2. CLSS
Section 2.6
Electronic Controller
CLSS Controller Outline.
The changes in the engine speed by pump load are detected by the
engine speed senses and fuel control dial out-put signal. The pump
controller calculates these signals and sends the results to the LS & PC
EPC solenoids, this way the pump is delivering optimum delivery
matching the engine torque.
3. CLSS
Section 2.6
Electronic Controller
Engine and Pump Control.
The operator can set the work mode to
suit the type of working conditions.
Work Modes: A Active.
E Economy.
L Lift.
B Breaker.
Engine/pump control signals
Inputs: Throttle dial.
Electric motor/potentiometer.
Engine speed sensor.
Oil pressure sensors.
PPC oil pressure switches.
Monitor panel.
Out puts: LS EPC valve.
PC EPC valve.
4. CLSS
Section 2.6
Electronic Controller
PPC Pressure Switches.
Each pilot circuit has a pressure switch, when the work equipment is activated as the
controller needs to know which circuit is activated.
The controller will de-activate Auto-deceleration.
Each system that’s activated requires different functions to occur to enable that
circuit to complete its task. (eg. Swing circuit)
5. CLSS
Section 2.6
Electronic Controller
Swing Control
Function
When the swing lever is
activated the swing PPC
pressure switch will send a
signal to the controller.
The controller receives the
signal and knows the swing
break must be released.
The controller sends a
current to the Swing Holding
Brake solenoid to open the
solenoid and allow pump
pressure to release the
brake.
When the swing lever is
released the controller stops
the signal to the solenoid
3 seconds later.
6. CLSS
Section 2.6
LS & PC EPC Solenoids
PC EPC and Swing Lock
Prolix Switches
If there is a failure in the pump
controller, the Prolix Switches can
be switch on to by-pass the
controller. They can be activated
individually.
When the prolix switch to the PC
EPC is on current is supplied
through a resistor, the signal
becomes constant so the force
pushing the PC valve is constant.
There is no pump sensing.
The swing lock solenoid will
receive a constant current, this will
release the swing brake all the
time.
