1.5 OVER HOIST DETECTOR CAUTION Pay attention to the distance between the hook block and the boom when raising the hook block. The hook block also raises when the boom is extended. Always check the height of the hook block when performing the boom extending operation.
(1) Hook block (2) Over hoist detector weight (3) Over hoist detector (4) Boom
The over hoist detector is a device which automatically stops operation as listed below, it also sounds the Over hoist and moment limiter alarm buzzer (5) to warn of an over hoisting condition, when the hook block (1) comes close to the Boom tip and lifts the weight (2) up: • Hook raising • Boom telescoping • Boom raising When the Over hoist and moment limiter alarm buzzer (5) beeps, return all of the Winch lever, Boom telescoping lever and Boom derricking lever to the NEUTRAL position immediately, then push the Winch lever forward (Down).
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