Section 5 – FLY-JIB INSPECTION AND MAINTENANCE Mini-Crawler Crane M A E D A
5-86 1/2019 MC405C-3
Winch and Boom
WARNING! Whilst performing the function
check for winch and boom, ensure the safety
of personnel so that the hook and boom do
not interfere with any personnel or objects.
1. Check abnormal noise from boom, hook and
any area of wire rope during crane
operation.
2. Operate crane without load and check for
loose or missing bolts.
3. Check hook for deformation, abnormal noise
from bearing and correct function of wire
rope latch, (1).
Fig. 5-202
Moment Limiter for Operation (Fly-jib
Mode)
WARNING! If you find any abnormality with
the moment limiter, immediately contact us or
our sales service agency.
1. Turn starter switch ON.
2. Check rotary lamp. First, red revolving light
will appear for approximately 2 seconds, and
then turn to green revolving light.
3. Check moment limiter display. Ensure that
error code do not appear in Rated load
display.
4. Ensure that fly-jib mode is effective. ("Jib"
shall be displayed in Boom length display
alternately with boom length in fly-jib mode)
5. Start engine and operate crane as specified
below to check correct indication of moment
limiter.
Crane motion and moment limiter
indication
moment
Boom is extended to 13.0m or longer
then lowered. Check boom angle
indication when rated load display
55°
Boom is extended to 13.0m or longer
then raised. Check boom angle
indication when rated load display
76°
Indication of working radius display,
when boom is extended to "16.5m",
with full extension of five stages and
boom angle is raised to "72°".
7.0 ± 0.1m
Indication of actual load display when
a rated weight is prepared and lifted.
• Indication shall be identical to total
weight including sling equipment.
• Some deviation may be allowed
under certain boom conditions.
Actual
load
Initial 10 Hour Maintenance
The following maintenance should be performed
after 10-hour operation, limited to the first
maintenance of a new machine.
Greasing Fly-Jib Foot Pin
For maintenance items and procedure, see
"Maintenance Every 250 Hours" on page 5-87.
Irregular Maintenance
Replacement Winch Wire Rope
WARNING! Always wear leather gloves when
replacing the wire rope.
CAUTION:
• The diameter of the wire rope is to be
measured at points where the wire
repeatedly runs through the sheave. A mean
value needs to be determined through
three-way measurement. (A measurement
should be performed at several points,
spacing between the points.)
• DO NOT use the old wire rope regardless of
the frequency of use.
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