Parts for Caterpillar 3408B – Marine Water Pump & Cooling System Section

The Caterpillar 3408B marine engine is a workhorse trusted in demanding maritime environments. To keep it running at peak performance, a dependable cooling system is essential. The raw water pump, impellers, zinc anodes, hoses, and clamps listed below are designed specifically for the Caterpillar 3408B. These components protect the engine from overheating, extend its life, and keep vessels operating without interruption.

Marine Water Pumps for Caterpillar 3408B

1. Marine Water Pump for Caterpillar 3408B

• Heavy-duty raw water pump engineered for continuous duty in marine conditions.

• Includes C-Clamps for secure installation.

• Designed to circulate seawater efficiently through the cooling system, maintaining safe operating temperatures under heavy loads.

2. Marine Sea Water Pump for Caterpillar 3408B

• Built for durability in saltwater environments.

• 2” flange port design allows for steady, high-volume seawater intake.

• Precision-machined for a perfect fit on the Caterpillar 3408B, ensuring reliability and long service life.

Why Pumps Are Essential for the 3408B:
The raw water pump is the heart of the 3408B’s cooling system. Without steady seawater circulation, the engine can quickly overheat, leading to severe wear or catastrophic failure. Reliable pumps built to marine-grade standards keep vessels operational and protect the investment in your 3408B engine.

Impellers for Caterpillar 3408B Water Pumps

3. Impeller for Caterpillar 3408B Pumps

• 20-blade key drive inset design for strong, consistent seawater circulation.

• Dimensions: 5 5/8” diameter, 15/16” height.

• Maintains smooth cooling performance even under continuous heavy operation.

4. Bronze Impeller for Caterpillar 3408B Pumps

• 20-blade bronze construction for maximum resistance to wear and corrosion.

• Ideal for tough marine environments where reliability is critical.

5. High-Flow Impeller for Caterpillar 3408B Pumps

• 32-blade bronze impeller designed for maximum water movement.

• Provides additional cooling capacity for engines running at higher loads.

Why Impellers Matter:
Impellers wear over time as they spin against seawater and debris. A worn impeller reduces flow, risks overheating, and places unnecessary strain on the 3408B. Replacing impellers on schedule ensures the engine maintains proper cooling capacity and avoids costly downtime.

Zinc Anodes for Caterpillar 3408B

6–13. Zinc Anodes for Caterpillar 3408B Pumps and Cooling System

• Available in a variety of NPT sizes: 1/4”, 3/8”, 1/2”, 3/4”, and 1 1/4”.

• Different lengths and diameters provide options for every fitting location.

• Protect the water pump and cooling passages from galvanic corrosion.

• Simple, low-cost parts that extend the life of expensive components.

Why Zinc Anodes Are Critical:
Seawater is highly corrosive, and the 3408B relies on zinc anodes as sacrificial protectors. These anodes absorb corrosive activity, preventing damage to the pump housing, heat exchangers, and engine block. Replacing them regularly is one of the most effective ways to safeguard your Caterpillar 3408B cooling system.

Silicone Coolant Hoses for Caterpillar 3408B

14–25. Silicone Coolant Hoses for Caterpillar 3408B

• Available in sizes from 1” to 4” inside diameter.

• Sold in 1-foot lengths for flexibility in installation.

• Built with silicone reinforcement for durability, flexibility, and resistance to high heat and saltwater exposure.

• Essential for maintaining secure, leak-free coolant connections between the pump, heat exchangers, and engine block.

Why Silicone Hoses Are Recommended:
Unlike standard rubber hoses, silicone hoses last longer, resist cracking, and withstand high-temperature cycles. They are an excellent upgrade for the Caterpillar 3408B cooling system, reducing maintenance frequency and unexpected failures.

Hose Clamps for Caterpillar 3408B

26–30. Marine-Grade Hose Clamps for Caterpillar 3408B

• Range of sizes designed to fit all coolant and raw water hoses on the 3408B.

• Constructed for durability, ensuring secure seals under vibration and pressure.

• Easy to install and replace, preventing costly leaks and ensuring uninterrupted cooling performance.

Why Clamps Are Vital:
Even the strongest hoses are only as reliable as the clamps that hold them. Marine-grade clamps for the 3408B provide peace of mind by maintaining tight, leak-proof connections in the most demanding marine environments.

Why Buy the Raw Water Pump for the Caterpillar 3408B from Diesel Pro Power

When it comes to keeping a Caterpillar 3408B marine engine running at peak efficiency, the raw water pump is the lifeline of the cooling system. Without steady and reliable seawater circulation, the engine risks overheating, premature wear, and costly downtime. That’s why choosing the right supplier is just as important as choosing the right part. Diesel Pro Power has earned the trust of more than 40,000 customers worldwide by providing Caterpillar 3408B raw water pumps and cooling components that deliver unmatched reliability, expert support, and global reach.

Proven Trust with 40,000+ Customers Worldwide

From commercial tugboats and offshore supply vessels to fishing fleets and private operators, Diesel Pro Power has built a reputation for reliability. Every Caterpillar 3408B raw water pump we supply is designed to perform in the harshest marine environments, where failure is not an option. With decades of proven service, operators know they can rely on us to deliver the right parts the first time.

Global Shipping to 180+ Countries

Marine operations can’t afford delays, especially when a vessel is stranded due to a cooling system failure. Diesel Pro Power offers fast, trackable delivery to over 180 countries. Whether your Caterpillar 3408B engine is running in a harbor, on an offshore platform, or across international shipping routes, we make sure your raw water pump and components reach you quickly, minimizing costly downtime.

A Complete Catalog for the Caterpillar 3408B Cooling System

The raw water pump is the centerpiece of the 3408B’s cooling system, but it’s only one part of the puzzle. Diesel Pro Power makes sourcing easy by providing a complete, engine-specific catalog. From impellers and zinc anodes to silicone hoses and clamps, everything you need to maintain your Caterpillar 3408B cooling system is available in one place. This streamlined approach saves operators time, prevents compatibility issues, and ensures long-term system reliability.

Exclusive Marine & Industrial Focus

Unlike general suppliers that try to cover everything from cars to small machinery, Diesel Pro Power is dedicated exclusively to heavy-duty marine and industrial engines. That means our team understands the unique demands placed on the Caterpillar 3408B in saltwater environments. Our focus ensures that every raw water pump and cooling component we provide meets the high standards required for continuous marine service.

Expert Technical Support

Even the most experienced engineers occasionally need guidance when it comes to impeller sizing, zinc replacement schedules, or troubleshooting pump performance. Diesel Pro Power provides direct access to technical experts who understand the Caterpillar 3408B inside and out. Whether you’re installing a new raw water pump, rebuilding an existing one, or setting a preventive maintenance schedule, our team can help ensure your engine’s cooling system runs flawlessly.

Reliability that Protects Your Investment

The Caterpillar 3408B is a powerful and expensive asset. Protecting it requires reliable parts and a supplier that understands the stakes of marine operations. By sourcing your raw water pump and cooling system components from Diesel Pro Power, you gain peace of mind knowing that your engine is protected against overheating, corrosion, and performance loss.