Zoomlion ZCC1100, Operator'S Manual, Page: 174 / 291

Operator’s Manual for Crawler Crane
Crane
Operation
4-34
4.4.8 Hoisting limiter
Figure 4-34 Hoisting limiter
The hoisting limiter is installed to prevent the hook pulley from colliding with the boom head.
Before using the crane every time, inspect the switch by lifting the hook to the upper limit and
colliding with the hoisting limit switch weight.
If the load hook comes into contact with the hoisting limit switch weight during its upward
movement, the hoisting limit switch is triggered. Under this condition, the buzzer will sound, the
tricolor light will send out yellow and red warning continuously, and the icon appears on
the load moment limiter. At this time, the crane movements “spool up H1, H2 and H3” and
“derrick boom down” are switched off.
CAUTION
Bypass those limited movements in accordance with the following methods:
(1) Turn bypass switch (in the electrical control box of slewing table) clockwise until
the icon appears on the load moment limiter. At this time, the limited
movements are bypassed. However, the tricolor light sends out red warning and the
buzzer sounds continuously.
(2) Rotate hoisting bypass switch (No.7 in the figure 4-2) clockwise until the icon
appears on the load moment limiter. At this time, the limited movements are
bypassed. However, the tricolor light sends out yellow and red warning, and the
buzzer sounds continuously.
DANGER
(1) The hoisting bypass switch or bypass switch is only used in commissioning and
maintenance condition or to avoid accident occurring.
(2) If hoisting limiter is bypassed, there is a risk of increasing accidents!
For reference only.
Operators manual should be consulted and adhered to.