The thumb cylinder is a key component of an optional hydraulic thumb attachment on Caterpillar excavators. It is the actuator that enables the thumb to open and close, transforming a standard excavator bucket into a powerful gripping tool. This significantly expands the machine's functionality beyond basic digging.
This 378-5574 extension cylinder is used for cat machine.
Related Part Number:
379-7024
379-7025
379-7026
231-3538
421-4024
167-2200
8T-4958
2H-3931
4J-9224
379-7027
2F-5325
4T-8054
8C-3080
270-2649
3Y-9267
7J-6916
5D-6321
268-8864
5J-7876
5S-2457
3B-8489
379-7028
