Case CX Series - Attachment Operation

HYDRAULICS – CX130/CX160
5 - 3
CX EXCAVATORS
ATTACHMENT
Operation Function Explanation
Boom Raise 1) With boom up only operation two pump flows inside the
control valve are combined, when the boom1 and
boom2 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) Only one pump flow is used.
3) A regeneration circuit inside the control valve provides
additional speed and prevents cavitation.
See pages
26-27
Arm Open
(Out)
1) With arm only operation two pump flows inside the
control valve are combined, when the arm1 and arm2
spools are shifted.
See pages
28-29
Arm Close (In) 1) With arm only operation two pump flows inside the
control valve are combined, when the arm1 and arm2
spools are shifted.
2) When a built-in anti-drift valve in the control valve is
opened and arm1 spool is shifted, the arm can be
closed.
3) A regeneration circuit inside the control valve provides
additional speed and prevents cavitation.
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