Kubota WSM STa-30, Workshop Manual

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8-M5
ST
α
-30, ST
α
-35, WSM STEERING
[3] RELIEF VALVE (WITH CHECK VALVE)
If the pressure in the hydraulic circuit rises above the
set pressure of the relief valve, the relief valve will
actuate to prevent the pressure from rising further and
protect the hydraulic system. Also, if no oil is supplied
from the hydraulic pump, the relief valve will act as a
check valve and help draw oil from the return oil line to
the drain hose, thus making it possible to steer the
machine manually.
(Reference)
• Relief valve setting pressure: 10.7 to 11.7 MPa
109 to 119 kgf/cm
2
1550 to 1693 psi
Engine speed: Maximum
Oil temperature: 40 to 60 °C
104 to 140 °F
W1013696
[A] Relief Valve
[B] Relief Valve in Operation
[C] Check Valve in Operation a : From Control Valve
b : To Control Valve
c : From Pump
d : To Drain Hose
KiSC issued 11, 2006 A