Maeda MC285CB-3 - Pre-Start - after Starting Machine; Moment Limiter for Operation (Searcher Hook Mode)

M A E D A Mini-Crawler Crane Section 5 – SEARCHER HOOK INSPECTION AND MAINTENANCE
9/2020 MC285CB-3 5-57
Pre-Start – After Starting Machine
CAUTION: The checkups described in this
section should be carried out after starting the
machine.
See “Starting the Machine” on page 4-26 and
later to execute the machine startup, travelling
operations, outrigger operations and crane
operations.
Moment Limiter for Operation (Searcher
Hook Mode)
WARNING! 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 flashes for 2 seconds and
then the green and yellow flash.
3. Check the monitor display.
Verify that no error code is displayed on the
Home Screen.
Verify that the actual searcher hook position
matches the position displayed on the
monitor.
For more information on the actual position
and position switching, see “Moment Limiter
Settings” on page 4-120.
4. Start the machine 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
2.5 m
Displayed “boom length”
with the boom length at
maximum
8.6 m
Displayed “working
radius” with the boom
length of “4.4 m” and
boom angle of “29.2°”
SH1 4.2 ± 0.1 m
SH2 4.2 ± 0.1 m
SH3 4.1 ± 0.1 m
5. Check if displayed actual load value is equal
to the total weight of the load + searcher hook
(20 kg) + the hoisting accessory, when the
weight of the known load is hoisted. There
may be slight error in accuracy depending on
boom condition.
6. Operate the crane until the moment limiter
display indicates the boom length is “4.4 m”
and boom angle is “29.2 degrees”, then
measure the “boom angle” and “working
radius.
If the measured value(s) differ from the
moment limiter display value, contact us or
our sales service agency.
7. 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, stop
using the machine and contact us or our
sales service agency.
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.
NOTICE: When measuring actual working radius,
measure from hook position of searcher hook.