replacement main & relief valve, part number 330-3979, for CAT excavator and compatible heavy-equipment applications.
- Primary part number: 330-3979
- Alternative part numbers: None listed
- Compatible brands: CAT
- Equipment type: Engine, Loader
- Application reference: Caterpillar CAT Engine C4.4 3054C Loader 416E 416F 420E 420F 422E 422F 428E 428F 430E 430F 432E 432F 434E 434F 442E 444E 444F 450E 450F
- Engine models: C4.4 3054C
- Condition: replacement
Please verify the primary/alternative part number, connector, dimensions, machine model and engine serial number before ordering.





