9-17
[CHECKING AFTER STARTING ENGINE]
The checkups described in this section should be carried out after starting the machine.
See "Operation 2.2 Starting the Engine" and later to execute the engine startup, travelling operations,
outrigger operations and crane operations.
[1] CHECKING MOMENT LIMITER FOR OPERATION (850kg SEARCHER HOOK MODE)
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 with the working status lamp. The red of the lamp lights up for 2 seconds and then the green lights up.
3. Check the moment limiter display unit.
Verify that no error code is displayed at the “RATED TOTAL LOAD” display on the display panel.
Check if moment limiter is set as 850kg searcher hook mode, and display in boom length window matches
actual searcher hook offset position.
See “Searcher Hook offset position and boom length window display” on page 9-9 for correct setting.
4. Shift the part of line selector switch on moment limiter display unit to ”850kg Searcher hook mode”.
5. Start the engine and operate the crane as follows to verify if the moment limiter properly displays the value.
Crane Operation and Displayed Parameter
Value Displayed on
Moment Limiter
Displayed “boom length” with the boom length at minimum 3.7 m
Displayed “boom length” with the boom length at maximum 12.5 m
Displayed “working radius” with the boom length of “5.9 m” and boom angle of
“25 °“
SH1 5.7 ± 0.1 m
SH2 6.1 ± 0.1 m
SH3 5.8 ± 0.1 m
6. Check if displayed actual load value is equal to the total weight of the load + the hoisting accessory, when the
weight of the known load is hoisted. There may be slight error in accuracy depending on boom condition.
7. Operate the crane until the moment limiter display indicates the boom length is "5.9 m" and boom angle is "25
degrees", then measure the "boom angle" and "working radius.
If the measured value(s) differ from the moment limiter display value, contact MAEDA or MAEDA sales agency.
8. Lift up load and check if boom extending or boom lowering operation is auto-stopped when overloaded. If the
operation is not auto-stopped in overloaded condition, please contact us or our sales service agency and do not
use the machine.
This checking operation must be operated slowly, and if machine does not auto-stop by overloading,
immediately stop the operation, and perform recovery operation caused by overloading.
NOTES
When measuring actual working radius, measure from hook offset position of searcher hook.
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