Service Manual 04/2010 Rev.B
74
6.0.1 HIGH PRESSURE CIRCUIT:
The high hydraulic pressure is controlled by the
valve 0.5 (Fig.52) and its range is from 50 to
200Bar (720 to 2880Psi).
This valve avoids overstress to hydraulic and
mechanical components.
The working of this valve is very easy: when the
hydraulic pressure inside of a cylinder reaches
160 (2300 P.S.I.), the valve opens and unloads
the oil directly into the reservoir.
The cylinders operating at high pressure are the
following:
Saddle cylinder.
Chuck arm cylinder.
Chuck cylinder.
6.0.2 LOW PRESSURE CIRCUIT:
The low hydraulic pressure is controlled by the
valve 4.1 (Fig.52) and its range is from 0 to
100Bar (0 to 1440Psi).
The working of this is the same of above one and
its purpose is to supply the minimum hydraulic
pressure to allow the tool holder movements.
The cylinder operating at low pressure are the
following:
Tool holder cylinder.
Robotic cylinder on King 5600R only.
NOTE: ALL HYDRAULIC CYLINDERS ARE
DOUBLE ACTING TYPE.
6.0.3 DESCRIPTION OF THE
FUNCTION:
The description of the hydraulic function can be
grouped into 7 phases as following:
Machine in rest position.
Rise and descent of chuck arm.
Left and right of saddle.
Opening and closing of the chuck.
Left and right the tool holder
Rise and descent of the tool holder cylinder
ON KING 5600R ONLY
Double movements.
6.0.4 MACHINE IN REST POSITION:
When the machine is switched on but not
operating, the hydraulic oil (Fig.52) is pumped
through all valves in rest position, and then it
returns to the reservoir.
6.0.5 LEFT / RIGHT OF CARRIAGE:
LEFT: Oil flow reaches the side “B” of the
cylinder 1.4 through the valve Y1B. Oil in
opposite side “A” gets out and returns to
reservoir through the valveY1N (Fig.52).
RIGHT: Oil flow reaches the side “A” of the
cylinder 1.4 through the valve Y1N. Oil in
opposite side “B” gets out and returns to
reservoir through the valve Y1B (Fig.52).
6.0.6 RISE AND DESCENT OF CHUCK
ARM:
RISE:
The oil flow arrives to the valve Y2B,
which is opened, and unlocking the valve 2.5,
it reaches the side “B” of the cylinder 2.7
making the wheel lifting.
Oil contained in opposite side ”A”, returns to
the reservoir through all others valves.
Safety valve 2.5 prevents any unexpected
chuck arm lowering from oil hose breakage or
defective coil valve (Fig.52).
DESCENT: Oil flow, before reaching the side
“A” of cylinder 2.7 through the valve Y2N, is
forced to the safety valve 2.5 to get its
unlocking.
Oil contained in opposite side “B”, gets out
through the valve 2.2, which control the
lowering speed of the chuck arm, and returns
to reservoir through all other valves (Fig.52).
NOTE: THE SAFETY VALVE 2.5 IS
INSTALLED ON CE PROVED MACHINES
ONLY.
6.0.7 OPENING AND CLOSING OF
THE CHUCK:
OPENING:
Oil flow reaches the side “A” of the
cylinder 3.5 through the valve Y3N and when
the cylinder has reached the maximum
pressure, the locking valve 3.4 avoids
dropping of hydraulic pressure.
CLOSING:
The oil flow is forced to the locking
valve 3.4 through the valve Y3B to get its
unlocking.
Oil contained in the side “B” of the chuck
cylinder 3.5 returns to the reservoir through all
other valves (Fig.52).
6.0.8 LEFT / RIGHT OF TOOL HOLDER:
LEFT: Oil flow reaches the side “B” of the
cylinder 4.5 through the valve Y5B. Oil in
opposite side “A” gets out and returns to
reservoir through the valveY5N (Fig.52).
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