Maeda MC405C-3 - FLY-JIB INSPECTION AND MAINTENANCE

Mini-Crawler Crane M A E D A Section 5 – FLY-JIB INSPECTION AND MAINTENANCE
1/2019 MC405C-3 5-83
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
4.7 m
Displayed "boom length"
with the boom length at
maximum
16.5 m
Displayed "working radius"
with the boom length of
"7.7 m" and boom angle of
"25°"
SH1 7.3 ± 0.1 m
SH2 7.6 ± 0.1 m
SH3 7.2 ± 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 "7.7 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 us or
our sales service agency.
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 offset position of searcher
hook.
FLY-JIB INSPECTION AND
MAINTENANCE
Legal Inspection
In the event that federal or local laws or
regulations requires regular inspection to
maintain safe operation of machine, check items
below:
1. Check condition of safety devices.
2. Check condition of lifting equipment such as
hook blocks.
3. Check damage to winch wire rope end and
wire clips.
4. Replace wire rope immediately when any
damage is detected.
5. Check for cracks or deformations of
structure members such as boom.
6. Check loose or missing fasteners and
fittings.
7. Check correct motion and stoppage of winch
by actual operation.
In the event that such inspections detect any
disorder, contact your local distributor.
Consumables
Wire rope and fly-jib fix bolts are consumable
items. Replace them at periodic inspection or
before they reaches abrasion limits. Replace
consumable items regularly which will produce
the most economical use of this machine.
Always replace with Maeda genuine parts.
Check parts catalogue for correct part number
before ordering.
List of Consumables
Item
Replacement cycle
Winch wire
rope
Based on wire rope
exchange standard
Fly-jib fix bolt
M12x30L
(4pcs)
Every 6 months or when
damaged, cracked, or
squashed.
The cycles include a halt period.
Contact us or our sales service agency for part
replacement.