Case CX Series - Attachment Operation

HYDRAULICS – CX210/CX240
6 - 3
CX EXCAVATORS
ATTACHMENT
Operation Function Explanation
Boom Raise 1) Two pump flows inside the control valve are
combined, when the boom1 and boom2 control
spools are shifted.
See pages
24-25
Boom Lower 1) When a built-in anti-drift valve in the control valve is
opened and boom1 spool is shifted, the boom can be
lowered.
2) A regeneration valve inside the boom1 control spool
provides additional speed.
3) Only one pump flow is used.
See pages
26-27
Arm Open (Out) 1) Two pump flows inside the control valve are
combined, when the arm1 and arm2 control spools
are shifted.
See pages
28-29
Arm Close (In) 1) When a built-in anti-drift valve in the control valve is
opened and arm1 spool is shifted, the arm can be
closed.
2) Two pump flows inside the control valve are
combined, when the arm1 and arm2 control spools
are shifted.
3) A regeneration valve provides additional speed.
See pages
30-31
Cushion “ON”
Operation
(Boom & Arm)
1) As a control spool returns to neutral (center) position,
the pilot oil must return through an orifice in the
cushion valve.
2) The slow movement of the spool provides the
cushion feature.
3) The Cushion only occurs in the boom and arm
circuits.
See pages
32-35
Cushion “OFF”
Operation
1) When the cushion solenoid is energized pilot
pressure is sent to the cushion valve, the orifices are
shifted out of the circuit and the cushion feature will
not function.
See pages
36-37