Section 5 –
850 kg SEARCHER HOOK INSPECTION AND MAINTENANCE
Mini-Crawler Crane M A E D A
5-82 1/2019 MC405C-3
Pre-Start – Before Starting Engine
Check the following in this section without
starting the engine and before starting work
every day.
E-Boom, Frame and Hook
Check each part of the E-Boom, frame and Hook
for cracks, excessive deformation and
contamination etc. In addition, check bolts nuts
and pins for any looseness, drop and damage
etc. If you find any abnormality, repair.
Check hook for deformation, abnormal noise
from bearing and correct function of wire rope
latch (1).
Fig. 5-198
Greasing
Wipe off and clean old grease from contact point
(3) of shackle (2) and E-boom hole, and contact
point (4) of hook (1) and shackle (2), then apply
new lithium grease.
Fig. 5-199
Searcher Hook Fix Bolts
DANGER! If any damage is found on searcher
hook fixing bolts, please exchange for new
one’s right away.
Breakage of bolts will cause the searcher
hook to fall off.
Check if bolts used are the designated type.
Also check if there are cracks, damage,
squashing, heavy dirt, or rust on bolt.
If any abnormality is found, change the bolt for a
new one even it is earlier than expected bolt life.
Position Pin and Lynch Pin
Check if position pin is surely secured with lynch
pin.
Pre-Start – After Starting Engine
CAUTION: The checkups described in this
section should be carried out after starting
the machine.
See "STARTING ENGINE" on page 4-18 and
later to execute the engine 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 lights up for 2 seconds and then
the green lights up.
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 850 kg
searcher hook mode, and display in boom
length window matches actual searcher
hook offset position.
For correct setting, see "Searcher Hook
offset position and mode display in boom
length window" on page 4-143.
4. Shift the part of line selector switch on
moment limiter display unit to "850 kg
Searcher hook mode".
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