4003582CN Aftermarket Cummins QSM11 ZF Transmission Oil Cooler | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Transmission Gear-Oil Cooler - Replaces Part Number: 4003582CN

New copper-nickel transmission-oil cooler replacing Cummins 4003582 and 5270990. The approximately 4-inch × 12-inch assembly is used on QSC8.3 and QSM11 installations with specified ZF gearboxes.

⚙️ Key Features

• Replaces Cummins 4003582 and 5270990

• Approximately 4-inch diameter × 12-inch overall length

• Approximately 2-inch seawater connection

• Approximately 1/2-inch NPT oil connections

• One-side O-ring connection configuration where specified

🧰 Kit / Assembly Contents

• 1 × Complete transmission-oil cooler - P/N 4003582CN

• 1 × integrated copper-nickel tube bundle

• Oil fittings, O-ring, water hoses and mounting hardware are renewed separately

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 5270990 → Later service reference associated with 4003582

OEM / Related Numbers:

• 5270990

• 4003582

Aftermarket / Verified Equivalents:

• Mr Cool: MRC4003582CN

• Seakamp: 4003582CN

• Lenco: LE4003582

🚤 Compatibility

Commonly used on:

• Cummins marine engines with ZF reduction gears

Typically suits:

• Engine / Equipment models:

• QSC8.3 marine installations specifying 4003582/5270990

• QSM11 marine installations specifying 4003582/5270990

• Output / Engine Rating: Approximately 500HP - 715HP on common applications

• Engine / System Type: Inline six-cylinder turbocharged marine diesel with ZF hydraulic transmission

• Year Range: QSC8.3/QSM11 production; serial-dependent

• Serial / Model Identification: Confirm transmission model, O-ring-end orientation and oil-port size.

🔌 Function

The cooler transfers heat from transmission or reduction-gear oil into the raw-water circuit. Correct oil temperature protects clutches, bearings, seals and hydraulic control components.

Common signs of failure:

• High transmission or reduction-gear oil temperature

• Burnt, darkened or aerated gear oil

• Delayed engagement, slipping or abnormal gear noise when hot

• Water-contaminated or milky transmission oil

• External oil leakage, corrosion or failed pressure test

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging