BIT AS-CUTTING 8E9087 - Caterpillar

Required Tools
Illustration 1 g02571852
Tooling group "A"
198-4240 Digital Pressure Indicator Gp
Table 1
Tool Item Qty Part Number Description
A 198-4240 Digital Pressure Indicator Gp
A1 1 198-4234 Indicator
A2 2 198-4237 Pressure Sensor 3447 kPa (500 psi)
A3 2 198-4236 Extension Cable Machine Preparation
The following procedures must be completed before performing the calibration.
Set the pilot pressure to the specifications in Testing and Adjusting, "Relief Valve (Pilot) - Test and Adjust" for the machine.
Calibrate the power shift pressure. Refer to Testing and Adjusting, "Solenoid Valve (Proportional Reducing) - Calibrate (Power Shift Pressure)" for the machine.
Position the machine on level ground and stop the engine.
Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "System Pressure - Release".
Illustration 2 g03412690
Pressure taps for the proportional reducing valves (negative flow control)
(1) Pressure tap for "NFC1"
(2) Pressure tap for "NFC2"
Connect two 3447 kPa (500 psi) pressure sensors to the pressure taps on the proportional reducing valves for negative flow control. The proportional reducing valve pressure taps for negative flow control of the drive pump and idler pump are located in the pump compartment.
Start the engine.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
Place the hydraulic activation lever in the UNLOCK position. Calibration Procedure
Note: This procedure is typical for both proportional reducing valves for negative flow control.
Enter the service mode. Input the password "9992".
Illustration 3 g02540004
Select "Main Pump Flow Limit" from the "Calibrations" menu.
Illustration 4 g02540097
Select "NFC (Press Gauge Method)" for the appropriate valve from the "Main Pump Flow Limit" 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.
Move the joystick for STICK OUT to the full out position and hold the joystick in this position. Note: If necessary, a BOOM RAISE function may be performed in place of STICK OUT.
Illustration 5 g02540199
Use the arrows to adjust the pressure until the pressure reading for the negative flow control valve is at 1500 50 kPa (218 7 psi). Press the OK key. 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".
Move the joystick for STICK OUT to the NEUTRAL position.
Confirm notes on the monitor display. Set up the test conditions in accordance with the instructions. Press the OK key.
Move the joystick for STICK OUT to the full out position and hold the joystick in this position. Note: If necessary, a BOOM RAISE function may be performed in place of STICK OUT.
Illustration 6 g02540267
Use the arrows to adjust the pressure until the pressure reading for the negative flow control valve is at 3000 50 kPa (435 7 psi). Press the OK key. 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".
Move the joystick for STICK OUT to