This is the Bosch 0432131749, a new mechanical fuel injector for Cummins B Series engines: the 4BT 3.9L four-cylinder and the 6BT and 6BTA 5.9L six-cylinder, which Case calls the 6T-590 and 6TA-590. Catalogs list it for a long run of Case and Case IH equipment, from 580 Series 2 loader backhoes to MX Maxxum tractors, and for Komatsu, Hesston and other machines with the same engines. 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 3929490 and 3802677 and Case / New Holland J929490. The holder is a Bosch KDAL59P16, catalogs also list it by the short ID 9490, and it opens at 240 to 254 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 emissions-certified builds of these engines, and Case built several machines with either this injector or the Bosch 0432131835 (Case J919343), depending on the engine. Match the number before you order.

Specifications

Fits / Applications

• Cummins 4BT 3.9L and 6BT 5.9L engines, 6BTA included, that call for injector 3929490 or 3802677
• Case loader backhoes: 580L Series 2, 580 Super L Series 2, 580M, 580 Super M, 590 Super L Series 2 and 590 Super M
• Case crawlers 550G, 550H, 650H, 750H, 850H, 650K and 750K Series 1, wheel loader 621C, skid steers 60XT and 70XT, excavators CX130 and CX160, 960 trencher and 688G telehandler
• Case IH Maxxum MX100, MX110, MX120, MX135, MX150 and MX170 tractors, 2144 and 2344 combines, 8870 and 8880 windrowers, SPX3150 and SPX3185 Patriot sprayers
• Also listed by two catalogs: Komatsu D39P, D41E-6C, PC150LC-6 and WA120-3L, Hesston 8450, 8500 and 8550S, Kobelco SK150, Kawasaki 65Z, Skytrak 6036, 8042 and 10541, AGCO 8745, 8775, RT115 and RT130, White 8310
• Case 1150G, 650G, 850G, 621B, 9010B, 9020B, 9030B, 90XT and 95XT and the Case IH 8850 windrower: built with this injector or with Bosch 0432131835 (Case J919343), 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 0432131749  ·  Cummins 3929490  ·  Cummins 3802677  ·  Case / New Holland J929490  ·  Case reman exchange number JR929490  ·  Bosch nozzle holder KDAL59P16

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 0432131749 replace?

Cummins 3929490 and 3802677, and Case / New Holland J929490. It also takes the place of the remanufactured exchange injector JR929490. The holder is a Bosch KDAL59P16 and the short ID is 9490.

Will it fit my Case 580L Series 2 or 580M?

Catalogs list J929490 for the 580L Series 2, 580 Super L Series 2, 580M and 580 Super M. On the 580L Series 2 and 580M it is the injector for the turbocharged engine: the non-turbo 4B takes a different one, Case J930573 (Bosch 0432131698). Check the ID on your old injector, 9490 for this one, or call 530-668-0818 with the machine serial number.

Can I use it in place of the Bosch 0432131835?

Order the number that came out of the engine. Catalogs list the 0432131835 (Cummins 3919343, Case J919343) for the earlier rotary pump engines without emissions certification, and this one for the emissions-certified engines. Some Case machines were built with either one.

Is the 0432131749 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 7 mm Tip Mechanical Fuel Injector (3919302, 3802327) | Bosch 0432131840 New
• Cummins 4BT 3.9L, Case, Kobelco VE4 Injection Pump 0460424081 | Bosch Authorized Remanufactured by VFI
• Bosch P7100 Inline 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.