M A E D A Mini-Crawler Crane Section 4 –
AUXILIARY WINCH - HOW TO INSTALL AND DETACH BOOM HEAD
1/2019 MC285C-3 4-135
AUXILIARY WINCH - HOW
TO INSTALL AND DETACH
BOOM HEAD
WARNING!
• If installation or detaching work is carried
out by two people, make sure of work detail
each other and use designated signs for
mutual communication during the work. If
signs are not enough, it may cause serious
accident, such as being hit by moving part.
• When installing or removing boom head,
carry out the work on level and firm ground
to avoid loosing balance during the work.
Boom head may rotate by its own weight
and it can lead to a serious accident.
• When installing or detaching boom head,
use stable work stand with enough height.
Using unstable work stand can cause falling
from high place, leading serious accident.
• When installing or detaching boom head, set
main boom angle to “0 degree”. If main
boom angle is bigger than “0 degree”,
proper installing and detaching work may be
interfered and it can cause serious accident.
• Boom head is fixed to boom by hitch part
and position pin.
• Surely set the hitch part to the boom.
• Insert position pin to correct position, and
secure with lynch pin.
• If position pin comes off, it causes boom
head to fall off, leading to a serious accident.
• When boom head is installed, change
electrical wiring from boom side of over
winding detector to boom head side of over
winding detector. If over winding detector
doesn’t work properly, it causes hook or
load to fall and may result in a serious
accident.
• When boom head is installed, always
change electrical wiring from over
un-winding detector of main winch to over
un-winding detector of auxiliary winch. If
over un-winding detector does not work
properly, it may cause wire rope to fall off,
which can result in a serious accident.
Installing Boom Head
WARNING! Stop the engine during operating
machine. If you operate crane without
stopping engine, the machine will suddenly
move to resort in a serious hazard.
1. See “OUTRIGGER SETTING” on page 4-38
and set the outrigger.
Fig. 4-358
2. Remove wire rope from main winch on crane.
Removal Winch Wire Rope
Use the following procedure to remove the
wire rope.
Fig. 4-359
(1) Place the boom telescoping lever in the
“Extend” position (push it toward the
front) to extend the boom slightly.
(2) Place the winch lever in the “Down”
position (push it toward the front) to
lower the hook block on the ground.
(3) Undo the wedge socket fixing bolt (1)
and remove the wedge socket (2).
(4) Remove the wire clip (3).
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