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Oil Cooler Core 7S-6395 Fits for Caterpillar 3306 3304 Engine 930 950 966 955K 977K D6C D5 D7F is backordered and will ship as soon as it is back in stock.
Powering 10,000+ Commercial Fleets
One Year Warranty
Easy 60-day Return
Expert support & Fitment Guarantee
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.
Note: Compatibility is provided for reference. Please verify against your part number before ordering.
Fits the Following Applications:
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:
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.
Fab Heavy Parts is excited to offer a 12-month warranty on all new replacement/aftermarket parts starting from your original purchase date.
Enjoy peace of mind with Fab Heavy Parts!
For more warranty details, please check out our warranty policy.
Estimated delivery time 3-6 workdays
We don't have a core charge for any products.
To start a return, please use our return portal. Items should be unused, not installed, clean, in their original packaging and accompanied by proof of purchase. Please contact support if you need help with the current return instructions or applicable costs.
Orders placed within one hour and not yet fulfilled can be cancelled from the customer order page. After one hour, or once the order has been fulfilled, please contact support for the next steps.
Available payment methods include major credit and debit cards, PayPal, Apple Pay, Google Pay, Shop Pay and Klarna. Availability can vary by order and checkout, so the payment options shown at checkout apply.
Most packages delivered within New Zealand arrive in 4–7 working days. Packages over 68 kg can take 5–10 working days. Timing can also vary with product availability, destination, shipping service, customs processing, weekends, public holidays or carrier delays.
New Zealand orders are billed in NZD.
Compare the listed part number, machine make, model, engine details and specifications with your equipment records. Fitment can vary by configuration and serial range, so contact support with the part number and machine details if you are unsure. Fitment should be confirmed before installation.
Mailed & Couriered Shipments (Online Shopping)
For NZ$1,000 or less goods value, no customs duty or border entry fees are collected by the New Zealand Customs Service.
For over NZ$1,000 customs value, formal customs entry is required and the customer must pay 15% GST, applicable customs duties, and border processing fees such as the Import Entry Transaction Fee.
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.
Note: Compatibility is provided for reference. Please verify against your part number before ordering.
Fits the Following Applications:
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:
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.
