.9L, Case IH & New Holland Fuel Injector | Alliant Power AP55555 Remanufactured (5263310)
• Cummins ISL & QSL, Case IH, New Holland & Komatsu Injector | Alliant Power AP55522 Remanufactured (5263308)
• Cummins ISC & ISL 8.9L HE300VG Turbo Actuator Kit | Holset 6382091HX Remanufactured
• Common Rail Diesel Injector Testing & Rebuild Service

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.

Not sure the injectors are the problem? We test and diagnose in-house before you buy. See our common rail injector testing and rebuild service.