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3.
Description of the
hydraulic system
3.1
General
The LCS hydraulic units have been
developed to be used together with active
(pressure applied) and passive (spring
applied) brake calipers from Twiflex Ltd.
The pump can be connected to one or more
brakes.
The hydraulic power unit typically consists of
2 main items:
Base unit (including tank, manifold,
motor and pump)
Optional junction box (including
terminal rail, mounting plate and
lifting eye)
Except for the dimensional drawing and
mounting/handling instructions this manual
contains no further information about the
cabinet.
The power unit is described in detail
including functionality, assembly/mounting,
pressure settings, spare parts, description of
main parts, maintenance, trouble shooting,
and hydraulic fluids, etc.
The junction box is illustrated in the
electrical diagram (see Appendix D) and is
installed in order to simplify the electrical
connection.
3.2
Function
(See the hydraulic diagram section 3.3)
3.2.1
System energy
In the hydraulic system an electric motor (4)
and a pump (2) convert electrical power into
oil pressure and oil flow.
Pressure is limited by:
The pressure switch (40) that turns
off the motor when the preset
pressure is reached.
A system relief valve (16).
Pressure is monitored by a pressure switch
(40). If pressure drops below the pre-set
value the motor will restart to increase
pressure.
The check valve (17) prevents pressure
from returning to tank when the motor stops.
The accumulator (A1) provides an additional
volume of pressurised oil to minimise the
number of motor starts.
3.2.2
Applying the brakes.
Operating the motor (4) (on) and closing of
valve (23) (off), transfers the oil from the
pump to the brakes.
3.2.3
Releasing the brakes
When opening valve (23) (on) and stopping
the motor (4) (off) this will dump the oil to
tank, which immediately releases the
brakes.
3.2.4
Monitoring
Pressure switch (40) monitors the system
pressure (see 3.2.1).
When there is a need to re-pressurise the
system it will restart the motor (providing a
signal for a maximum of 5 seconds)
Transmisiones FU Ibérica, S.L.
C/ África 17 · Polígono Industrial Can Mora · 08459 - Sant Antoni de Vilamajor · Barcelona · SPAIN
+34 93 268 18 33
fuiberica
@
fuiberica.com
www.fuiberica.com
