Parts for Caterpillar 3406 Marine Diesel Engines

Diesel Pro Advantages: Why Buy Caterpillar 3406 Marine Diesel Engine Parts From Us

At Diesel Pro Power, we understand that boat owners need reliable replacement parts for their vessels, and they often need them right away. That's why we offer Caterpillar 3406 engine components crafted to the original manufacturer’s specs and designed with a long-lasting life span in mind. Don't settle for a company that doesn’t have a full stock of Caterpillar 3406 marine diesel engine parts. Instead, get your hands on genuine quality at our expansive inventory packed full of top-tier options. Trust us when it comes time to find dependable spare parts. You’ll be able to enjoy an uncompromised performance from your machine while maintaining maximum value out of every purchase.

Upgrade your boating experience with Diesel Pro Power. Not only do we offer an extensive selection of high-quality replacement engine parts from Caterpillar, but we stock parts from other major players in the game, such as Cummins and Detroit Diesel. Enjoy a hassle-free online shopping journey complete with unbeatable customer service. And, on top of that, all of our orders are shipped to you within 24 hours too. Get back out on the water in no time at all with everything that's needed to keep your vessel running smoothly.

Our Impressive Inventory of Caterpillar 3406 Marine Diesel Parts

No matter what you need for your Caterpillar 3406 marine diesel engine, our parts catalog has got it. Our warehouse is always fully stocked with just about everything you will ever need for your 3506, 3406B or 3406E. Whether you want to replace an old, worn-down part or are stocking up on spares in case of emergency, we've got everything covered. Don't wait forever to get the right part. Check out our massive inventory today to see how we can help.

Why spend your precious time driving from store to store when Diesel Pro Power provides everything you need for Caterpillar 3406 engines? Our fully stocked warehouse carries a vast selection of parts, such as engine overhaul kits, mechanical and electrical gauges, water pumps (both fresh-water & marine), cylinder heads and injectors. There's no more searching around. All you have to do now is look at our huge range of 3406 Caterpillar Marine Engine Parts today.

Unparalleled Customer Service

Don't let your boating plans come to a grinding halt because you can't find the right Caterpillar 3406 marine parts. At Diesel Pro Power, we have unbeatable customer service and an overflowing warehouse of hard-to-find, in-stock parts. There’s no need for running around town. Here, we work to make your boat dreams a reality sooner than expected. It’s easy to see why too. Our 24-hour shipping and service right to your door mean you can receive your Caterpillar 3406 marine part quickly and without unnecessary delays.

Our comprehensive online platform is dedicated to simplifying the process of finding Caterpillar 3406 marine parts, no matter where you are. With our helpful customer service team available by phone and WhatsApp message, email or website comment—we're committed to ensuring your engine always runs at optimum performance with ease. All you have to do is give us a quick call or send us a message, and we can walk you through the process and help you find the right part for your Caterpillar engine.

On-Time Delivery of Caterpillar 3406 Engine Parts

At Diesel Pro Power, your shopping experience for Caterpillar 3406 engine parts will be simple and stress-free. Our website offers a user-friendly platform to navigate and make purchases with flexible payment options that include credit card or wire transfer in US Dollars. Moreover, our helpful customer service team is available by phone if you need product information or assistance with orders. To top it off, our stock is warranted for up to six months, so quality is guaranteed. This means you can buy any of our products without worrying about whether or not they work. This is a huge advantage, as you can buy your Caterpillar 3406 engine parts with complete confidence.

Shopping for motor parts with Diesel Pro Power is simple and cost-effective. With our pre-payment of import taxes at checkout, you know exactly how much money needs to be spent up front—eliminating any surprises when receiving your Caterpillar 3406 engine parts. Plus, the helpful team here is on hand throughout every step of the journey, ready to help make it as seamless an experience as possible. Don’t hesitate to call us if you want any help during the process. Our well-trained customer service representatives will be able to help you choose the correct Caterpillar 3406 marine engine parts for your unique situation.

Engine Specifications & Applications of the Caterpillar 3406, 3406B, 3406C, and 3406E Engines

Overview of the Caterpillar 3406 Engine Series

The Caterpillar 3406 engine family—comprising the 3406, 3406B, 3406C, and 3406E models—is one of the most iconic and long-standing engine lines in Caterpillar’s history. Introduced in the 1970s and produced well into the 2000s, the 3406 platform became renowned for its reliability, strong low-end torque, and versatility in a wide range of industrial and marine applications.

