Cummins NH855 Engine Parts Catalog – Comprehensive Solutions for Marine and Industrial Applications

Introduction to the Cummins NH855 Engine

The Cummins NH855 engine is a legendary workhorse, trusted for marine and industrial applications worldwide. Known for its robust inline-six-cylinder design, exceptional torque, and long service life, the NH855 powers vessels, generators, compressors, and heavy equipment. These engines are designed to handle demanding environments, from trawlers and fishing vessels to construction and industrial applications.

At Diesel Pro Power, we understand how critical it is to keep your Cummins NH855 running at peak performance. Our extensive catalog of high-quality aftermarket parts offers everything you need—from overhaul kits and water pumps to cylinder heads, fuel systems, and electrical components. Whether you're maintaining a single vessel or an entire fleet, we make it easy to source, order, and receive the parts you need, quickly and efficiently.

Why Choose Diesel Pro Power for Cummins NH855 Parts?

1. 24-Hour Worldwide Shipping

Diesel Pro Power offers fast, reliable shipping worldwide, with all orders processed and dispatched within 24 hours. Our door-to-door delivery service ensures that no matter where your operations are based, your parts will arrive quickly, minimizing downtime and keeping your projects on track.

2. Expert Customer Support

Our customer service team is highly knowledgeable about Cummins NH855 engines and the parts we supply. Whether you're unsure about which part fits your application or need guidance on installation, we're here to help by phone or email.

3. Easy Online Shopping Experience

Our website is designed for easy navigation, even for those who are not experts in diesel engines. Browse parts by category or use our powerful search function to locate exactly what you need. Each product includes detailed descriptions, specifications, and compatibility information to ensure the correct fit.

4. Trusted by Over 40,000 Customers

With over 40,000 satisfied customers worldwide, Diesel Pro Power has built a reputation for reliable aftermarket solutions, high-quality products, and exceptional customer service.

Extensive Catalog Parts For Cummins NH855 Engines

Engine Overhaul Kits for Cummins NH855 Engines For Cummins NH855

Our comprehensive overhaul kits are designed to fully restore your NH855 engine to peak performance. These kits include:

• Cylinder Liners and Pistons: Precision-engineered components for optimal compression and durability.

• Complete Gasket Sets: Upper and lower gasket kits to reseal the engine and prevent leaks.

• Bearings and Seals: For crankshaft, camshaft, and connecting rod assemblies, ensuring smooth operation.

These aftermarket kits are designed to meet or exceed performance standards, offering a cost-effective solution for extending the life of your Cummins NH855.

Fresh Water Pumps and Accessories For Cummins NH855

Cooling is vital for the NH855, and our fresh water pumps are built to handle high-flow demands in marine and industrial systems. Available accessories include:

• Thermostats: For precise coolant temperature regulation.

• Radiator Cleaners: To remove scale and deposits from the cooling system.

• Pump Seals and Gaskets: For leak-free installation.

Sea Water Pumps and Accessories For Cummins NH855

For vessels operating in saltwater environments, our sea water pumps are built with corrosion-resistant materials. Available options include:

• Pump Assemblies: For consistent cooling performance in harsh conditions.

• Zinc Anodes and Strainers: Protect your pump and system from corrosion and debris.

• Thermostats: Ensure proper engine temperature control.

Cylinder Heads and Related Components For Cummins NH855

Maintain compression integrity and airflow efficiency with our range of cylinder heads and components, including:

• Complete Cylinder Heads: With Valves

• Injector Tubes, Seals, and Gaskets: For precise fuel delivery and leak-free operation.

• Replacement Valves and Springs: Ensure optimal sealing and performance.

Piston Kits and Related Components For Cummins NH855

Our piston kits are essential for rebuilding the combustion chamber of your NH855 engine. Kits include:

• Pistons, Rings, Wrist Pins, and Clips: Available in standard and oversized options.

• Cylinder Liners: Ensure smooth piston movement and seal integrity.

Fuel Pumps and Components For Cummins NH855

Fuel delivery is critical for performance and efficiency. Our aftermarket fuel pumps feature:

• High-Pressure Output: For reliable fuel delivery.

• Seals and Gaskets: To prevent leaks and maintain system pressure.

• Fuel Lines and Connectors: Ensure secure connections.

Gauges and Monitoring Components For Cummins NH855

Monitor your NH855’s health with our selection of gauges:

• Oil Pressure and Temperature Gauges: For early detection of lubrication issues.

• Tachometers: Monitor engine RPM to maintain efficiency.

• Fuel and Water Temperature Gauges: Critical for safe operation.

Starters and Alternators For Cummins NH855

Dependable starts and power generation with our starters and alternators:

• High-Torque Starters: For reliable engine cranking.

• Heavy-Duty Alternators: Maintain electrical system performance under load.

Filters (Fuel, Oil, Air) For Cummins NH855

Protect engine systems with our filters:

• Fuel Filters and Water Separators: Remove contaminants and prevent injector damage.

• Oil Filters: Keep engine oil clean and free of debris.

• Air Filters: Protect against dust and debris ingress.

Connecting Rods and Related Components For Cummins NH855

Maintain engine balance and integrity with connecting rods, featuring:

• High-Strength Steel Construction: For durability under high-load conditions.

• Bearing Sets and Bolts: For secure installation.

Turbochargers and Components For Cummins NH855

Enhance engine power with our turbo solutions:

• Turbocharger Assemblies: Improve combustion efficiency.

• Gaskets, Seals, and Clamps: For secure installation.

• Intercooler Hoses and Clamps: Ensure optimal airflow.

