803663 10 Mercury GASKET

Table 1
J1939 Code and Description Comments
1180-0
Turbocharger #1 Turbine Inlet Temperature : High - most severe (3) The exhaust temperature is above the trip point temperature.
The engine is shut down.
The code is logged.
1180-15
Turbocharger #1 Turbine Inlet Temperature : High - least severe (1) The exhaust temperature is above the trip point temperature.
The code is logged.
1180-16
Turbocharger #1 Turbine Inlet Temperature : High - moderately severe (2) The exhaust temperature is above the trip point temperature.
The engine is derated.
The code is logged.
1181-0
Turbocharger #2 Turbine Inlet Temperature : High - most severe (3) The exhaust temperature is above the trip point temperature.
The engine is shut down.
The code is logged.
1181-15
Turbocharger #2 Turbine Inlet Temperature : High - least severe (1) The exhaust temperature is above the trip point temperature.
The code is logged.
1181-16
Turbocharger #2 Turbine Inlet Temperature : High - moderately severe (2) The exhaust temperature is above the trip point temperature.
The engine is derated.
The code is logged.
1184-0
Turbocharger #2 Turbine Inlet Temperature : High - most severe (3) The exhaust temperature is above the trip point temperature.
The engine is shut down.
The code is logged.
1184-15
Turbocharger #2 Turbine Inlet Temperature : High - least severe (1) The exhaust temperature is above the trip point temperature.
The code is logged.
1184-16
Turbocharger #2 Turbine Inlet Temperature : High - moderately severe (2) The exhaust temperature is above the trip point temperature.
The engine is derated.
The code is logged.
1185-0
Turbocharger #2 Turbine Inlet Temperature : High - most severe (3) The exhaust temperature is above the trip point temperature.
The engine is shut down.
The code is logged.
1185-15
Turbocharger #2 Turbine Inlet Temperature : High - least severe (1) The exhaust temperature is above the trip point temperature.
The code is logged.
1185-16
Turbocharger #2 Turbine Inlet Temperature : High - moderately severe (2) The exhaust temperature is above the trip point temperature.
The engine is derated.
The code is logged. Probable Causes
Codes
Light loads
Engine overload
Air/Fuel ratio
Exhaust restriction
Valve lashRecommended 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 for Light Loads
Load
Result: The load factor is OK.
Proceed to Test Step 3.
Result: The load factor is less than 50 percent NOT OK. At loads that are less than 50 percent, the inlet air is controlled by the air choke actuator.
Repair: Correct the air/fuel ratio. Adjust the engine operation according to Testing and Adjusting, "BTU and Precombustion Chamber Adjustments".
If the problem is not resolved, proceed to Test Step 3.
3. Check for Engine Overload
Note: When the load that is applied to the engine is too large, the engine will run in the lug condition. When the engine is running in the lug condition, engine rpm does not increase with an increase of fuel.
Load
Result: The engine is not being overloaded.
Proceed to Test Step 4.
Result: The engine is being overloaded.
Repair: Reduce engine load to an acceptable limit.
If the problem is not resolved, proceed to Test Step 4.
4. Check the Air/Fuel Ratio
Note: An air/fuel mixture that is too rich will increase the exhaust temperature. A change in the fuel energy content will change the air/fuel ratio.
A. Obtain a fuel analysis.
Note: If the quality of the gas is inconsistent, obtain several analyses over a period of time.
B. Enter the data into Caterpillar Software, LEKQ6378, "Methane Number Program".
C. Verify that the fuel supply pressure is adequate and stable.
D. Verify that the exhaust emissions are correct.
Air/Fuel Ratio
Result: The air/fuel ratio is OK.
Proceed to Test Step 5.
Result: The air/fuel ratio is NOT OK.
Repair: Use Cat ET to program the results for the "Fuel Specific Heat Ratio", "Fuel Quality", and "Gas Specific Gravity" parameters. Refer to Systems Operation, "Electronic Control System Parameters" for additional information.
Program the "Fuel Quality" parameter to the average value of the LHV. Adjust the engine operation according to Testing and Adjusting, "BTU and Precombustion Chamber Adjustments".
If the problem is not resolved, proceed to Test Step 5.
5. Check for Exhaust Restriction
Note: A restriction of the exhaust can cause high cylinder temperatures.
A. Measure the exhaust restriction during engine operation with a load. For data that is specific to your engine, refer to the Technical Marketing Information (TMI).
Restriction
Result: The exhaust restriction measures OK.
Proceed to Test Step 6.
Result: The exhaust restriction measurement is NOT OK.
Repair: Determine the reason for high exhaust restriction and repair.
If the problem is not resolved, proceed to Test Step 6.
6. Check the Valve Lash
A. Check the cylinder compression.
Refer to Operation and Maintenance Manual, "Cylinder Pressure - Measure/Record" for additional information.
Valve Lash
Result: The valve lash is NOT OK.
Repair: Reset valve lash. Refer to Testing and Adjusting, "Valve Lash and Valve Bridge Adjustment (Gas Admission Valve Lash)" 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).