Oil Cooler Core 7S-6395 Fits for Caterpillar 3306 3304 Engine 930 950 966 955K 977K D6C D5 D7F

Oil Cooler Core 7S-6395 – Replacement for Caterpillar 3306 3304 Engine 930 950 966 955K 977K D6C D5 D7F

Aftermarket oil cooler core engineered for reliable oil temperature regulation and consistent lubrication system performance in Caterpillar 3304 and 3306 diesel engine applications. Precision-manufactured components ensure drop-in compatibility with correct fitment.

Technical Specifications

• Part Numbers: 7S-6395, CA7S6395, 7S6395, 0R-3499, 0R3499, CA0R3499
• Condition: New, aftermarket replacement
• Function: Transfers heat from engine oil to the coolant circuit to maintain oil temperature within the optimal operating range, protecting bearings, journals, and all lubricated components from thermal degradation across Caterpillar 3304 and 3306 engine applications

Equipment Compatibility

Note: Compatibility is provided for reference. Please verify against your part number before ordering.

Fits the Following Applications:

• Caterpillar Engine: 3304, 3306
• Caterpillar Loader: 920, 930, 950, 951C, 955K, 955L, 966, 966C, 977K, 977L
• Caterpillar Track Type Tractor: D5, D6C, D7F

Why Choose This Oil Cooler Core

The oil cooler core is a critical thermal management component in your Caterpillar diesel engine — it keeps engine oil temperatures within the safe operating range to maintain oil viscosity, film strength, and lubrication effectiveness under sustained heavy loads. A clogged, cracked, or leaking oil cooler core results in overheated oil, accelerated bearing wear, and the risk of catastrophic engine failure in loader and dozer applications where continuous high-load operation is the norm. This replacement unit delivers:

• Reliable oil temperature regulation – Engineered to meet the heat transfer capacity and flow specifications of Caterpillar 3304 and 3306 engine oil cooling systems
• Exact-fit installation – Direct replacement with correct core dimensions, port configuration, and mounting interface to match Caterpillar engine specifications without modification
• Durable construction – Built to withstand continuous thermal cycling, high oil pressure, and the demanding duty requirements of Caterpillar loader and track-type tractor engine operation in construction and earthmoving environments
• Cost-effective solution – Aftermarket quality at a fraction of dealer pricing

Package Contents

• 1 × Oil Cooler Core 7S-6395

Essential for Caterpillar 3304 and 3306 engine oil cooling system maintenance and cooler core replacement across 930, 950, 966, 955K, 977K loader, D5, D6C, and D7F track-type tractor applications. Keep your Caterpillar engine delivering reliable oil temperatures and full protection on every operation.