Fuel Transfer Pump Check Valve Cummins 3967782 | 4933571

High-Performance Fuel Transfer Pump Check Valve for Cummins Engines

The Cummins 3967782 check valve is a critical component designed to regulate fluid dynamics within your engine’s fuel system. Installed at the fuel transfer pump connector, this valve ensures unidirectional fuel flow, preventing backflow and maintaining the precise system pressure required for efficient combustion. This part is also available under the numbers: 4933571.

Engineered to withstand high pressures and extreme operating temperatures, this check valve helps protect your fuel system from pressure drops and contamination. Replacing a worn or faulty check valve is essential for restoring engine performance, preventing hard starts, and ensuring consistent fleet uptime.

Engine Compatibility and Applications

This fuel transfer pump check valve is designed for a wide range of heavy-duty Cummins diesel engines, including:

• Cummins ISC Series: ISC 8.3, ISC CM2150, ISC CM850
• Cummins ISL Series: ISL 8.9, ISL CM2150, ISL CM850, ISL9
• Cummins QSC Series: QSC 8.3, QSC8.3 CM850
• Cummins QSL Series: QSL 8.9, QSL9 CM2350, QSL9 CM850
• Other compatible engines: 6B5.9, 6C8.3, ISBE4, ISLE4

Key Features and Benefits

• Unidirectional Flow Control: Prevents fuel backflow to maintain consistent fuel line pressure.
• Heavy-Duty Construction: Built with premium, corrosion-resistant materials to withstand extreme engine environments.
• Direct Fit Replacement: Matches exact factory specifications for a seamless, leak-free installation.
• Optimized Performance: Helps eliminate hard starting, rough idling, and fuel starvation issues.

Cross-Reference / Interchange Part Numbers

This part replaces / is interchangeable with the following part numbers:

• 3967782
• 4933571