Maeda CC1485S-1, Инструкции по эксплуатации, Страница: 157 / 370

149
[5] CHECKING OVER HOIST PREVENTION DEVICE
When performing the winch winding up operation and boom
extending operation with the hook block (1) in a overwound
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
automatically stopped.
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 rotating warning lamp. After the rotating warning lamp of all colors illuminates for
approximately 3 seconds, the green rotating warning lamp illuminates.
3. Start the engine and operate the crane as follows. Then, check if the display of the moment limiter
is correct.
Crane operation and display item
Display value of moment
limiter
Display value of "Boom length" when boom length is set at minimum 4.7m
Display value of "Boom length" when boom length is set at maximum 16.3m
Display value of "Working radius" when the boom length is set at "4.7
m" (boom one stage) and the boom angle is set at "50.0 degrees"
3.0±0.1m
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" when making the
display value of the moment limiter "4.7m" (4.7m boom) for the boom length and "50 degrees" for
the boom angle. If there is any difference between the actual measurement and display value of
the moment limiter, contact us or our sales service agency.