Fuel Return Pipe / Fuel Line 3960041 for Cummins Engine 4B 4BT Replacement

Fuel Return Pipe / Fuel Line for Cummins Engine 4B 4BT

This fuel return pipe / fuel line is a direct replacement part for Cummins 4B and 4BT diesel engines, OEM cross-reference number 3960041 ensures proper fitment and function.

Overview

This fuel return pipe / fuel line is designed to transport excess fuel from the injectors back to the fuel tank on Cummins 4B and 4BT engines. It is an essential component for maintaining fuel system pressure and preventing vapor lock. Ideal for heavy-duty applications, this fuel return pipe ensures reliable performance and longevity.

Built For Performance

• Constructed from durable steel tubing for high-pressure resistance
• Precision-bent to match OEM specifications for exact fit
• Corrosion-resistant coating extends service life
• Includes necessary fittings and connectors for easy installation
• Meets or exceeds OEM quality standards

Fits These Machines

• for Cummins 4B engine
• for Cummins 4BT engine

On-The-Job Use

• Used in heavy-duty trucks and construction equipment with Cummins 4B/4BT engines
• Commonly replaced during fuel system overhaul or repair
• Essential for generator sets and industrial machinery powered by these engines

Specs At A Glance

Good To Know

Q: Is this fuel return pipe compatible with all Cummins 4B engine variants? A: This part is designed for standard 4B and 4BT engines; verify your engine serial number for exact match.

Q: Can I install this myself? A: Installation requires basic mechanical skills and standard tools; consult your service manual for proper routing and torque specifications.

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