Maeda MC405C-3 - Change to Single Fall Hook from Main-Boom Hook Block

Section 4 – FLY-JIB INSTALLATION AND STOWAGE Mini-Crawler Crane M A E D A
4-160 1/2019 MC405C-3
Change to Single Fall Hook from
Main-Boom Hook Block
NOTICE: This section is the explanation of the
method to change single fall hook block for
regular hook block after stowing Fly-jib.
WARNING! Always stop the engine during
changing of hook block. If you work without
stopping the engine, machine may suddenly
move to result in a serious hazard.
1. Disconnect wiring (42) from main boom and
extension cord (43) from No.1 Fly-jib cord
reel (13) at connector, then connect wiring
(42) with wiring (41) from over winding
detector (40).
Fig. 4-475
WARNING!
• Always connect wiring (42) from main boom
with wiring (41) from over winding detector
(40). Without changing connection of wiring,
over winding detector will not work and may
drop the hook or load, and result in a
serious hazard.
• Before crane operation, always raise hook
to confirm whether hook will stop
automatically when hook hits the over
winding detector weight.
2. Remove single fall hook according to
following information.
(1) Press boom stowing switch to lower
boom to level, and deposit single fall
hook (10) slowly on the ground.
(2) Take off one bolt (54) (M8x12L) and one
washer (55) and pull wedge socket pin
(53). Then remove wedge socket (52)
from single fall hook (10).
(3) Remove two wire clips (56) and weight
stopper (44).
Fig. 4-476
(4) Fit the bar (A) (4 - 6mm in diameter) to
the rope wedge (57) and hammer to the
direction as indicated by arrow (a) to
remove the rope wedge (57).
(5) Remove wire rope (11) from rope
wedge (52).
Fig. 4-477
(6) Pull wire rope (11) out from weight (9) of
over winding detector (6).
(7) Remove protective rope (8) and
protective weight (9).
Fig. 4-478