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Operation—Operator's Station
KR46761,000114F -19-05APR16-1/1
Hydraulic Oil Tank Pressure Vent Switch—If
Equipped
The purpose of this system is to provide the operator a
method of minimizing oil leakage in the event of an oil line
rupture or part malfunction. The hydraulic oil tank on the
machine is tted with a ller cap that allows a pressure of
48 kPa (0.48 bar) (7 psi) to be created inside the tank.
The purpose of this pressure is to maintain a positive
pressure on the suction side of the main pumps to prevent
pump cavitation. The downside effect of this pressure is
that hydraulic oil will continue to leak until the operator
vents this pressure.
The system incorporates a hydraulic oil tank pressure
vent solenoid (2) that bypasses the cap and provides
an electrically controlled method for venting the tank
pressure. The hydraulic oil tank pressure vent switch (1)
(momentary push-button switch) on the left console in the
cab operates this valve. To prevent inadvertent actuation
and possible pump cavitation, the controls are electrically
interlocked with the key switch so that key switch must be
in OFF position before the system can be activated.
1— Hydraulic Oil Tank Pressure
Vent Switch
2— Hydraulic Oil Tank Pressure
Vent Solenoid
TX1213303 —UN—01JUN16
Hydraulic Vent Switch
2
TX1213706 —UN—04APR16
Hydraulic Tank
2-1-10
112321
PN=103
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