Actuating the Thumb (Clamping): This is its core function. The cylinder extends to close the hydraulic thumb against the excavator's main bucket, creating a gripping action. This allows the machine to pick up, hold, and manipulate irregularly shaped objects like rocks, logs, concrete debris, and scrap metal.
Releasing the Load (Opening): The cylinder retracts to open the thumb, releasing the gripped material in a controlled manner. This allows for precise placement of objects.
This 146-4141 extension cylinder is used 336D 330D 330C excavator.
Related Part Number:
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