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[5] INSPECTION OF OVER-HOISTING PREVENTION DEVICE
When performing the winch winding up operation and boom
extending operation with the hook block (1) in a over-hoisted
state (a state in which the hook block (1) pushes up the
weight (3)), check that the buzzer sounds intermittently and
that the winch winding up operation and boom extending
operation fall into a stopped state.
If these events do not happen, the over-hoist detector (2)
may be faulty.
If the alarm does not stop sounding, the over-hoist detector
(2) may be faulty or the circuit may be open.
Ask us or our sales service agency for repair.
[6] INSPECTION OF MOMENT LIMITER
When an abnormality occurs in the moment limiter, immediately contact us or our sales service
agent.
1. Turn “ON” the starter switch.
2. Check the tri-colour revolving working status lamp. The red revolving lights illuminate, then all colours
of the revolving lights illuminate, then the green revolving lights illuminate.
3. Start the engine and operate the crane as follows. Then, check if the monitor display of the moment
limiter is correct.
Crane operation and display item
Monitor display value of
moment limiter
Displayed value of “boom length” when the boom length is minimum
3.2 m
Displayed value of “boom length” when the boom length is maximum
8.7 m
“Working radius” display value for boom length “3.2 m”, (1 boom stage),
boom angle “50.0 degrees”
1.9 ± 0.2 m
4. Check that the display value of “Actual load” when a weight whose mass is known is hoisted is same as
the total mass of the hoisting attachment. However, some error may be generated depending
on the boom condition.
5. Operate the crane and actually measure “Boom angle” and “Working radius” for when the moment
limiter values display boom length “3.2 m” (3.2 m boom) and boom angle “50 degrees”. If there is any
difference between the actual measurement and display value of the moment limiter, contact us or our
sales service agency.
Summary of Contents for CC423S-1
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Page 56: ...48 SAFETY LABEL LOCATIONS 2 2...
Page 59: ...51 24 Machine Mass 542 4773100 28 Working Radius Rated Total Load Chart 542 3582200...
Page 60: ...52 30 Safe Operation 557 3494500 31 Operating the Moment Limiter 542 2250000...
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Page 251: ...243 2 SPECIFICATION DIMENSIONAL DRAWING...
Page 255: ...247 4 WORKING RADIUS LIFTING HEIGHT 4 Fall Wire Rope...
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Page 262: ...254 3 MONITOR INDICATION 1 Searcher hook selector switch 2 Searcher hook position display...
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