This is the Bosch 0432191390, a new fuel injector for the Cummins six-cylinder engine in Case IH STX275 and STX325 tractors and FLX3010, FLX3510, FLX4010 and FLX4510 floaters. Catalogs also list it for the New Holland TJ325 tractor and the Massey Ferguson 9790 combine. It is a complete nozzle and holder assembly, not a rebuild. It replaces Cummins 3948636 and 3948635, Case J948636 and CNH 87422170. Catalogs name the Cummins ISC 8.3L and QSL engines, and show the STX325 with a 9.0L. The engine takes six.

Bosch sets the opening pressure at 300 to 314 bar. These machines were built with more than one injector: Case IH parts books for the STX275, STX325 and FLX floaters also list Case J948529 (Bosch 0432191426), and one catalog splits the STX325 by engine serial number. Go by the number on the old injector, not by the machine model alone. This is also not the common-rail injector used on later ISC and QSC 8.3L engines: those are electronic injectors with a plug on top. The mechanical 6CT 8.3L takes a different part again, Bosch 0432191812, which opens at 205 to 219 bar.

Specifications

Fits / Applications

• Case IH STX275 and STX325 tractors with the Cummins engine, by engine serial number
• Case IH FLX3010, FLX3510, FLX4010 and FLX4510 floaters
• New Holland TJ325 tractor
• Massey Ferguson 9790 combine with the Cummins engine
• Cummins ISC 8.3L and QSL engines that call for 3948636 or 3948635
• CNH numbers 87422170 and 87422171
• Six injectors per engine

Fit new sealing washers, keep everything clean, and change the fuel filters when you fit a set. Bleed the system before you start the engine.

Part Numbers & Cross Reference

Bosch 0432191390  ·  Cummins 3948636  ·  Cummins 3948635  ·  Case J948636  ·  CNH / Case IH / New Holland 87422170  ·  CNH (also listed) 87422171  ·  CNH remanufactured exchange number 87422170R

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

What numbers does the Bosch 0432191390 replace?

Cummins 3948636 and 3948635, Case J948636 and CNH 87422170 and 87422171.

Will it fit my Case IH STX325 or STX275?

Case IH parts books list it for both, and for the FLX3010, FLX3510, FLX4010 and FLX4510 floaters. They also list a second injector, Case J948529, for the same machines, so call 530-668-0818 with your engine serial number before you order.

Is this the same injector as the Cummins 6CT 8.3L one?

No. The mechanical 6CT takes Bosch 0432191812, which opens at 205 to 219 bar. This one opens at 300 to 314 bar. They are different parts, so order by the number on your old injector.

Is it new, and is there a core?

It is a new Bosch nozzle and holder assembly, sold outright. There is no core to return.

Related Parts

• Cummins ISC 8.3L, Case IH & New Holland Common-Rail Fuel Injector | Bosch 0445120272 New
• Cummins ISL & QSL 8.9L, Case IH, New Holland & Komatsu Fuel Injector | Bosch 0445120236 New (Cummins 5263308)
• Cummins ISC 8.3L Injector, Case IH/New Holland | 0986435532 | Bosch Authorized Remanufactured by VFI
• Mechanical 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.