Caterpillar Engine Coolant Heater Wiring Harness 321-6069 is a engine block heater product that supports cold-weather engine starting by warming coolant or the engine block. It is listed for Caterpillar heavy-equipment applications; use part number 321-6069 as the primary identification reference.
- Part Number: 321-6069
- Brand: Caterpillar
- Product Category: Engine Block Heater
- Equipment Type: Mini Excavator, Wheel Loader
- Compatible Models: 306.5, 308.5, 308, 307.5, 309, 306, 303.5C, 307D, 305C CR, 303.5E, 305.5D, 303.5D, 305.5E, 305E, 307E, 304C CR, 303C CR, 308E, 308D, 305D CR, 304E, 306E, 308E2, 304D CR, 307E2, 308E2 CR, 310, 903D, 903C2
- 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.





