Re: Barge-Mounted Clamshell Crane
The power tagline on a clamshell is also used for the dipper trip when the machine is set up as a shovel. It usually runs off the end of one of the drum shafts and has a clutch that is set to drag a little bit to keep a constant pull. When you want to trip the dipper or pull on the clam you fully engage the clutch.
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