VALVE GP-BANK 3 2479656 - Caterpillar

Test Procedure
Start the engine.
Select a work tool to meet the following conditions.
Two-way flow from one pump
Variable relief valve pressure set at the default specifications of 40,000 kPa.Refer to Testing and Adjusting, "Work Tool - Select" for the Tool Control System.
Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF. Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Increase the hydraulic oil temperature to 50° 10°C (122° 18°F).
Enter the service mode.
Input the password "9992".
Select "Override Parameters".
Illustration 7 g02731140
Highlight "Power Shift Pressure" and press the OK key. Set the power shift pressure to the specification. Refer to Table 1 for the pressure specification. Confirm the power shift pressure setting at pressure tap (3).
Illustration 8 g02292254
Control Inputs for attachment control valves extended.
(LJ) Left-hand joystick
(RJ) Right-hand joystick
(A) Thumb wheel (Forward)
(A) Switch
(FP) Electric foot pedal
(A) Pedal (Forward)
(FS) Foot switch
(A) Foot switch (ON)
Illustration 9 g02292257
Control Inputs for attachment control valve retracted.
(LJ) Left-hand joystick
(RJ) Right-hand joystick
(B) Thumb wheel (Backward)
(FP) Electric foot pedal
(B) Pedal (Backward)
Operate the control input in the appropriate direction in order to relieve the valve.Note: A continuous relief of the valve for more than 10 seconds is not allowed.
Check the main relief valve pressure setting at pressure tap (1) or pressure tap (2). Refer to Table 1 for the pressure specifications of the line relief valves.
Return the device for activation to the NEUTRAL position.Adjustment Procedure
Attachment Control Valves Extend
Table 4
Attachment Control Valve Extend
Model 314E CR
Power shift pressure 2800 50 kPa (406 7 psi)
Engine speed Speed Dial "10"
AEC switch OFF
Relief pressure setting 32000 + 1500 - 1000 kPa (4641 + 218 - 145 psi)
Torque for locknut 27 1.5 N m (19.9 1.1 lb ft)
Illustration 10 g03056220
Line relief valve for extension of the attachment control valves (typical example)
To adjust the line relief valve pressure setting, operate the control input for extension of the attachment control valves to the FULL position and hold. Refer to Illustration 8 for the control input.
Check the pressure reading at pressure tap (1).
Return the control input to the NEUTRAL position.
The pressure reading should be within the specification. Refer to Table 4. If the pressure reading at pressure tap (1) is not within the specification, adjust the line relief valve.
In order to adjust the line relief valve, loosen the locknut on the line relief valve. Turn the adjustment screw until the pressure reading at pressure tap (1) is within the specification. Refer to Table 4.Note: Turn the adjustment screw clockwise in order to increase the pressure. Turn the adjustment screw counterclockwise in order to decrease the pressure.Note: Always make final pressure adjustment on pressure rise.
Tighten the locknut on the line relief valve.Attachment Control Valves Retract
Table 5
Attachment Control Valve Retract
Model 314E CR
Power shift pressure 2800 50 kPa (406 7 psi)
Engine speed Speed Dial "10"
AEC switch OFF
Relief pressure setting 32000 + 1500 - 1000 kPa (4641 + 218 - 145 psi)
Torque for locknut 27 1.5 N m (19.9 1.1 lb ft)
Illustration