Caterpillar 1116.5 mm Length Oil Cooler core (Oil – to – Air) 334-3321 is a hydraulic oil cooler product that removes excess heat from the hydraulic-oil circuit. It is listed for Caterpillar heavy-equipment applications; use part number 334-3321 as the primary identification reference.
- Part Number: 334-3321
- Brand: Caterpillar
- Product Category: Hydraulic Oil Cooler
- Equipment Type: Bulldozer, Pipelayer
- Compatible Models: D9T, D8T, PL83, PL87
- Engine Models: Confirm by equipment serial number
- Condition: New
Fitment can vary by machine configuration and serial-number range. Compare the original part number, dimensions, connectors and mounting points before purchase.





