The bucket cylinder operates as part of a sophisticated mechanical linkage (the lever system of the boom, stick, and bucket) and a high-pressure hydraulic circuit. Its operation is as follows:
Hydraulic Pressure Input: The machine's main hydraulic pump generates high-pressure oil. This oil is directed to the barrel end (piston side) or rod end of the bucket cylinder by the operator's commands via the hydraulic control valve.
Cylinder Extension (Curl / Digging):
To curl the bucket into the bank for digging, high-pressure oil is sent to the barrel end (piston side) of the cylinder.
The pressure acts on the large surface area of the piston, creating an immense linear force that pushes the piston rod outward.
As the rod extends, it pushes against the bucket linkage, forcing the bucket to rotate towards the machine, penetrating the material and filling the bucket.
This 105-7485 bucket cylinder is used 5090B front shovel.
FRONT SHOVEL
5080 385C
EXCAVATOR
385C FS
Related Part Number:
5I-8589
7Y-4956
8M-4228
8T-1789
105-7486
9T-8511
121-1600
121-1601
121-1602
121-1603
121-1604
121-1606
379-7892
6E-0787
379-7893
121-1607
5P-8250
8J-1665
8J-1666
8T-8380
9F-6936
121-1605
