Section 5 – AUXILIARY WINCH INSPECTION AND MAINTENANCE
Mini-Crawler Crane M A E D A
5-80 1/2019 MC285C-3
Moment Limiter for Operation (Auxiliary
Winch 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
light flashes for 2 seconds, then the green
light flashes.
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 auxiliary winch mode.
4. 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
Displayed “boom length”
with the boom length at
maximum
Displayed “working radius”
with the boom length of
“4.4 m” and boom angle of
“29.2 °”
5. 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.
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 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
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 offset position.
Replacement of Winch Wire Rope
NOTICE: For more information on the criteria for
wire rope replacement, refer to “Inspecting Wire
Rope.”
Winch Wire Rope - Removal
1. Place the machine on level, hard ground.
2. Push the boom telescoping lever forward to
EXTEND and extend the boom slightly.
3. Push the winch lever forward to DOWN to
ground the hook block.
4. Remove wedge socket fixing bolt (1), wedge
socket pin (2), and then remove wedge
socket (3).
Fig. 5-167
5. Remove the wire clip (4).
6. Remove wire rope (5) from the wedge socket
(3), using the following procedure:
Fig. 5-168
• Have a piece of round bar (6) with a
diameter of 4 to 6 mm ready and apply it to
rope wedge (7).
• Lightly tap round bar with hammer in the
direction of the arrow (a) to remove the rope
wedge.
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