VALVE GP-SOLENOID 3888508 - Caterpillar

Table 1
"Relief Valve (Swing) - Test and Adjust"    
Date     Machine Serial Number    
Machine Settings     Engine Speed    
Engine speed dial "10"
AEC switch OFF
Item     Specification     Actual    
Right Swing    
29400 + 1000 - 1500 kPa (4250 + 145 - 218 psi)        
Left Swing    
29400 + 1000 - 1500 kPa (4250 + 145 - 218 psi)        
Position the machine on level ground.
Stop the engine.
Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release".
Illustration 1 g01445475
Pump compartment (1) Pressure tap (delivery pressure for drive pump) (2) Pressure tap (delivery pressure for idler pump) (3) Pressure tap (power shift pressure)
Connect a 60000 kPa (8700 psi) pressure gauge to pressure tap (2) .
Illustration 2 g01638336
Pilot oil manifold (4) Connector (5) Swing brake solenoid valve
Disconnect connector (4) from swing brake solenoid valve (5) .
Start the engine.
Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF.ReferenceRefer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Move the swing joystick slowly and ensure that the swing parking brake is operating properly.
Illustration 3 g01638337
Swing motor (6) Adjustment plug (7) Locknut (8) Relief valve (right swing) (9) Adjustment plug (10) Locknut (11) Relief valve (left swing)
Slowly move the swing joystick for a full SWING RIGHT operation and check the pressure for relief valve (8) at pressure tap (2) .
Return the swing joystick to the NEUTRAL position.
The pressure setting of the swing relief valve is 29400 + 1000 - 1500 kPa (4250 + 145 - 218 psi). If the pressure reading at pressure tap (2) is not within the specification, adjust the swing relief valve.
In order to adjust the swing relief valve, loosen locknut (7). Turn adjustment plug (6) until the pressure gauge reading at pressure tap (2) is 29400 + 1000 - 1500 kPa (4250 + 145 - 218 psi).Note: Turning adjustment plug (6) clockwise increases the pressure. Turning adjustment plug (6) counterclockwise decreases the pressure.Note: Always make final pressure adjustments on pressure rise.
Tighten locknut (7) to a torque of 120