This is the Bosch 0432131835, a new mechanical fuel injector for turbocharged Cummins B Series engines with the rotary injection pump: the 4BT 3.9L four-cylinder and the 6BT and 6BTA 5.9L six-cylinder, which Case calls the 4T-390 and 6T-590. Catalogs list it for Case 580K and 580L loader backhoes, Case crawlers, loaders and excavators, Case IH Maxxum 5100 and 5200 series tractors and the Komatsu PC200-6 and WA180. It is a complete nozzle and holder assembly with the 7 mm nozzle tip, set and ready to fit, not a rebuild. It replaces Cummins 3919343 and 3280048 and Case J919343. The holder is a Bosch KDAL59P5, catalogs also list it by the short ID 9343, and it opens at 245 to 259 bar. It is sold outright, with no core to send back.

A worn mechanical injector shows up as hard starting, white or black smoke, a rough idle, fuel knock or a loss of power. Low opening pressure and a dribbling nozzle are the usual causes. Replace the sealing washer under the nozzle when you fit a new injector, and it is good practice to do the full set so the cylinders stay balanced. B Series injectors look alike and differ by build. Catalogs list this one for the earlier engines without emissions certification, and Case built several machines with either this injector or the Bosch 0432131749 (Case J929490, the emissions-certified engines), so match the number before you order. Several catalogs also supply this injector for Cummins 3919302, the number Bosch assigns to the 0432131840.

Specifications

Fits / Applications

• Cummins 4BT 3.9L and 6BT 5.9L turbocharged engines, 6BTA included, with the rotary injection pump, that call for injector 3919343
• Case loader backhoes with the turbocharged engine: 580K, 580 Super K, 580L, 580 Super L and 590 Super L before Series 2, and the 590 Turbo
• Case crawlers with the turbocharged engine: 450C, 455C, 650, 850D, 1150E and 1155E
• Case 621 wheel loader, 688 excavator, 780C and 780D loader backhoes
• Case excavators 1085B, 1085C, 1086B, 1088, 880D, 888, 9010, 9020 and 9030, crawlers 855D and 855E and the W11B loader
• Case IH Maxxum 5120, 5130, 5140, 5220, 5230, 5240 and 5250 tractors, 8840 windrower and the Case 1896 tractor
• Komatsu PC200-6 excavator and WA180 wheel loader, Champion 710A and Hyundai 180LC-3
• Case 1150G, 650G, 850G, 621B, 9010B, 9020B, 9030B, 90XT and 95XT and the Case IH 8850 windrower: built with this injector or with Bosch 0432131749 (Case J929490), depending on the engine. Match the number.
• Four injectors on the 3.9L, six on the 5.9L

Clean the injector bore before fitting, use a new sealing washer under the nozzle, and torque the hold-down to the engine maker’s figure. Cap the lines while they are open, bleed the high-pressure lines after fitting, and change the fuel filter.

Part Numbers & Cross Reference

Bosch 0432131835  ·  Cummins 3919343  ·  Cummins 3280048  ·  Cummins 3802327  ·  Cummins 3920528  ·  Cummins 3802331  ·  Case / New Holland J919343  ·  Case J919322  ·  Case reman exchange number JR919343  ·  Bosch nozzle holder KDAL59P5

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 0432131835 replace?

Cummins 3919343, 3280048, 3802327, 3920528 and 3802331, and Case J919343 and J919322. It also takes the place of the remanufactured exchange injector JR919343. The holder is a Bosch KDAL59P5.

Will it fit my Case 580K or 580L?

Catalogs list it for the 580K, 580 Super K, 580L and 580 Super L with the turbocharged Cummins 4BT and the rotary injection pump. These backhoes were built with several injectors, and Series 2 machines take a different one, so check the number on your old injector or call 530-668-0818 with the machine serial number.

Can I use it in place of the Bosch 0432131840?

Several catalogs supply this injector for Cummins 3919302, the number Bosch assigns to the 0432131840, and Bosch gives both the same opening pressure. Cummins 3802327 is listed under both. They are still two Bosch numbers with different holders, so for an exact match order the number on your old injector.

Is the 0432131835 new, and is there a core?

It is a new Bosch nozzle and holder assembly, not a rebuild. It is sold outright, so there is no core to return.

Related Parts

• Cummins 4BT 3.9L & 6BT 5.9L Mechanical Fuel Injector (3926819, 3802547) | Bosch 0432133861 New
• Cummins 4BT 3.9L & 6BT 5.9L Mechanical Fuel Injector (3930131, 3802748) | Bosch 0432131743 New
• Cummins 4BT 3.9L & 6BT 5.9L B-Series Fuel Injector (3932123, 3802905) | Bosch 0432131694 New
• Dodge Ram 5.9L 12-Valve Cummins VE Injection Pump 0460426184 | Bosch Authorized Remanufactured by VFI
• Bosch VE Rotary Diesel Injection Pump 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.