3912146CN Aftermarket Cummins/Caterpillar ZF Transmission Gear Oil Cooler 113-1113, 3 x 9 in | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Transmission Gear-Oil Cooler - Replaces Part Number: 3912146CN

New high-pressure copper-nickel gear-oil cooler replacing Cummins 3912146 and Caterpillar 113-1113/164-5583. The approximately 3-inch × 9-inch bundle is used with specified ZF marine transmissions.

⚙️ Key Features

• Replaces Cummins 3912146

• Cross-references Caterpillar 113-1113 and 164-5583

• Approximately 3-inch shell × 9-inch bundle, 13.5-inch overall

• Approximately 1.75-inch water and 1/2-inch NPT oil connections

• Approximately 475psi oil-side rating with zinc/drain protection

🧰 Kit / Assembly Contents

• 1 × Complete transmission-oil cooler - P/N 3912146CN

• 1 × integrated copper-nickel tube bundle

• 2 × sacrificial-zinc/drain positions according to manufacturer configuration

• Oil fittings and mounting hardware are renewed separately

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 3912146CN → Copper-nickel replacement for Cummins 3912146

• 113-1113 / 164-5583 (Caterpillar cross-references)

• Sendure 9660-1-07 (aftermarket/OE-supply reference)

OEM / Related Numbers:

• 113-1113

• 164-5583

• 9660-1-07

Aftermarket / Verified Equivalents:

• Sendure: 9660-1-07

• Mr Cool: MRC3912146CN

• Lenco: LE3912146

🚤 Compatibility

Commonly used on:

• Cummins and Caterpillar marine engines with ZF reduction gears

Typically suits:

• Engine / Equipment models:

• Cummins 6CTA 8.3 400, 420, 430 and 450 Diamond installations

• Caterpillar 3126 installations specifying 113-1113/164-5583

• ZF220, ZF260 and ZF280 marine transmissions using this cooler configuration

• Output / Engine Rating: Approximately 300HP - 450HP on common applications

• Engine / System Type: Marine diesel propulsion engine with ZF hydraulic reduction gear

• Year Range: Engine-, gear- and serial-dependent

• Serial / Model Identification: Confirm oil pressure rating, water-hose size and ZF transmission model.

🔌 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