6.1 CAUTIONS FOR FLY-JIB OPERATION
• Whenever the Fly-jib is installed, always keep the engine speed in low idling so that the machine is
operated in low speed. Sudden lever operation may produce excessive load to the Fly-jib which may
cause Fly-jib breakage resulting in a serious accident.
• At a Fly-jib angle in 0 or 20 degrees, perform the crane operation in the boom angle range of “45
degrees” or more. When a load is hoisted in a condition that the boom angle is less than “45 degrees”
and the boom length is “5.3 m” or longer, the moment limiter emits a warning signal, the buzzer sounds
intermittently, and hook hoisting, boom telescoping and boom lowering operations automatically stop.
However, when the boom length is less than “5.3 m”, the moment limiter does not emit a warning signal.
In a condition where the boom angle is less than “45 degrees”, boom lowering operation is not available
unless the boom length is less than “5.3 m”.
• At a Fly-jib angle in 40 or 60 degrees, perform the crane operation in the boom angle range of “65
degrees” or more. When a load is hoisted in a condition that the boom angle is less than “65 degrees”
and the boom length is “5.3 m” or longer, the moment limiter emits a warning signal, the buzzer sounds
intermittently, and hook hoisting, boom telescoping and boom lowering operations automatically stop.
However, when the boom length is less than “5.3 m”, the moment limiter does not emit a warning signal.
In a condition where the boom angle is less than “65 degrees”, boom lowering operation is not available
unless the boom length is less than “5.3 m”.
• Travelling is prohibited when the Fly-jib is installed.
However, travelling is allowed if the boom length is 5.3 m or less and actual load is 0.2 tons or less.
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