JPR-CT3406 Aftermarket Caterpillar 3406 Seawater Pump 5N4852, 3N4851, 3N4852, Jabsco 17970-0000 | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement 3406 Seawater Pump - Part Number: JPR-CT3406

New aftermarket engine-cooling seawater pump for Caterpillar 3406 marine engines, Caterpillar 3406 arrangements using the 3N4851/3N4852/5N4852 pump family. It replaces the listed OEM pump family and is supplied as a complete assembled pump. Verify the drive gear and cover orientation before installation.

⚙️ Key Features

• Direct aftermarket replacement for JPR-CT3406

• Heavy-duty marine-grade bronze or corrosion-resistant pump construction

• Gear-driven pump with engine mounting flange

• Port configuration: Large marine engine pump ports

• Serviceable flexible-impeller design with replaceable cover, cam, seal, shaft and bearings

🧰 Kit / Assembly Contents

• 1 × Complete seawater pump assembly - Part Number: JPR-CT3406

• 1 × Installed impeller - JMP 8300-series flexible impeller

• 1 × Installed shaft, bearing, cam and mechanical-seal assembly

• 1 × Installed end cover with gasket or O-ring sealing system

• Mounting / installation: Pump-to-engine gasket/O-ring serviced separately unless supplied

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• JPR-CT3406 → Replaces / cross-references 3N4851

• JPR-CT3406 → Replaces / cross-references 3N4852

• JPR-CT3406 → Replaces / cross-references 5N4852

OEM / Related Numbers:

• 3N4851

• 3N4852

• 5N4852

Aftermarket / Verified Equivalents:

• Jabsco: 17970-0000

• Jabsco: 17970-0100

• JMP Marine: JPR-CT3406

Service Parts / Kits:

• Minor service kit: JMP JSM0005 family

🚤 Compatibility

Commonly used on:

• JMP Marine / Caterpillar marine engine-cooling systems

Typically suits:

• Engine models:

• Caterpillar 3406 marine engines

• Caterpillar 3406 arrangements using the 3N4851/3N4852/5N4852 pump family

• HP / Output Range: Engine- or generator-rating dependent

• Engine Type: Marine diesel, petrol or generator engine as listed above

• Year Range: Engine-model, arrangement and serial-number dependent

• Port / Drive Identification: Large marine engine pump ports; Gear-driven pump with engine mounting flange. Confirm rotation, shaft/gear style, flange, port direction and mounting seal before ordering.

🔌 Function

The engine-driven flexible-impeller seawater pump draws raw water through the vessel's intake and strainer, then circulates it through the heat exchanger, charge-air cooler, exhaust mixer and other seawater-cooled components. Adequate flow is essential for controlling engine and exhaust temperatures.

Common signs of failure:

• Engine or exhaust temperature rises above normal

• Weak or absent seawater discharge at the exhaust outlet

• Impeller blades are cracked, missing, swollen or permanently set

• Water leaks from the pump cover, shaft seal, drain hole or mounting flange

• Bearing noise, shaft play or a seized pump drive

📦 Condition

• New aftermarket replacement seawater pump

• Brand new

• Supplied in original or equivalent packaging