SENSOR GP-PRESSURE 1999702 - Caterpillar

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Main control valve (3) Rod end line relief valve for the tilt cylinderTest Procedure
Testing Line Relief Valves (Tilt)
Ensure that the temperature of the hydraulic oil is at the normal operating temperature of approximately 54 to 70°C (129 to 158°F).
Enter the Implement Hydraulic Service Mode.ReferenceFor additional information about this mode, refer to the Service Manual module Testing and Adjusting, "Implement Hydraulic Service Mode".
Run the engine at high idle with the transmission in NEUTRAL. Note the steady state engine rpm.Note: Do not keep the tilt control lever in the TILT BACK position for more than 5 seconds while the pressure is at the relief setting.
With the engine speed at high idle, fully extend the tilt cylinder and hold the work tool in the full TILT BACK position.
Note the steady state engine rpm.Note: Once the engine rpm has stabilized, the engine rpm should agree with the reading that was noted in Step 3 within 15 rpm.If the engine rpm does not agree with the value in Step 3, release the hydraulic pressure and replace the tilt back line relief valve. Refer to the Service Manual module Testing and Adjusting, "System Pressure - Release".Note: Installation torque for a new line relief valve is 203 8 N m (150 6 lb ft).If the engine rpm agrees with the value in Step 3, proceed to testing the dump line relief valve.Note: Do not keep the tilt control lever in the full DUMP position for more than 5 seconds while the pressure is at the relief setting.
With the engine speed at high idle, fully retract the tilt cylinder and hold the work tool in the full DUMP position.
Note the steady state engine rpm.Note: Once the engine rpm has stabilized, the engine rpm should agree with the reading that was noted in Step 3 within 15 rpm.If the engine rpm does not agree with the value in Step 3, release the hydraulic pressure and replace the dump line relief valve. Refer to the Service Manual module Testing and Adjusting, "System Pressure - Release".Note: Installation torque for a new line relief valve is 203 8 N m (150 6 lb ft).If the engine rpm agrees with the value in Step 3, proceed to testing the auxiliary line relief valve, if equipped.Testing Line Relief Valves (Auxiliary)
Illustration 4 g02935378
Articulation hitch (Right side view)Location of the remote pressure tap
Install the 8T-0852 Pressure Gauge from the 1U-5481 Pressure Gauge Group or 198-4240 Digital Pressure Indicator to the pressure tap. The pressure tap is located on the right side of the machine on the non-engine end frame near the articulated hitch.
Ensure that the temperature of the hydraulic oil is at the normal operating temperature of approximately 54 to 70°C (129 to 158°F).
Enter the Implement Hydraulic Service Mode.ReferenceFor additional information about this mode, refer to the Service Manual module Troubleshooting, Testing and Adjusting, "Implement Hydraulic Service Mode".
Run the engine at low idle with the transmission in NEUTRAL.
Place the auxiliary control lever in the full FORWARD position.
Observe the