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[CHECKING AFTER STARTING ENGINE]
Check the following in this section after starting the engine and before starting the first work every day.
CAUTION
The checkups described in this section should be carried out after starting the machine.
Refer to "Starting the Engine in the MC-174C Operation Manual page 3-54" and later to execute
the engine startup, traveling operations, outrigger operations and crane operations.
[1] CHECKING FUNCTIONS OF BOOM
At the performance of function check for boom, ensure the safety so that hook and boom do not
interfere with any personnel or object.
1. Check abnormal noise from boom and searcher hook during
crane operation.
2. Operate crane without load and check each bolt so that no one
is missing or loose.
3. Check hook for deformation, abnormal noise from bearing and
correct function of wire rope latch (1).
[2] CHECKING MOMENT LIMITER FOR OPERATION (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 codes are displayed on the “RATED TOTAL LOAD” display.
4. Shift the fall mode selector switch on moment limiter display unit to ”Searcher hook mode” (all LED
ON).
5. Start the engine and operate the crane as follows to verify that 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
1.8 m
Displayed “boom length” with the boom length at maximum
5.5 m
Displayed “working radius” with the boom length of “2.9 m” and boom angle of
“55.5 °“
1.5 ± 0.1 m
Displayed “ACTUAL LOAD” when the weight of the known weight was hoisted
Must be equal to the total weight of lifting ring
Note that it may show some errors depending on the boom conditions.
Actual load
6. Operate the crane until the moment limiter display indicates the boom length is "2.9 m" (booms (1) +
(2)) and boom angle is "55.5 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.