grapple yarding 4

You are correct, there are three drums. When I was explaning how a yarder works I went really simple. There are two mainline drums. They can be called mainline and slack puller, or closing and opening lines, there are a few other names. For simplicity lets just stick with mainline and slackpuller. Then there is the haulback drum. The haulback goes from the machine to the backend of the setting, around the haulback bl

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