M A E D A Crawler Crane 4.4 OVERWINDING PREVENTION DEVICE
5/2020 CC1908S-1 4-33
4.4 OVERWINDING
PREVENTION DEVICE
IMPORTANT
When hoisting the hook block, be careful of
the clearance between the hook block and
boom.
Extending the boom also raises the hook
block.
Always check the hook block height when
extending the boom.
(1) Hook block
(2) Overwinding detector
(3) Weight
(4) Boom
When the hook block (1) is hoisted or the boom (4)
is extended and consequently the hook block (1)
nears the boom (4) tip and pushes up the weight
(3), the overwinding prevention device
automatically stops the hook block (1) from
hoisting and the boom (4) from extending and
prevents any further operation. The overwinding
prevention device sounds the buzzer
intermittently to warn of overwinding, but only
when hook hoisting and boom extension is
performed simultaneously.
When the warning buzzer sounds, immediately
operate the right-hand control lever to the "Hoist
down" side (push forward) or the left-hand control
lever to the "Retract" side (pull toward you) to
lower the hook block (1).
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