Fuel Pumps, Fuel Filters & Related Components for Cummins NH855

The Cummins NH855 engine depends on a reliable fuel delivery and filtration system to perform at its best. Diesel fuel must be delivered at the correct pressure, remain free from contaminants, and be properly controlled for smooth and efficient operation. That’s why keeping the fuel pumps, shutoff valves, solenoids, filters, and related components in good condition is essential.

At Diesel Pro Power, we stock everything you need to maintain or restore the NH855’s fuel system. With over 40,000 satisfied customers worldwide, we are committed to providing high-quality Cummins parts, fast shipping, and unmatched service.

Fuel Pumps & Couplings for Cummins NH855

The heart of the NH855 fuel system is the fuel pump. Over time, vibration, heat, and constant operation can wear down seals and couplings.

• Fuel Pump Gaskets – Designed to prevent leaks at the pump coupling, ensuring consistent fuel delivery and preventing air intrusion that can cause hard starts.

• Fuel Pump Couplings – Heavy-duty couplings connect the pump to the drive system, transmitting torque reliably under demanding loads.

Both gaskets and couplings are simple but vital components—when they fail, they can stop your engine cold. Replacing them proactively helps maintain uptime and performance.

Fuel Shutoff Valves & Solenoids

Controlling fuel flow is critical for both safety and operation. The NH855 uses electrically controlled shutoff solenoids to cut fuel flow when the engine is shut down.

• 12-Volt Fuel Shutoff Valves – Common in many industrial applications, ensuring precise shutoff at ignition switch off.

• 24-Volt Fuel Shutoff Valves – Designed for higher voltage systems, typically found in marine and heavy equipment setups.

• Solenoids – Available in 12V and 24V, both single pole and dual pole designs. These are rugged and built to handle repeated cycles in demanding conditions.

Alongside the solenoids, rectangular seal rings ensure leak-free mounting, keeping your system sealed against pressure loss and contaminants.

Fuel Filters & Water Separators

Clean fuel is non-negotiable for a long-lasting Cummins NH855. Diesel is prone to contamination from water, sediment, and microbial growth, so quality filtration is critical.

• Standard Fuel Filters – Compact, high-efficiency filters designed to remove particles and protect the injectors from damage.

• Fuel Filter & Water Separator Units – These combine filtration with water separation, a must for marine and humid environments where water contamination is more common.

• Racor Replacement Systems – High-capacity filter units (500, 900, 1000 series) are ideal for vessels and heavy industrial machinery requiring additional protection.

Each separator can be matched with filter elements in multiple ratings:

• 2 Micron Elements – For ultra-fine protection, removing the smallest contaminants.

• 30 Micron Elements – For primary filtration in systems where larger debris and water contamination are more common.

This layered approach extends injector life, prevents performance loss, and ensures consistent fuel economy.

Supporting Tools & Accessories

• Fuel Filter Removal Wrench – Designed for the specific filter sizes used on Cummins and Detroit Diesel engines, making maintenance easier.

• Zinc Anodes for Fuel & Oil Coolers – Essential in marine applications to prevent corrosion inside cooler systems, extending service life.

Fuel System Pressure Switches & Monitoring

Maintaining proper fuel pressure is critical to the NH855’s operation. Fuel and oil pressure switches provide protection by monitoring levels and triggering alarms or shutdowns when pressure drops below safe limits.

• Pressure Switches – Available in a range of PSI ratings (5, 10, 20, 27), allowing you to configure safety settings to your system’s needs.

• Mechanical & Electrical Gauges – Available for both 12V and 24V systems, these gauges provide real-time monitoring so operators can detect issues before they become costly failures.

Why Choose Diesel Pro Power for Cummins NH855 Fuel System Parts?

• Extensive Inventory – From small gaskets to full filter assemblies, everything is in stock and ready to ship.

• Worldwide Reach – Serving customers in over 180 countries.

• Trusted by Professionals – Over 40,000 satisfied customers, including shipyards, fleet operators, and independent repair shops.

• Easy Ordering – Intuitive online catalog designed to get you the correct NH855 part the first time.