Caterpillar 3406E Marine Raw Water Pump & Cooling System Components

The Caterpillar 3406E is a high-performance marine engine trusted in commercial, industrial, and offshore applications worldwide. To keep this engine operating at peak reliability, its raw water pump and cooling system must function flawlessly. At Diesel Pro Power, we supply a complete range of aftermarket raw water pumps and cooling system components designed specifically for the Caterpillar 3406E. With over 40,000 satisfied customers and shipping to more than 180 countries, we are the go-to source for marine operators who demand quality, reliability, and fast delivery.

Marine Raw Water Pump for Caterpillar 3406E

The raw water pump is the heart of the 3406E’s cooling system. It draws seawater into the system, circulating it through heat exchangers and other cooling components to regulate engine temperature.

• Heavy-Duty Construction – Built for durability in demanding saltwater environments.

• Optimized Flow Rate – Ensures consistent circulation to prevent overheating under heavy load.

• Direct Fit for 3406E – Designed to integrate seamlessly into Caterpillar 3406E cooling configurations.

• Marine-Grade Seals and Bearings – Protects against leaks and premature wear.

By replacing a failing raw water pump promptly, operators can avoid catastrophic overheating and extend the life of their Caterpillar 3406E engine.

Mounting Gaskets, Seals & Clamps

Pump Gaskets

A properly sealed pump ensures that seawater flows efficiently without leaks. High-quality marine-grade gaskets provide the tight, durable seal required to withstand vibration and pressure changes.

O-Rings and Seals

The Caterpillar 3406E raw water pump uses precision-engineered O-rings to prevent leaks at critical connection points. Regular replacement is recommended during pump servicing.

Marine Pump Clamps

Stainless-steel clamps secure the raw water pump assembly in place. Their corrosion-resistant design ensures they hold firm even in harsh saltwater conditions.

Marine Pump Tools & Accessories

Impeller Puller

Removing impellers for servicing can be difficult without the proper tool. The impeller puller allows for safe, efficient extraction of impellers during pump maintenance, minimizing the risk of damaging the pump housing.

Zinc Anodes for Caterpillar 3406E

Zinc anodes are essential to protecting the raw water pump and cooling system from galvanic corrosion. Acting as sacrificial metals, they corrode in place of more critical components.

• Different Thread Sizes Available – Ensures compatibility with the Caterpillar 3406E’s water passages.

• Various Lengths and Diameters – Designed to fit multiple points within the cooling system.

• Scheduled Replacement – Zincs should be checked every service interval to ensure ongoing protection.

Neglecting zinc replacement can lead to pitting, internal corrosion, and premature pump or heat exchanger failure.

Marine-Grade Silicone Hoses

Silicone coolant hoses play a crucial role in connecting the Caterpillar 3406E’s cooling system components.

• High Heat Resistance – Withstands extreme marine operating temperatures.

• Flexible and Durable – Resists cracking, swelling, or collapsing under suction.

• Multiple Diameters Available – Ensures a perfect fit for different sections of the engine’s cooling circuit.

• Cut-to-Length Options – Hoses are available by the foot, allowing for customized installation.

By replacing old or worn hoses with marine-grade silicone, operators ensure leak-free performance and reduced risk of cooling system failure.

Hose Clamps for Caterpillar 3406E Cooling System

Hose clamps provide secure connections throughout the cooling system.

• Corrosion-Resistant Construction – Essential for long life in saltwater applications.

• Wide Diameter Range – Fits everything from small bypass hoses to large seawater intake hoses.

• Reliable Grip Under Pressure – Maintains a leak-free seal even with vibration and fluctuating pressures.

Replacing clamps during routine service prevents failures that could result in leaks and system downtime.

Marine Cooling System Monitoring – Gauges & Controls

Mechanical and Electric Gauges

Monitoring engine temperature and coolant flow is critical. Available gauges include:

• Standard mechanical gauges for straightforward monitoring.

• Alarm-equipped gauges for early warning of overheating.

• Electric gauges in both 12V and 24V configurations for versatile installation.

Marine Controls & Cables

From throttle control to cooling system adjustments, marine cables and controls ensure precise operation. Diesel Pro Power provides a complete line of controls compatible with Caterpillar 3406E-powered vessels.

Why Choose Diesel Pro Power for Caterpillar 3406E Cooling Parts

When it comes to sourcing raw water pumps and cooling system components for the Caterpillar 3406E, Diesel Pro Power stands apart as the trusted partner for marine and industrial operators worldwide. A properly maintained cooling system is critical to avoiding overheating, ensuring fuel efficiency, and extending engine life, and Diesel Pro Power makes it easier than ever to find every component in one place.

Trusted by 40,000+ Customers Worldwide – From tugboats navigating busy ports to offshore platforms operating in remote waters, operators depend on our proven reliability. Our long track record demonstrates that when downtime is not an option, Diesel Pro Power delivers consistent results.

Shipping to 180+ Countries – Marine engines operate across the globe, and our distribution network reflects that. With fast, trackable delivery, customers know exactly when parts will arrive, minimizing costly interruptions to schedules and operations.

Complete Marine Catalog – Our catalog goes beyond just raw water pumps. Customers have access to a full range of cooling system parts for the Caterpillar 3406E: impellers, zincs, hoses, clamps, gaskets, gauges, seals, and related hardware. Having everything in one place eliminates the need to juggle multiple suppliers, saving both time and money.

Exclusive Marine & Industrial Focus – Unlike general parts retailers, Diesel Pro Power is dedicated exclusively to heavy-duty engines. That meanse no distractions with automotive or light-duty products. Every component we supply is designed for the harsh conditions that engines like the Caterpillar 3406E face in marine and industrial environments.

Expert Technical Support – Our team provides personalized guidance for every stage of cooling system maintenance. Whether you need help with impeller sizing, zinc replacement intervals, troubleshooting pump performance, or planning a complete rebuild, our technical staff ensures you make the right decision the first time.

By choosing Diesel Pro Power, Caterpillar 3406E operators gain more than just parts—they gain a reliable aftermarket partner committed to keeping engines running efficiently while lowering overall maintenance costs. From global fleets to individual vessel owners, Diesel Pro Power remains the go-to source for dependable cooling system solutions.