Caterpillar 3412 Marine Raw Water Pump & Cooling Components Catalog

The Caterpillar 3412 is one of the most widely used heavy-duty marine engines, powering tugboats, offshore vessels, cargo ships, and industrial applications worldwide. Keeping this engine cool under continuous operation is critical, and the raw water pump and related cooling components form the foundation of the 3412’s thermal management system. Diesel Pro Power supplies a complete catalog of Caterpillar 3412 marine cooling system parts, ensuring operators have everything required to maintain reliable performance and prevent costly downtime.

Marine Water Pump for Caterpillar 3412 Engines

The raw water pump is the heart of the Caterpillar 3412 cooling system. Its role is to draw seawater into the system and circulate it through the heat exchanger, aftercooler, and oil cooler. Without a properly functioning water pump, overheating can occur within minutes of operation, risking damage to pistons, liners, valves, and other vital engine components.

Key Features of the 3412 Marine Raw Water Pump

• High Flow Capacity – Engineered to meet the heavy cooling demand of the V12 configuration under continuous marine duty.

• Durable Construction – Designed with marine-grade materials to withstand saltwater exposure.

• 2” Flange Port Design – Ensures consistent, high-volume seawater flow.

• Compatibility – Fits Caterpillar 3408, 3412, 3412B, 3412C, and 3412D marine engines, offering flexibility across fleets.

Impellers for Caterpillar 3412 Marine Water Pumps

The impeller is the moving part inside the raw water pump that propels seawater through the system. Over time, impellers wear down due to friction, corrosion, and debris in the water. Routine replacement is essential for sustaining flow efficiency.

20-Blade Bronze Impeller

• Built with bronze for strength and anti-corrosion performance.

• 20 blades designed for balanced water distribution.

• Ideal for standard-duty applications in the Caterpillar 3412.

32-Blade Bronze Impeller

• Provides enhanced flow capacity for heavy-duty or high-load applications.

• Optimized design for maximum cooling efficiency.

• Extends service life of critical components by ensuring consistent engine temperature.

Expansion Tank Gasket Set for Caterpillar 3412

The expansion tank gasket ensures a tight seal within the cooling system. Over time, heat cycles cause gaskets to deteriorate, leading to coolant leaks and pressure loss.

• Precision-fit gasket set for Caterpillar 3408 and 3412 engines.

• Maintains system pressure and prevents coolant leakage.

• Designed for long service life under constant thermal stress.

Zinc Anodes for Caterpillar 3412 Cooling System

Zinc anodes are sacrificial components that protect the raw water pump and heat exchanger from galvanic corrosion caused by seawater. Regular replacement of zinc anodes is one of the most cost-effective ways to extend the lifespan of marine cooling systems.

Available Zinc Anode Options

• Small NPT 1/4” Anodes – Compact protection for auxiliary cooling circuits.

• Medium NPT 3/8” to 1/2” Anodes – Widely used sizes for Caterpillar 3412 pump housings.

• Large NPT 3/4” to 1-1/4” Anodes – Provide extended protection for larger seawater passages.

Each zinc anode is manufactured to withstand harsh marine environments and is easy to install or replace during routine maintenance.

Silicone Coolant Hoses for Caterpillar 3412

Coolant hoses connect the raw water pump to the engine’s heat exchangers, circulating seawater and coolant through the system. Diesel Pro Power supplies high-quality silicone coolant hoses, known for their durability, flexibility, and heat resistance.

• Available in a wide range of inside diameters: 1” to 4”.

• Resistant to cracking, hardening, and saltwater exposure.

• Each hose is sold by the foot for easy customization.

• Designed for high-pressure and high-temperature marine environments.

Hose Clamps for Caterpillar 3412 Cooling Systems

A reliable cooling system requires strong, leak-proof hose connections. Diesel Pro Power supplies stainless-steel hose clamps engineered to secure silicone hoses under high pressure.

• Sizes range from 9/16” to 2-1/2” effective diameter.

• Resistant to corrosion in saltwater applications.

• Precision-designed for a tight, lasting seal without cutting into hoses.

Why Diesel Pro Power for Caterpillar 3412 Cooling Parts

When it comes to sourcing parts for the Caterpillar 3412 cooling system, Diesel Pro Power stands out as the global leader:

• Trusted by 40,000+ Customers Worldwide – Including tugboat fleets, offshore operators, and commercial marine companies.

• Global Shipping to Over 180 Countries – Fast, trackable deliveries minimize costly downtime.

• Complete Cooling System Catalog – From raw water pumps and impellers to zinc anodes, hoses, and clamps, everything is in stock and ready to ship.

• Exclusive Focus on Marine & Industrial Engines – Unlike general suppliers, Diesel Pro Power specializes in Caterpillar engines like the 3412.

• Expert Technical Guidance – Support available to ensure correct part selection for your exact engine setup.