PLUNGER 9T4977 - Caterpillar

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Use the arrows to adjust the pressure. Confirm the pressure with the pressure gauge. Note: Use the arrows to scroll down to view the machine "Engine Speed".Cat Electronic Technician Procedure
The following procedure will allow the user to calibrate the proportional reducing valves using the Cat Electronic Technician.
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Diagnostic connector for Cat Electronic Technician
Connect the Cat Electronic Technician to the diagnostic connector located behind the seat on the left side of the cab.
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Start Cat Electronic Technician.
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Select the ECM for "Machine Control".
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Select "Calibrations" from the "Service"menu.
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Highlight "PRV - Attachment Valves Pressure Calibration" and click on the "Start" button in the lower left corner of the screen.
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Select the attachment valves to calibrate and press the "Begin" button.
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Follow the instructions on the screen. Press "Next" button to continue through to the next step.
Press and hold the control input for activation of the work tool to the FULL ON position during the calibration.
Use the arrows to adjust the pressure until the pressure reading is at 500 50 kPa (73 7 psi). Press the device for activation 3 times and release the device for activation 3 times for each adjustment.
Press the "NEXT" button when the pressure reading holds steady at 500 50 kPa (73 7 psi) and no more adjustment is required.
Press and hold the control input for activation of the work tool to the FULL ON position during the calibration.
Use the arrows to adjust the pressure until the pressure reading is at 2500 50 kPa (363 7 psi). Press the device for activation 3 times and release the device for activation 3 times for each adjustment.
Press the "NEXT" button when the pressure reading holds steady at 2500 50 kPa (363 7 psi) and no more adjustment is required.
If the calibration was successful and no errors occurred, the display will indicate that the calibration is complete. Press the "Finish" button to exit or move on to the next calibration.
If the calibration failed, the calibration is not saved. Press the "Restart" button to try the calibration again or press the "Finish" button to exit or move on to the next calibration. Test Procedure
Confirm the calibration using the following procedure.
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Select "Diagnostic Tests" from the "Diagnostics" menu.
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Highlight "Attachment Valves Pressure Test" and click on the "Start" button in the lower left corner of the screen.
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Select the test and press the "Begin" button.
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Follow the instructions on the screen. Press "Start" button in the lower left corner to begin the test.
Use the arrows to adjust the pressure. Confirm the pressure with the pressure gauge.