BUYMACHINERYPARTS 12V Fuel Shut-Off Solenoid for Cummins 5.9L & 8.3L Engines — 3-Bolt, 3-Pin Direct Fit (Part 3935649)

This aftermarket shut-off solenoid (part 3935649) provides an electrically controlled way to cut fuel supply on compatible Cummins and Komatsu diesel engines. Built to match common replacement interchange numbers, it uses a three-bolt mounting pattern and a three-pin electrical connector so it fits into many existing installations without extensive modification. Verify your original part number before ordering to ensure compatibility.

How does this solenoid fit my Cummins engine?

The unit is made to work with Cummins 4B, 6B, and 6C engine families in 5.9L and 8.3L displacements that use Bosch P7100 injection pumps. It uses standard 3-inch bolt spacing and a three-pin plug so it lines up with common factory mounting points. Confirm the OEM or interchange numbers printed on your current solenoid to be sure of a match.

• Compatible with Cummins 5.9L and 8.3L models using Bosch P7100 pumps
• 3 inch mounting bolt spacing and three-pin connector for direct fit
• Cross-references include 3930234, 4946639 and SA494124

Which part numbers does this replace?

This aftermarket valve is offered as an equivalent to several factory and aftermarket references, making it a practical replacement when original parts are unavailable. Use the interchange list to cross-check with your engine’s parts book or the tag on your existing solenoid. Always inspect thread sizes and connector style before installing.

• Interchange numbers: 3930234, 4946639, SA494124 and SA-4335-24
• Also referenced as FS30E-24, BG2X9N392AA, 2UO130764
• Check physical dimensions and connector type for final confirmation

What are the electrical and mechanical specs I need to know?

This is a 12-volt DC shut-off solenoid designed for inline mounting near the injection pump. The three-pin connector accepts standard harnesses used on compatible diesel engines, and the bolt spacing follows a common 3-inch pattern for straightforward installation. It is intended for use as a replacement part rather than a performance upgrade.

• Operating voltage: 12V DC
• Mounting: 3 inch bolt spacing for direct replacement
• Connector: three-pin electrical plug for OEM harness compatibility

Can I use this on Komatsu engines or other applications?

Yes — some Komatsu models that share the same pump and mounting arrangements accept this solenoid. It’s important to compare the original part number and physical characteristics since fitment depends on pump model and mounting geometry. If your equipment uses different pumps or altered mounts, an adapter or different part may be required.

• Compatible with certain Komatsu 8.3L applications sharing Bosch P7100 pump layout
• Not universal — confirm part number and mounting before purchase
• May work across multiple brands when physical and electrical specs match

Who this is for: This replacement solenoid suits mechanics, fleet technicians, and DIY owners who need a direct-fit fuel shut-off for Cummins 5.9L and 8.3L engines or compatible Komatsu models. It’s aimed at those who have verified interchange numbers and are seeking a practical, cost-effective OEM-style replacement rather than an aftermarket performance part.