These 14.6-liter inline six-cylinder diesel engines were built for heavy-duty service and are known for delivering 350 to 600+ horsepower, depending on the variant and configuration. Although initially favored for on-highway trucking, they were equally effective in marine propulsion, generator sets, construction machinery, and oilfield equipment.

Each generation of the 3406 brought improvements:

The original 3406 featured mechanical controls.
The 3406B introduced significant durability upgrades.
The 3406C refined cooling and fuel systems.
The 3406E adopted electronic control with Caterpillar's ADEM system.

Today, all four models are widely used and fully supported in the aftermarket, with robust parts availability and rebuild options—especially from Diesel Pro Power.

Caterpillar 3406 Series Engine Technical Specifications

Model	Aspiration	Fuel System	Horsepower Range	Common Applications
3406	Turbocharged (some NA)	Mechanical Injection	250–400 HP	Marine, Gen Sets, Construction
3406B	Turbocharged & Aftercooled	Mechanical Injection	300–450 HP	Marine, Mining, Oilfield, Industrial
3406C	Turbo Aftercooled (TA)	Mechanical Injection	350–550 HP	Marine, Power Gen, Excavators, Loaders
3406E	Turbo Aftercooled (TA)	Electronic (ADEM II/III)	400–600+ HP	Marine, Oilfield, Industrial Generators

Core Specifications (Applicable to All 3406 Models)

Attribute	Specification
Configuration	Inline 6-cylinder, 4-stroke diesel
Displacement	14.6 Liters (893 cubic inches)
Bore x Stroke	5.40 in x 6.50 in (137 mm x 165 mm)
Compression Ratio	14.5:1 to 16:1 (depending on version)
Cooling System	Water-cooled
Weight (Dry)	2,800–3,200 lbs
Emissions Compliance	Pre-Tier 1 to Tier 1 (3406E)
Fuel Control System	Mechanical (3406–C), Electronic (3406E)

Applications of the Caterpillar 3406 Engine Series

The 3406 engine family was designed for extreme durability under load, which made it a favorite across marine, industrial, power generation, construction, and energy sectors. Each variant carved out its niche in different operational settings.

1. Marine Propulsion and Auxiliary Power

The Caterpillar 3406, 3406B, 3406C, and 3406E are all widely used in marine diesel engines, powering vessels around the world.

Common Marine Uses:

Commercial fishing boats
Tugboats and pilot vessels
Crew and supply boats
Luxury yachts and trawlers
Marine generators (auxiliary power)

The 3406B and 3406C are especially popular in marine repower projects due to their balance of power and mechanical simplicity, while the 3406E is favored in modern refits for its ADEM-compatible diagnostics.

Diesel Pro Power supports marine applications with raw water pumps, thermostats, heat exchangers, marine turbochargers, exhaust elbows, and more.

2. Construction & Heavy Equipment

Caterpillar integrated the 3406 across a range of large construction and earthmoving machines, where high torque and consistent load performance were essential.

Equipment Powered by the 3406 Series:

CAT 769, 773, and 775 off-highway trucks
CAT 988B/C wheel loaders
CAT D8K and D9R bulldozers
Scrapers and haul trucks
Large hydraulic excavators

Diesel Pro Power stocks overhaul kits, fuel pumps, turbos, and sensors to support operators maintaining 3406-powered heavy equipment.

3. Industrial & Oilfield Applications

The 3406 platform is widely used in industrial stationary equipment, especially in rugged environments like oilfields, mining operations, and pipeline stations.

Typical Installations:

Oil drilling mud pumps
Hydraulic fracturing (frac) pumps
Water injection systems
Rock crushers and screeners
Air compressors and water pumps

The 3406B and 3406C are particularly valued for their reliability under constant heavy-duty cycles. Diesel Pro Power offers camshafts, governor parts, injectors, and oil system components for industrial engines.

4. Generator Sets & Prime Power Units

With output ratings up to 400+ kW, the 3406 engine family is well-suited for generator sets used in both prime and standby power scenarios.

Applications:

Commercial backup generators
Remote site prime power units
Mining camp and offshore platform power
Portable gen sets for rental fleets

Marine and land-based generators equipped with the 3406 benefit from parts availability across all major rebuild components—available through Diesel Pro Power.

Additional Resources

Marine CAT 3406 Component Maintenance Life

The Legacy of the Caterpillar Marine 3406 Engine: A Retrospective

Everything You Need to Know About the Caterpillar 3406 Marine Engine

Everything You Need To Know About The Caterpillar 3406E Engine

Everything You Need to Know About the Caterpillar 3406E Engine

Caterpillar 3400 Series Parts - Aftermarket