[3] CRANE STOWING OPERATION
1. Completely retract the boom and slew until the boom is over the center of
the crane. Lower the boom to the maximum (it stops automatically).
2. With the boom stowing switch placed to the ON position, operate the boom
derricking lever again to the LOWER side to stow the boom.
3. Hold the hook block with one hand and turn the hook stowing switch to the
ON position to wind up the hook block.
４
. Leave the hook stowing switch in the ON position and fasten the hook of
the hook block to the hook holder.
5. Leave the hook stowing switch in the ON position yet and wind up the hook
block (10) to eliminate the wire rope slack.
6. When the hook block is secured, release the hook stowing switch soon so
that it returns to OFF position and winding up stop.
7. MOMENT LIMITER (OVERLOAD DETECTOR)
MOMENT LIMITER FUNCTIONS
[1] PROHIBITED ACTIONS AFTER AUTO STOP
The following crane operations are prohibited after the crane has stopped automatically due to overloading.
These operations may cause overturning of the machine or breakage of the boom and are very dangerous.
• Boom lowering operation • Boom extending operation • Hook raising operation
• Crane slewing operation
[2] OVERLOAD WARNING
1. PRE-WARNING:
“Actual load” is 90 to less than 100 % of the “rated total load”.
• The LED “70~100” on the moment limiter display lights up.
• The alarm bleeps intermittently.
• The working status lamp changes from green to yellow.
2. LIMIT WARNING:
“Actual load” is 100 % or higher than the “rated total load”.
• The LED “100~” on the moment limiter display lights up.
• The alarm sounds continuously.
• The working status lamp changes from yellow to red.
• The hazardous operation of the crane stops automatically.
(Hook raising, boom lowering, boom extending)
3. RECOVERY OPERATION AFTER AUTO STOP
If the system stops automatically, promptly perform one of following the recovery operation caused by overloading.
(1) Hook lowering operation
(2) Boom raising operation (never raise the boom to lift the load from the ground, always winch the load clear of the
ground before any other operation is performed)
(3) Boom retracting operation
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