Replacement Oil Cooler for Caterpillar ® CAT General Use Applications 3400 Cross Reference OEM Cross References: 7C3039 Superseded/Alternate Numbers: M-0R5601, M-2W1008, M-2Y8928, M-4N619, M-6N169, M-6N8856, M-7W2164

What’s Included

Oil Cooler for Caterpillar 3406 / C Series Engines – Part# 7C3039

High-quality Oil Cooler designed for Caterpillar 3406, C15, and C16 diesel engines. Engineered as a direct-fit replacement for OEM part number 7C3039, this oil cooler maintains proper engine oil temperature, helping to prevent overheating and extend component life in heavy-duty applications.

Built to match or exceed original specifications, this engine oil cooler features high-efficiency cooling fins and a durable core that withstands extreme working conditions. Whether you’re performing a full engine rebuild or routine maintenance, this cooler is a critical component to keep your CAT engine running strong under load.

Key Features:

• Direct Replacement for Caterpillar OE#0R5511, 0R5601, 0R9056, 133-0125, 1330125, 299-1996, 2991996, 2W1008, 2Y8928, 4N0619, 4W6039, 6N0169, 6N8856, 7C3039, 7W2164

• Compatible with Caterpillar 3406, 3406B, 3406C, 3406E, C15, and C16 engines

• Heavy-duty construction ensures efficient heat transfer and extended service life

• Corrosion-resistant materials for long-term reliability

• Helps maintain optimal oil viscosity and reduce wear on internal components

Fitment & Compatibility:

• Caterpillar 3406 Series (All Variants)

• CAT 3406B / 3406C / 3406E

• CAT C15 & CAT C16 Diesel Engines

• Perfect for on-highway trucks, industrial, marine, and construction applications

Cross Reference Part Numbers:

• CAT 7C3039, 0R5511, 0R5601, 0R9056, 133-0125, 1330125, 299-1996, 2991996, 2W1008, 2Y8928, 4N0619, 4W6039, 6N0169, 6N8856, 7C3039, 7W2164

• Also compatible with select aftermarket and OEM rebuild kits

Why Replace Your Oil Cooler?

Over time, oil coolers can become clogged or corroded, restricting flow and reducing heat exchange efficiency. A failing cooler can cause elevated oil temperatures, leading to engine wear or failure. Replacing it with a durable, high-performance aftermarket cooler ensures your engine operates at peak efficiency and remains protected under heavy workloads.

Application & Fitment

• Engine Make: Caterpillar

Confirm the original part number and engine identification before ordering. Where applicable, also verify serial-number range, production year, piston style, bearing size or other configuration notes shown in the product information.

Part Numbers & Cross References

• OEM Cross Reference: 7C3039
• Alternate / Superseded: M-0R5601, M-2W1008, M-2Y8928, M-4N619, M-6N169, M-6N8856, M-7W2164
• Interstate-McBee Reference: M-7C3039

Need Help Confirming Fitment?

Use the engine model, serial number and original part number when checking compatibility. For kits and sets, review the complete component breakdown above before ordering because contents can vary by engine configuration.