Unic URW295CR, Руководство по обслуживанию

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10.1 Oil flow in the in‑out body
when no operation is carried out
（１０−１）
Pressure reducing
valve
Emergency screw
Oil fed out of pump returns to tank via back‑pressure valve
and pressure regulator valve.
Pressure in hydraulic circuit at this point is to be 2MPa.
Working pressure
of pump is maintained
at 2Mpa.
Pailot pressurer Solenoid valve for unloading
Relief valve for
storing hook
Solenoid valve for
storing hook
Pressure regulator valve
Back pressure valve
Main relief
valve
Tank
Feedback
Set‑bolt
Solenoid valve for
storing hook
Primary
pressure
Secondary
pressure
Solenoid valve
for unlading
pressure reducing valve
Pump
Tank
2
Main relief valve
2
Relief valve for storing hook
2
Back pressure valve Pressure regulator
valve
2
Emergency screw
(stop valve)
3.0MPa
(30kgf/cm )
20.6MPa(210kgf/cm )
Set‑bolt
(stop valve)
3.9MPa(40kgf/cm )
Working
pressure
G.P
Pailot pressurer
G.P
1.0MPa
1.0MPa
(10kgf/cm )
Feedback
(10kgf/cm )
2
Port relief for storing hook
Solenoid valve
for unlading
Pressure reducing valve
Gauge port for Poilot pressure
Main relief valve
Back pressure valve
3.0MPa(30kgf/cm )
2
2
1.0MPa(10kgf/cm )
Tank port
Solenoid for storing hook
Accelerator
cylinder
Gauge port
Needle valve for releasing
autmatic stop for over‑winding