Milton CAT 390D L - Manual (Page 3)

3
Hydraulics
Precise power and control to move more material
Main Pumps
The hydraulic system includes three pumps with an
independent swing circuit. The hydraulic circuit utilizes
a load-sensing system to ensure high effi ciency and
productivity with little hydraulic loss.
Swing Dampening Valve
A swing dampening valve reduces wagging, which produces
smoother, time-saving swing stops.
Implement Pressure
Increased implement pressure provides shorter cycle times,
stronger digging forces and greater bucket fi ll factors.
Auxiliary Hydraulics
Standard auxiliary hydraulics are managed electronically,
making the machine more versatile.
Proportional Priority Pressure Compensation (PPPC)
Hydraulics
The load-sensing PPPC system with proprietary electronic
actuation provides excellent effi ciency and controllability.
• Pump discharge fl ow matches the operator’s desired
speed, which makes for extremely smooth shifting
from neutral to full stroke.
• Pump fl ow volume all goes to the actuator, which
ensures the delivery of maximum hydraulic energy.
• Even if load pressure changes during actuation, the
control lever position does not vary, which makes
for consistent, reliable operation.