ELECTRONICS GP-MONITOR 3552796 - Caterpillar

Install a 40000 kPa (5800 psi) pressure gauge at pressure tap (QQ) on high pressure screen (RR) in order to measure the pressure in the swing system.
Illustration 76 g00827164
The swing dual pressure relief valve is located under the floor grate beneath the ladder. (TT) Swing dual pressure relief valve
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Swing Dual Pressure Relief Valve (UU) Valve spool for the acceleration pressure in the swing system (VV) Shims for setting the acceleration pressure of the swing system (WW) Valve spool for the deceleration pressure of the swing system (XX) Shims for setting the deceleration pressure of the swing system
Loosen the locknuts on the adjusting screws of the high cutoff pressure on the control valve for the swing pump regulator. Turn the adjusting screws for the high pressure two turns clockwise. Tighten the locknuts.Acceleration Pressure Setting
Illustration 78 g00806827
Remove the inlet hose and the outlet hose from the swing solenoid valve. Use union (67) and two O-ring seals (37) to connect the hoses together.
Start the engine.
Warm the oil to a minimum temperature of 50 °C (122 °F). Refer to the Testing and Adjusting, "General Information" for the proper procedure for warming the hydraulic oil.
Set the throttle switch to position 10.
Slowly actuate the swing control to the full left position or the full right position in order to stall the swing motors against the swing brakes. This checks the acceleration pressure setting of the swing dual pressure relief valve. Record the pressure that is indicated by the gauge that is installed on the pressure tap. The acceleration pressure setting for the swing system should be 35000 1000 kPa (5080 145 psi).
Remove the cover. Add or remove shims in order to adjust the pressure. Each 0.13 mm (0.005 inch) shim will change the pressure setting by 210 kPa (30.5 psi).
Reconnect the inlet hose and the outlet hose to the correct positions on the solenoid.Deceleration Pressure Setting
Illustration 79 g00824180
Disconnect the connector that is between the wiring harness and the solenoid valve.
Start the engine.
Warm the oil to a minimum temperature of 50 °C (122 °F). Refer to the Testing and Adjusting, "General Information" for the proper procedure for warming the hydraulic oil.
Set the throttle switch to position 10.
Slowly actuate the swing control to the full left position or the full right position in order to stall the swing motors against the swing brakes. This checks the deceleration pressure setting of the swing dual pressure relief valve. Record the pressure that is indicated by the gauge that is installed on the pressure tap. The swing deceleration pressure should be 28500 1000 kPa (4135 145 psi).
Remove the cover. Add or remove shims in order to adjust the pressure. Each 0.13 mm (0.005 inch) shim will change the pressure setting by 210 kPa (30.5 psi).Note: After completion of the steps for adjustment of the swing dual pressure relief valve, reconnect the connector between the wiring harness and the solenoid valve. Reset the adjustment of the high pressure cut for the swing pump. Also reconnect the brake release