Exhaust Components and Accessories For Cummins NH855

Control emissions and maintain performance with our exhaust components:

• Manifolds, Elbows, Gaskets, and Clamps: For leak-free exhaust routing.

• Insulation Wraps: Protect nearby components from heat.

Gaskets and Seals For Cummins NH855

Prevent leaks and maintain system integrity with our gasket sets, including:

• Cylinder Head Gaskets

• Exhaust and Intake Manifold Gaskets

• Oil Pan and Water Pump Gaskets

Sensors and Switches For Cummins NH855

Monitor and control engine systems with sensors and switches, including:

• Oil Pressure and Temperature Sensors

• Fuel Pressure and Coolant Sensors

• Switches for Oil, Fuel, and Coolant Systems

Manuals and Tools For Cummins NH855

Access essential resources and tools for maintenance and repair:

• Service Manuals: Step-by-step instructions and diagrams.

• Specialty Tools: For precise adjustments and installations.

Hoses, Clamps, and Related Components For Cummins NH855

Secure fluid connections with durable hoses and clamps, including:

• Coolant and Oil Hoses: Designed for high-pressure systems.

• Heavy-Duty Clamps and Fittings: For leak-free performance.

Cummins NH855 Engine FAQ

1. What is the Cummins NH855 engine commonly used for?
   The Cummins NH855 engine is primarily used in marine and industrial applications, including commercial fishing vessels, power generation, construction equipment, and mining operations. It’s renowned for its robust inline-six-cylinder design and high torque output, making it ideal for heavy-duty tasks.

2. How often should I perform maintenance on the NH855?
   Routine maintenance such as oil and filter changes, coolant system checks, and fuel system inspections should be performed every 250–500 operating hours. Comprehensive inspections and component replacements, like belts and hoses, are generally recommended every 1,000–2,000 hours, depending on usage conditions.

3. How can I identify the correct NH855 parts for my engine?
   You can identify correct parts by referencing the engine serial number (ESN) found on the engine data plate. Diesel Pro Power’s parts catalog makes it easy to match parts by ESN or engine model to ensure proper fit and function.

4. What are common issues to watch for in an NH855 engine?
   Common issues include cooling system leaks, worn fuel injectors, oil leaks from seals or gaskets, and turbocharger wear. Proactive maintenance and using quality aftermarket parts can prevent costly repairs.

5. Can I use aftermarket parts instead of OEM for the NH855?
   Yes! Diesel Pro Power offers high-quality aftermarket parts designed to meet or exceed performance standards, providing a cost-effective alternative to OEM components.

Cummins NH855 Overhaul Kits FAQ

1. What components are included in a Cummins NH855 overhaul kit?
   Diesel Pro Power’s overhaul kits include cylinder liners, pistons, piston rings, wrist pins, bearings, complete upper and lower gasket sets, and seals for a comprehensive engine rebuild.

2. When should I consider an overhaul for my NH855 engine?
   An overhaul is recommended when there are signs of reduced compression, oil consumption, loss of power, excessive blow-by, or high wear in critical components.

3. Can I perform the overhaul myself, or should I hire a professional?
   While a skilled technician can tackle an overhaul, precision measurements, torque specifications, and special tools are often required. For best results, it’s recommended to have a professional engine rebuilder perform the work.

4. Do aftermarket overhaul kits offer the same quality as OEM?
   Diesel Pro Power’s aftermarket overhaul kits are built to match or exceed OEM quality, offering durability and performance at a more affordable price.

5. How long does an overhaul take?
   The time varies based on experience and tools available, but typically an NH855 overhaul can take anywhere from 40 to 80 labor hours for a complete job.

Cummins NH855 Cylinder Heads FAQ

1. What are common symptoms of a failing cylinder head?
   Symptoms include coolant leaks, white smoke from the exhaust, compression loss, misfires, or overheating, often due to cracks or head gasket failure.

2. Should I replace the entire cylinder head or just components?
   If the head is cracked, warped, or damaged beyond resurfacing, a complete replacement is recommended. However, valves, springs, and seals can often be replaced individually if the head is structurally sound.

3. Are Diesel Pro Power’s cylinder heads aftermarket or OEM?
   Our cylinder heads are high-quality aftermarket replacements, engineered to meet rigorous performance standards and compatibility requirements.

4. Do cylinder heads come pre-assembled?
   Diesel Pro Power offers cylinder heads with or without valves and valve springs, allowing customers to choose the best option for their needs.

5. What’s the recommended installation process for a cylinder head?
   Always follow Cummins service guidelines, including proper torque sequences and specifications, replacing head bolts if recommended, and using high-quality gaskets for a reliable seal.

Cummins NH855 Raw Water Pumps FAQ

1. What is a raw water pump and why is it critical in a marine engine?
   A raw water pump draws seawater into the engine’s cooling system, transferring heat from the engine block to the surrounding water. It’s essential for preventing overheating in marine environments.

2. What are signs of a failing raw water pump?
   Look for reduced water flow, overheating, leaks around the pump housing, or noisy operation, which can indicate worn impellers, seals, or bearings.

3. How often should I replace the raw water pump impeller?
   It’s generally recommended to replace the impeller every season or annually, depending on operating conditions and usage frequency.

4. Are raw water pumps from Diesel Pro Power aftermarket parts?
   Yes, our raw water pumps are aftermarket components, engineered for durability and designed to withstand the harsh conditions of marine environments.

5. Can I replace the raw water pump myself?
   Yes, with basic tools and a service manual, many owners can replace the pump themselves. However, care must be taken to ensure seals are properly seated and the pump is primed.