12V Shut Down Solenoid 125-5773 For Caterpillar 3204 3304 3304B 3306 3306B

12V Shut Down Solenoid 125-5773 for Caterpillar

This 12V shut down solenoid, cross-referenced as 125-5773, is a replacement fuel cutoff solenoid for Caterpillar engines in the 3204, 3304, 3304B, 3306, and 3306B series. It provides reliable engine shutdown by moving the fuel stop lever when energized, matching the electrical and mechanical characteristics of the original part. This solenoid is designed for off-highway and industrial applications where a consistent 12V shutdown signal is available.

Overview

This 12V shut down solenoid is an electromagnetic actuator used to stop fuel flow in Caterpillar diesel engines, including the 3204, 3304, 3304B, 3306, and 3306B models. It replaces part number 125-5773 and integrates with the engine's fuel injection pump to provide a clean, quick shutdown. The solenoid is suited for service in construction, agricultural, and generator applications where a dependable stop function is critical.

Built For Performance

• Rated for 12V DC power, common in mobile and stationary equipment
• Matches OEM 125-5773 mounting and electrical connector layout
• Robust coil designed for continuous duty during engine stop cycles
• Stainless steel plunger for corrosion resistance and smooth travel
• O-ring seal on the body prevents fuel and oil ingress into the coil
• Operates reliably in ambient temperatures from -40°F to 250°F

Fits These Machines

• for Caterpillar 3204
• for Caterpillar 3304
• for Caterpillar 3304B
• for Caterpillar 3306
• for Caterpillar 3306B

On-The-Job Use

• Used in oil field pumps driven by CAT 3306 engines
• Installed on lift trucks and material handlers with CAT 3204 power
• Applied to irrigation pump sets with CAT 3304 engines
• Common in emergency generator sets for automatic shutdown

Specs At A Glance

Good To Know

Q: Can this solenoid be used on all CAT engines with a 12V system? A: It is specifically intended for the 3204, 3304, 3304B, 3306, and 3306B engines where the mounting bracket and lever geometry match the 125-5773 original. Other CAT engines may use a different solenoid mounting style.

Q: How do I know if this solenoid fits my machine? A: Check the existing solenoid for a stamped part number 125-5773 or measure the mounting center-to-center distance and plunger stroke. Confirm the coil resistance matches the original, typically in the range of 5 to 15 ohms for a 12V solenoid.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.