SEAL-O-RING 0951623 - Caterpillar

Probable Causes
The probable root causes are listed in order below:Note: If the problem is intermittent and the problem cannot be duplicated, refer to Troubleshooting, "Intermittent Low Power or Power Cutout".
Individual cylinder malfunction
Fuel supply
Low injection actuation pressure
Accelerator pedal position sensor
Power train data link
Camshaft position sensor
Valve lashRecommended Repairs
Perform the following diagnostic procedures in order:Note: If the problem only occurs under certain conditions, test the engine under those conditions. Examples of certain conditions are high rpm, full load, and engine operating temperature. Troubleshooting the symptoms under other conditions can give misleading results.Individual Cylinder Malfunction
Check for an individual cylinder malfunction.
Ensure that the hydraulic electronic unit injector connector (J300/P300) is fully connected, Ensure that the connector is free of corrosion.
Ensure that the ECM engine harness connector (J2/P2) is fully connected and ensure that the connector is free of corrosion.
Connect Caterpillar Electronic Technician (ET) to the cab data link connector. Use the Cylinder Cutout Test. Access the Cylinder Cutout Test by selecting the "Diagnostic Menu" and the "Diagnostics Test Menu". Run the Cylinder Cutout Test in order to disable each cylinder. Disabling each cylinder allows the technician to isolate the misfiring cylinders.If the misfiring cylinder can be isolated to a specific cylinder, refer to Troubleshooting, "Injector Solenoid Circuit - Test".Fuel Supply
Monitor the exhaust for smoke while the engine is being cranked.If no smoke is present, there may be a problem with the fuel quality or there may be a problem with the fuel supply.
Check the fuel quality.
Check the fuel pressure. Refer to Testing and Adjusting, "Fuel System Pressure - Test".
Ensure that the fuel system has been primed. Refer to Testing and Adjusting, "Fuel System - Prime".
Check for fuel supply lines that are restricted.
Check the fuel filters.
If the temperature is below 0 °C (32 °F), check for solidified fuel (wax).
Check for air in the fuel system. Refer to Testing and Adjusting, "Air in Fuel - Test".Low Injection Actuation Pressure
Check the engine oil level. Engine oil is used to activate the high pressure hydraulic pump.
Ensure that the engine oil meets the recommendations of the engine manufacturer. Refer to Operation and Maintenance Manual for further details.
Crank the engine and monitor the injection actuation pressure and the output of the injection actuation pressure control valve. The high-pressure oil system is operating properly if the pressure output is a minimum of 6 MPa (870 psi).
Connect ET and check for event code 164-11 Injection Actuation Pressure system fault. If a 164-11 event code has been logged recently, refer to Troubleshooting, "Injection Actuation Pressure System-Test".Accelerator Pedal Position Sensor
If the engine is in the cruise control mode and the problem does not occur, check the