VALVE GP-SOLENOID 3100203 - Caterpillar

Illustration 5 g03818750
Main control valve
(3) Line relief valve for the attachment valve extend
(4) Line relief valve for the attachment valve retract
Start the engine.
Select a work tool to meet the following conditions.
Two-way flow
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 hydraulic activation control lever in the UNLOCKED position.
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 55° 5°C (131° 9°F).
Use the monitor to set main relief to the high setting.
Enter the "Service" menu.
Enter password "9992".
Select "Override Parameters".
Set "Heavy Lift Control Solenoid" to "ON".
Illustration 6 g03366023
Control Inputs for attachment control valves extended.
(LJ) Left-hand joystick
(RJ) Right-hand joystick
(A) Thumb wheel (Forward)
(A) Switch
Illustration 7 g03366372
Control Inputs for attachment control valve retracted.
(LJ) Left-hand joystick
(RJ) Right-hand joystick
(B) Thumb wheel (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.
Table 6
Initial Main Relief Setting
Pump #1 Outlet Pressure
Pump #2 Outlet Pressure
Measure and record the high main relief valve setting. Use "Pump #1 Outlet Pressure" and "Pump #2 Outlet Pressure". The high main relief valve pressure setting should be 35000 500 kPa (5076 73 psi).
Illustration 8 g03818803
Main relief valve
(A) Adjustment screw
(L) Locknut Note: A temporary setting of the main relief valve is required before any line relief valves can be adjusted.
Loosen the locknut. Set the main relief pressure to 37500 500