Maeda CC1485S-1 - Page 360

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[3] CHECKING MOMENT LIMITER FOR OPERATION
If you find any abnormality with the moment limiter, immediately contact us or our sales service
agency.
1. Turn the starter switch to the ON position.
2. Check the working status lamp. All 3 colors light first, then only the green light remains lit.
3. Check that error codes are not displayed on the monitor display.
4. Set the Fly-jib as follows and check if the monitor display at this time is correct.
Crane Operation and Displayed Parameter
Monitor display
“Number of stages of Fly-jib” indication when the number of stages of the
Fly-jib is set to one stage
1
“Number of stages of Fly-jib” indication when the number of stages of the
Fly-jib is set to two stages
2
“Fly-jib angle display” indication, when the Fly-jib tilt angle is set to 0 0
“Fly-jib angle display” indication, when the Fly-jib tilt angle is set to 20 20
“Fly-jib angle display” indication, when the Fly-jib tilt angle is set to 40 40
“Fly-jib angle display” indication, when the Fly-jib tilt angle is set to 60 60
5. Start the engine and operate the crane as follows to verify if the moment limiter is acting properly for
each function.
Crane operation
Action of
Moment Limiter
When the Fly-jib angle is 0 or 20 degrees, the boom angle
is lowered to 45 degrees or less and the boom is
extended to 5.3 m or more.
• An over-load warning is emitted and the
buzzer sounds intermittently.
• The hook hoisting, boom telescoping and
boom lowering operation automatically
stop.
When the Fly-jib angle is 0 or 20 degrees, the boom angle
is lowered to 45 degrees or less but the boom is extended
to less than 5.3 m.
• The boom lowering operation is
available.
When the Fly-jib angle is 40 or 60 degrees, the boom
angle is lowered to 65 degrees or less and the boom is
extended to 5.3 m or more
• An over-load warning is emitted and the
buzzer sounds intermittently.
• The hook hoisting, boom telescoping and
boom lowering operation automatically
stop.
When the Fly-jib angle is 40 or 60 degrees, the boom
angle is lowered to 65 degrees or less but the boom is
extended to less than 5.3 m.
• The boom lowering operation is
available.