Hydraulic Oil Cooler Description
This Hydraulic Oil Cooler is indexed for Caterpillar Caterpillar Excavator CAT 320. Compare reference number 3066 against the label on your existing Caterpillar component before ordering.
Before checkout, compare OEM part number 3066, connector layout, mounting position, and machine serial number. For high-value or fitment-sensitive parts, submit the fitment form below so support can verify the match.




