Primary Boom actuation: Its core function is to generate the immense force required to lift and lower the entire boom structure. This includes the weight of the boom itself, the stick (arm), the bucket, and the heavy load of material within the bucket.
Generating Breakout Force: Breakout force is the power needed to dig into, pry, and "break out" dense, compacted material from a bank or pile. The boom cylinder is the primary source of this force. By extending with extreme pressure, it drives the bucket down and into the material, initiating the digging cycle.
Controlling Boom Descent: The cylinder doesn't just lift; it also provides precise control when lowering the boom. Internal cushions and the machine's hydraulic control valves manage the flow of hydraulic fluid out of the cylinder, preventing a sudden, gravity-driven drop and ensuring smooth, safe, and controlled movement.
This 491-4653 boom cylinder is used for 385C FS 5080 5090B front shovel.
FRONT SHOVEL
5090B 385C
EXCAVATOR
385C FS
Related Part Number:
7Y-5239
9X-3610
087-5385
087-5391
087-5393
087-5395
087-5397
095-1728
114-0763
143-8137
143-8138
147-5787
165-9293
170-9850
188-4082
172-2997
216-0008
491-4654
6E-0787
215-9996
