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275B SER
800-00152
HYDRAULIC PRESSURE SETTINGS
HYDRAULIC PRESSURE SETTINGS
HYDRAULIC PRESSURE SETTINGS
HYDRAULIC PRESSURE SETTINGS
HYDRAULIC PRESSURE SETTINGS
RELIEF VALVES
RELIEF VALVES
RELIEF VALVES
RELIEF VALVES
RELIEF VALVES
The Relief Valve portion of the control valves in your Barko Loader limit the flow of hydraulic oil, which relieves
the excess pressure in the hydraulic system, if for any reason pressure is built up above a predetermined, safe,
maximum.
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
The relief valve pressure setting has been arrived
The relief valve pressure setting has been arrived
The relief valve pressure setting has been arrived
The relief valve pressure setting has been arrived
The relief valve pressure setting has been arrived
at by our engineers after considerable experience
at by our engineers after considerable experience
at by our engineers after considerable experience
at by our engineers after considerable experience
at by our engineers after considerable experience
with and testing of this loader. The setting will
with and testing of this loader. The setting will
with and testing of this loader. The setting will
with and testing of this loader. The setting will
with and testing of this loader. The setting will
provide maximum safety and efficiency of operation.
provide maximum safety and efficiency of operation.
provide maximum safety and efficiency of operation.
provide maximum safety and efficiency of operation.
provide maximum safety and efficiency of operation.
DO NOT ALTER THIS RELIEF SETTING! Relief settings
DO NOT ALTER THIS RELIEF SETTING! Relief settings
DO NOT ALTER THIS RELIEF SETTING! Relief settings
DO NOT ALTER THIS RELIEF SETTING! Relief settings
DO NOT ALTER THIS RELIEF SETTING! Relief settings
increased beyond this setting could be dangerous
increased beyond this setting could be dangerous
increased beyond this setting could be dangerous
increased beyond this setting could be dangerous
increased beyond this setting could be dangerous
to life, limb and property.
to life, limb and property.
to life, limb and property.
to life, limb and property.
to life, limb and property.
Altering the settings on a new machine will void
Altering the settings on a new machine will void
Altering the settings on a new machine will void
Altering the settings on a new machine will void
Altering the settings on a new machine will void
the warranty.
the warranty.
the warranty.
the warranty.
the warranty.
The following is a list of pressure settings used on your Barko Loader. Any questions should be directed to the
factory. Phone 715-392-5641.
THE BOOM AND GRAPPLE FUNCTION VALVES:
THE BOOM AND GRAPPLE FUNCTION VALVES:
THE BOOM AND GRAPPLE FUNCTION VALVES:
THE BOOM AND GRAPPLE FUNCTION VALVES:
THE BOOM AND GRAPPLE FUNCTION VALVES:
Main Boom - up (butt end of main boom cylinder) ........................ 3000 P.S.I.
at the Port Relief
Main Boom - down (rod end of main boom cylinder) ..................... 600 P.S.I.
at the Port Relief
Secondary Boom - up (butt end of secondary boom cylinder) ....... 3000 P.S.I.
at the Port Relief
Secondary Boom - down (rod end of secondary boom cylinder) ... 3000 P.S.I.
at the Port Relief
Live Heel Boom - up (butt end of live heel boom cylinder) ............ 3000 P.S.I.
at the Port Relief
Live Heel Boom - down (rod end of live heel boom cylinder) ......... 1000 P.S.I.
at the Port Relief
Both Main Reliefs ......................................................................... 2250 P.S.I.
GRAPPLE ROTATE PRESSURE:
GRAPPLE ROTATE PRESSURE:
GRAPPLE ROTATE PRESSURE:
GRAPPLE ROTATE PRESSURE:
GRAPPLE ROTATE PRESSURE:
Continuous Rotation Grapples:
Continuous Rotation Grapples:
Continuous Rotation Grapples:
Continuous Rotation Grapples:
Continuous Rotation Grapples: ................................................
................................................
................................................
................................................
................................................ 1500 P.S.I. and is set at the cushion valve on
the grapple motor.
Non-continuous Rotation Grapples:
Non-continuous Rotation Grapples:
Non-continuous Rotation Grapples:
Non-continuous Rotation Grapples:
Non-continuous Rotation Grapples: .........................................
.........................................
.........................................
.........................................
......................................... 1500 P.S.I. and is set at the cushion valve on
the grapple.
THE SWING SYSTEM:
THE SWING SYSTEM:
THE SWING SYSTEM:
THE SWING SYSTEM:
THE SWING SYSTEM:
For machines with Sundstrand MDT46 swing pump:
For machines with Sundstrand MDT46 swing pump:
For machines with Sundstrand MDT46 swing pump:
For machines with Sundstrand MDT46 swing pump:
For machines with Sundstrand MDT46 swing pump:
High Pressure Reliefs .................................................................. 3000 PSI Right
.................................................................................................... 3000 PSI Left
For machines with Sundstrand 90 series swing pump:
For machines with Sundstrand 90 series swing pump:
For machines with Sundstrand 90 series swing pump:
For machines with Sundstrand 90 series swing pump:
For machines with Sundstrand 90 series swing pump:
High Pressure Reliefs .................................................................. 3600 PSI Right
.................................................................................................... 3600 PSI Left
CHARGE PRESSURE:
CHARGE PRESSURE:
CHARGE PRESSURE:
CHARGE PRESSURE:
CHARGE PRESSURE:
Charge pressure varies depending upon which Swing Pump is used on your machine. Consult the
factory or dealer for this information.
THE SERVO SYSTEM:
THE SERVO SYSTEM:
THE SERVO SYSTEM:
THE SERVO SYSTEM:
THE SERVO SYSTEM:
At the Servo Relief Valve ............................................................. 500 P.S.I.
