
Operator’s Manual for Crawler Crane
Crane
Operation
4-36
4.4.11 Checklist of safety device
Table 4-14
Checklist of safety device
No.
Prerequisite
limited movements
Bypass methods
Movement speed
1
The load hook of
hoisting winch
comes into
contact with the
hoisting limit
switch weight
during its upward
movement. (take
H1 winch as an
example)
1. The crane
movement “lift the
hook” is cut off.
2. The icon
flashes on the
load moment
limiter.
3. The tricolor light
sends out yellow
and red warning,
and the buzzer
sounds
continuously.
1. Turn the bypass switch
clockwise until the icon
appears on the load moment
limiter. At this time, the limited
movement is bypassed.
However, the tricolor light
sends out red warning, and the
buzzer sounds continuously.
2. Rotate hoisting bypass switch
clockwise until the icon
appears on the load moment
limiter. The limited movement
is bypassed. However, the
tricolor light sends out red and
yellow warning, and the buzzer
sounds continuously.
1. When bypass
switch is turned
on, the speed of
crane
movement
decrease.
2. When pressing
the “hoisting
bypass switch”,
the speed of
crane
movement is
kept the same.
2.
There are only
three windings of
wire rope left on
the hoisting
winch. (take H1
winch as an
example)
1. The crane
movement “lower
the hook” is cut
off.
2. The icon
flashes on the
load moment
limiter.
3. The tricolor light
sends out yellow
and red warning,
and the buzzer
sounds
continuously.
1. Turn the bypass switch
clockwise until the icon
appears on the load moment
limiter. At this time, the limited
movement is bypassed.
However, the tricolor light
sends out red warning, and the
buzzer sounds continuously.
2. Rotate lowering bypass switch
clockwise until the icon
appears on the load moment
limiter. The limited movement
is bypassed. However, the
tricolor light sends out red and
yellow warning, and the buzzer
sounds continuously.
1. When bypass
switch is turned
on, the speed of
crane
movement
decrease.
2. When pressing
the “lowering
bypass” switch,
the speed of
crane
movement is
kept the same.
3
90% ≤ moment
percent ≤ 100%
The tricolor light
sends out yellow
warning, and the
buzzer sounds
continuously.
No work
mechanism slows
down.
For reference only.
Operators manual should be consulted and adhered to.
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