Zoomlion ZCC1100, Operator'S Manual, Page: 191 / 291

Operator’s Manual for Crawler Crane
Crane
Operation
4-51
4.5.7 Operation of slewing mechanism
4.5.7.1 Components of slewing mechanism
The slewing mechanism consists of hydraulic motor, planetary gear reducer, brake, drive gear
and slewing ring, etc. The superstructure can carry out 360° continuous rotation via the slewing
ring which is driven by drive gear. The slewing speed can be adjusted by changing the
inclination angle of control lever.
An independent variable piston pump is applied to the hydraulic system to supply oil. It can
adjust the slewing speed accurately.
4.5.7.2 Operation of slewing mechanism
Two slewing alarms on the rear counterweight will sound during slewing.
Move left control lever to right, slew to right.
Move left control lever to left, slew to left.
CAUTION
(1) Before carry out slewing movement, an acoustic signal should be given out.
(2) Operating with high slewing speed will cause an increased risk of accidents! Before
initiating any slewing movements, the operator must make sure that there are no
persons or obstacles within slewing radius. Otherwise, there is an increased risk of
accidents.
(3) Longer boom – slower slewing speed. Heavier load – slower slewing speed.
(4) Check the gradient of the working ground before slewing with a load.
4.5.7.3 Fixing device for slewing table
a) Slewing fixing pin
During transportation, the slewing table is fixed on the undercarriage via the slewing fixing
pin so as to avoid accidents.
Procedure for fixation of slewing table:
-
Slew superstructure to front or right position;
- Pull out the slewing fixing pin;
-
Rotate the fixing pin for 180°;
-
Insert the fixing pin.
See the following figure.
For reference only.
Operators manual should be consulted and adhered to.