Maeda CC423S-1, Operation Manual

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6.3.2 INSPECTION AFTER STARTING ENGINE
Check the following in this section after starting the engine and before starting the work every day.
[1] Inspection of boom operations
When checking the operation of the boom, make safety checks to ensure that the hook and the
boom do not come in contact with people or objects.
• Check the boom and searcher hook make no abnormal sounds when operating the crane.
• Operate the crane with no load and check that all the bolts are securely tightened and have not fallen
out.
[2] Inspection of moment limiter (on searcher hook selection)
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. After the rotating warning lamp of all colors
illuminates for approximately 3 seconds, the green rotating warning lamp illuminates.
3. Check the monitor display. Check that no error codes are displayed.
4. 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
Moment limiter
display values
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
Displayed value of “working radius” with boom length set to “3.2 m” (boom
stage 1), boom angle set to “50.0 degrees”, searcher hook position set to
“SH2”
2.8 ± 0.1m
5. Check that the display value of “Actual load”, when a weight whose mass is known is hoisted, is the
same as the total mass of the searcher hook + hoisting attachments. However, some error
may be generated depending on the boom condition.
6. Raise the weight and check whether it stops automatically due to overload on boom extending /
lowering / hoisting operation. If it does not stop automatically when overloaded, immediately contact us
or our sales service agency and do not use the machine.
When performing the checks, if there is no automatic stop as it is slowly overloaded, immediately stop
the operation and exit the overload condition through operation on the safe side.
7. Operate the crane and, with the moment limiter displaying boom length “3.2 m” and the boom angle “50
degrees”, make actual measurements of the “Boom angle” and the “Working radius”. If there is any
difference between the actual measurement and display value of the moment limiter, contact us or our
sales service agency.
NOTES
To measure the actual working radius, measure it from the hook position by suspending a cord vertically
from the hook at the tip of the searcher hook.