Oil Cooler Core 7S-6395 Fits for Caterpillar 3306 3304 Engine 930 950 966 955K 977K D6C D5 D7F
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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.
Description
Description
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.
1 Year Warranty
1 Year Warranty
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.
Fast Delivery
Fast Delivery
Estimated delivery time 3-6 workdays
No Core Charge
No Core Charge
We don't have a core charge for any products.
Frequently Asked Questions
Shipping and Delivery
What countries do you ship to?
What countries do you ship to?
We can ship to these countries:
Indonesia, Japan, Malaysia, Philippines, Singapore, South Korea, Thailand, Vietnam
United States
Belgium, San Marino, Italy, Spain, Netherlands, France, Germany, Finland, Austria, Denmark, Ireland, Luxembourg, Monaco, Norway, Sweden, Switzerland, Portugal, Poland, Hungary, Canada, Estonia, Australia, Mexico, New Zealand, Bulgaria, Croatia, Cyprus, Czechia, Greece, Greenland, Iceland, Liechtenstein, Lithuania, Malta, Romania, Russia, Slovakia, Slovenia, Latvia, Turkey, United Kingdom
How long will it take to receive my order?
How long will it take to receive my order?
Estimated delivery time to USA: 3-6 workdays;
Estimated delivery time to Canada, Mexico: 4-7 workdays;
Estimated delivery time to Australia: 4-7 workdays;
Estimated delivery time to European countries: 4-7 workdays;
Estimated delivery time to Asian countries: 3-5 workdays.
Returns and Refunds
How do I return a product?
How do I return a product?
Our return policy lasts 60 days. If 60 days have gone by since the delivery, unfortunately, we can’t offer you a refund or exchange.
To be eligible for a return, your item must be unused, not installed, clean and in the same condition that you received it. Shrink wrapping must not be broken. It must also be in the original packaging.
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
Steps of Returning Products to Fab Heavy Parts
1. Request returns in seconds at our return portal.
2. Fill in the email address you left with the order & the order number to start the return. Note: a correct order number format starts with a # hashtag
3. Select the items you wish to return and choose the return reason and upload photos of the received package.
Then, Fab Heavy Parts receives your return request and starts to process your return request. We may contact you for more details.
Steps after the approval of your return request:
1. A Return label will be sent to you via email. Print out the return label, place it on the parcel, and take it to the drop-off point. Make sure you properly pack the product for return if it’s returnable.
2. A refund of the original purchase price will be issued.
Any questions about returning products, please feel free to contact us at info@fabheavy.com
How long will it take to receive my refund?
How long will it take to receive my refund?
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment within 3-10 business days.
Payment Methods
What kind of payment methods do you accept?
What kind of payment methods do you accept?
We accept all major credit cards, PayPal, Google Pay, Apply Pay, Shop Pay, debit cards.
If you prefer offline payment, please contact us to get our bank transfer details.
Taxes or duties
Will I receive customs/import duties?
Will I receive customs/import duties?
For orders shipping to the United States, our price includes the import fees. The receiver/buyer doesn't need to pay any extra customs taxes, or duties for their packages. For orders shipping to non-US countries, please check our policy here.
