PLATE 2478725 - Caterpillar

Illustration 5 g03814437
Pump compartment
(3) Pressure tap (delivery pressure for drive pump)
(4) Pressure tap (delivery pressure for idler pump)
Attach 41,368 kPa (6,000 psi) pressure sensors to pressure taps (3) and (4) for delivery pressure of the main pumps.
Start the engine.
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). Calibration Procedure
To prevent personal injury or equipment damage from failure of the hydraulic test equipment or associated circuit components because of blocked pump flow, make sure that the test equipment valves are fully open before starting the engine.
To prevent personal injury and/or equipment damage from failed lines or components while the hydraulic test equipment is returned to the open flow position, slowly open the hydraulic test equipment valve while monitoring the pump flow.If pump flow does not increase as the valve is opened, shut the engine off and determine what is preventing the pump from upstroking.
Use any of the following control inputs (A) shown in Illustration 6 to calibrate the PHMV.
Illustration 6 g03366023
Electric Control Inputs for extension of the attachment control valve
(LJ) Left-hand joystick
(RJ) Right-hand joystick
(A) Thumb wheel (Forward)
(A) Switch
Select the work tool that will be attached to the machine. The Variable Relief Valve #1 pressure setting must be set to 40000 kPa (5802 psi) for the work tool within the monitor. Reference: Refer to Testing and Adjusting, "Work Tool - Select" for the Tool Control System.Reference: Refer to Testing and Adjusting, "Work Tool Parameter - Program" for the Tool Control System.Monitor Procedure
The following procedure will allow the user to calibrate the flow limit valves using the monitor.
Enter the service mode. Input the password "9992".
Illustration 7 g03643370
Select "Attachment Valves" from the "Calibrations" menu.
Illustration 8 g03643571
Select "Atch Valve #1 Ext Press" from the "Attachment Valves" menu.
Press the OK key in order to start the calibration. The engine RPM will automatically increase to the equivalence of engine speed dial 10.
Confirm the notes on the monitor display. Set up the test conditions in accordance with the instructions. Press the OK key.
Illustration 9 g02283033
Portable hydraulic tester (flow meter)
(5) Load valve
Illustration 10 g03643347Note: Refer to Illustration 6 for the control input.
Press and hold the control input for activation of the work tool to the FULL ON position during calibration. Note: Use the arrows to scroll down to view the machine "Engine Speed", "Hydraulic Oil Temperature", "Pump #1 Outlet Pressure", and "Pump #2 Outlet Pressure".
Set the main pump pressure using load valve (5) on the flow meter to 25000 kPa (3626 psi). Note: Press the left arrow on the monitor to decrease the slope value. This action will increase the amount of flow to the work tool.Note: Press the right arrow on the monitor to increase the slope value. This action will decrease the amount of flow to the work tool.
Use the arrows to adjust the flow until the flow reading for the flow limit valve is at 200