Cummins 4BT 6BT Fuel Shutoff Solenoid | 3991167 | 12V

12-volt fuel shutoff (shutdown) solenoid for the Cummins 4BT and 6BT (3.9L/5.9L) B-series engines. Part number 3991167 controls fuel shutoff to the injection pump for engine start and controlled shutdown. It's widely used on Case IH and Case construction equipment and other industrial applications. Energize-to-run design.

Key Features:

• 12V fuel shutoff (shutdown) solenoid for the Cummins 4BT / 6BT B-series
• Controls fuel supply shutoff at the injection pump for engine start and shutdown
• Energize-to-run type
• Direct replacement for Cummins 3991167 (also SA-4941-12)
• Common on Case IH / Case equipment and Hyundai excavators

Specifications:

• Base part number: 3991167 (also SA-4941-12)
• Component type: Fuel shutoff (shutdown) solenoid
• Voltage: 12V
• Design: energize-to-run
• Engine: Cummins 4BT / 6BT (3.9L / 5.9L)

Compatibility / Fitment:

• Cummins 4BT / 6BT (3.9L / 5.9L) diesel engines
• Case IH tractors (MX100/MX120/MX150, 5120–5250) and Case skid steers/loaders (1840, 1845C, 60XT–95XT, 580–588G, 1150H); Hyundai excavators (R130, R170)
• Mounting bracket varies by machine — the part number is shared, but bracket/bolt-hole positions can differ by application; compare to your original before ordering
• Not interchangeable with the 6BT SA-4756-12 (3932529) or the 3935649 (SA-4764-12) solenoids — different units
• Common cross-references: 3964627, J932529, SA-4941-12

Conclusion:

The 3991167 is a 12V fuel shutoff solenoid for Cummins 4BT/6BT engines, controlling fuel shutoff at the injection pump on start and shutdown. It's widely used on Case and Hyundai equipment. Compare your mounting bracket to the original before ordering, as bracket positions vary by machine.