STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
3B
-
15
ON THE LEFT CONTROL PANEL:
1). Parallel connection button SH, Graphical symbol , with functions as
follows:
The button is used in the special case such as telescoping, changing fall, and so on.
When move the trolley to the jib foot or raise the hook to limited position, the limited
switch cut off. Press the button SH so as to continue moving the trolley to the jib root
of the crane tower or making the hoist hook to a highest position until finishing the
aforementioned job.
2) Slewing brake locking button XRFS, Graphical symbol ,
with
functions as follows:
In the windy working circumstance and the speed of the wind is under 20m/s, it’s
necessary to hoist a load in fixed point. As the button was pressed, apply the slewing
brake, which made jib fixed in place well and truly. But the premise is to stop the jib
absolutely by button XRFS so as to prevent the mast tower from distortion. In the left
joystick, the trolleying and slewing are operating at the same time. The control lever
can switch in various directions. The trolley moves ahead
DVA
as push the lever
ahead, in reverse,
DAR
. the jib slew to the left
RG
as push the lever towards left
RD
.
In reverse
.
The lever can be pushed at random towards left or right without limit of
shift. The bigger the turning angle of the lever is, the faster the speed of slewing will
be. The lever can also pushed in oblique direction (to be controlled in the form of *)
which drive both the trolleying and slewing operate in 2 direction at the same time.
There are locking mechanism and zero protective devices for preventing the lever
from unconscious movements, which is likely to run mechanisms and result in
accidents. The power supply cannot be started if the lever is not in neutral (zero)
position. Take hold of the lever as shown in figure and lift locking pin up with finger,
then push the lever. Before raise locking pin, it was strictly forbidden to push the lever
lest parts was destroyed.
The levers on both the left control panel and the right control panel have the function
of auto-reset (returning zero).
