Caterpillar Cab Heater Actuator Valve 546-5540 is a heater core product that transfers engine-coolant heat into cab airflow. It is listed for Caterpillar heavy-equipment applications; use part number 546-5540 as the primary identification reference.
- Part Number: 546-5540
- Brand: Caterpillar
- Product Category: Heater Core
- Equipment Type: Mini Excavator
- Compatible Models: 306.5, 308, 307.5, 309, 306, 310
- 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.





