HYDRAULICS – CX210/CX240
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CX EXCAVATORS
FEATURES
Automatic Power Boost
1) When auto power boost is activated in H or S mode, the pressure setting of the main
relief increases from approximately 4900 psi to approximately 5400 psi and digging
force is increased.
2) This power boost increase will occur for 8-second intervals.
3) Power boost is on full time in L mode.
Note: The controller needs a load ratio signal from the engine controller and pump
pressure transducer input for auto bower boost.
During attachment operation the controller monitors the main pump pressures with
transducers at the pumps. It also monitors the engine load from the engine controller. If
either pump pressure rises above 4350 psi for 1 second and the load ratio of the engine does
not fluctuate more than ± 5% for 2 seconds the controller will activate power boost for 8
seconds. The load must be reduced before power boost will activate again.
The controller sends 24v to the power boost solenoid valve. The valve is shifted and directs
pilot pressure to the Ph port of the control valve and enters the spring chamber of the relief
valve. The pilot pressure adds to the spring pressure and power boost is achieved. After 8
seconds, the signal to the power boost solenoid valve is stopped. The power boost solenoid
is located in the six-solenoid valve bank, which is in the pump compartment.
Power Boost Solenoid
Yellow Wire Band
Pilot Pressure Solenoid
Blue Wire Band
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