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W450321A 09/12
6.1 Reeling Drum Overview
The primary operation of the Reeling Drum is to measure the extension of the telescoping sections of
the main boom. The Reeling Drum also includes an angle sensor to measure the main boom angle,
and an electrical slip-ring which transfers the Two-Block signal from the Reeling Drum cable to the
system computer. It is important the setup and maintenance of these devices is properly carried out per
the procedures in this manual. Incorrect maintenance can result in system calculation errors.
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