SHIM 9S1612 - Caterpillar

Use this procedure in order to troubleshoot a high oil pressure in the electrohydraulic system. Also, use this procedure if one of the following event codes is active or logged.
Table 1
J1939 Code and Description Comments
1762-15
Hydraulic Pressure : High - least severe (1) The pressure sensor for the electrohydraulic actuator system detects pressure greater than 2100 kPa (305 psi) for more than 10 seconds. The engine has been running for at least 5 seconds.
The code is logged. Probable Causes
Codes
Relief valveRecommended Actions
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Look for active codes that are associated with the system for the event code.
Codes
Result: An associated code is active.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: A code is active or logged.
Proceed to Test Step 2.
2. Check the Pressure Relief Valve Setting
Relief Valve
Result: The pressure relief valve setting is OK.
Proceed to Test Step 3.
Result: The pressure relief valve setting is NOT OK.
Repair: Adjust the pressure relief valve. Refer to Testing and Adjusting, "Engine Governing - Adjust" for additional information.
If the problem is not resolved, proceed to Test Step 3.
3. Inspect the Pressure Relief Valve
If the pressure relief valve is dirty, the valve can become stuck. If the pressure relief valve is stuck in the open position, the hydraulic oil pressure will be too low.
A. Check the relief valve that is located on the aftercooler.
B. Check the relief valve that is located on the hydraulic pump for leakage and/or adjustment.
Relief Valve
Result: The pressure relief valves are NOT OK.
Repair: Clean or replace pressure relief valve. Adjust the pressure relief valve, refer to Testing and Adjusting, "Engine Governing - Adjust" for additional information.
Verify that the repair eliminated the problem.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).