Lukas CT7 - Manual (Page 9)

9
Functions and performance 4.
4.1 Description
The control desks in the CT7 model series comprise a number of valves housed in a control
block. The valves are controlled by means of control levers.
Depending on the version, up to 6 double-acting and 2 single-acting hydraulic devices can
be connected and controlled without the need for a separate controller.
The attached, manually operated pressure shut-off valve opens and closes the supply to the
control valves. With the manual pressure shut-off valve in the “closed” position, the flow to
WARNING / DANGER / CAUTION!
The manual pressure shut-off valve closes only the connection to the hydraulic
unit to be supplied.
It is NOT provided as an “emergency stop” function. This means that the
connected hydraulic devices could still move if one of the control levers were
operated. This could happen if residual pressure in the system or external loads
were to act on the connected hydraulic devices.
the hydraulic pump is automatically depressurised.
The control desks are usually mounted on a separate pedestal or secured directly to the unit
frame. LUKAS control desks are normally always delivered mounted on a pedestal or fitted
to a frame. To find out more, please contact your authorised LUKAS dealer.
The control desk also features a pressure gauge on the inlet block as standard. This pressure
gauge indicates the pressure acting on the control desk from the unit.
Only LUKAS motor pumps are permitted to be used to drive the devices.
If an other-make pump power pack is used, it is important to ensure that it complies with
LUKAS specifications, as otherwise dangerous situations beyond the control of LUKAS
could arise. Particular care must be taken to ensure that the maximum permissible operating
pressure of the connected LUKAS devices is not exceeded.
REMARK:
Before you use pumps of a different manufacturer, you must contact LUKAS or
an authorised dealer.
The connection to the supplied hydraulic pump and to the implements is established by
means of hose lines, which are connected to each other by couplings.
4.2 Hydraulic supply
CAUTION!
Due to ram pressures in the hose lines, the maximum overall length of the hose
lines, from the unit to the control desk to the hydraulic device, is limited to 40 m
(131.2 ft.).
Long hose lines between the implement and control desk or unit and control desk
may result in delayed movement of the hydraulic implements (particularly in the
event of the automatic return of single-acting implements).
For work involving long hose lines at low ambient temperature, we recommend
the use of a hydraulic fluid with a low viscosity.