GASKET 4L8128 - Caterpillar

Use this procedure in order to troubleshoot a high aftercooler coolant temperature. Also, use this procedure if one of the following diagnostic codes is active.
Table 1
Diagnostic Codes Table    
J1939 Code and Description    Conditions which Generate this Code    System Response    
52-15
Engine Intercooler Temperature : High - least severe (1)     The aftercooler coolant temperature is above the trip point pressure for the programmed delay time.     The code is logged.
The ECM may derate the engine or shutdown the engine.    
52-16
Engine Intercooler Temperature : High - moderate severity (2)    
52-0
Engine Intercooler Temperature : High - most severe (3)    If the engine is shut down due to a high aftercooler temperature, cycle power to the engine ECM in order to restart the engine.Probable Causes
Codes
Coolant level for the Separate Circuit Aftercooler system (SCAC)
SCAC radiator
Leakage in the SCAC system
Piping for the SCAC system
Cooling fan for the SCAC system
Pressure relief valve
SCAC water pumpRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in the order of the listed test steps.
Table 2
Troubleshooting Test Steps    Values    Results    
1. Check for Active Codes and Logged Codes
A. Establish communication between Caterpillar Electronic Technician (ET) and the Electronic Control Module (ECM).
B. Monitor the diagnostic codes on Cat ET. Check for active or logged diagnostic codes. Specifically check for codes that could be associated to high aftercooler temperature. Refer to the histogram information for engine derates in Cat ET.
Note: Wait at least 30 seconds in order for diagnostic codes to become active.
   
Codes
   
Result: A code is active or logged.
Repair: Troubleshoot any codes before continuing with this procedure. Reset the histogram.
Verify that the repair eliminated the problem.
Result: A code is not active or logged.
Proceed to Test Step 2.
   
2. Check the Coolant Level for the SCAC
   
Coolant Level
   
Result: The coolant level is OK.
Proceed to Test Step 3.
Result: The coolant level is NOT OK.
Repair: Add coolant.
Verify that the repair eliminated the problem.
   
3. Inspect the Radiator
A.. Check the radiator fins for dirt, debris, and/or damage.
B. Check for restrictions and internal blockage.
Ensure that the radiator size is sufficient. An undersized radiator does not have enough area for the effective release of heat. An undersized radiator may cause the engine to run at a temperature that is higher than normal. The normal temperature is dependent on the ambient temperature.
   
Radiator
   
Result: The radiator fins are not damaged and the radiator does not have a blockage.
Proceed to Test Step 4.
Result: The radiator fins are damaged and/or there is a blockage.
Repair: Remove any dirt and/or debris, straighten any bent fins and remove any blockage.
Verify that the repair eliminated the problem.
   
4. Leakage in the SCAC System
A. Inspect the coolant for presence of bubbles. Cavitation will reduce the efficiency of the cooling system.
B. Check the cooling system for combustion gases and inspect the cylinder liners for cracks.
   
Leakage
   
Result: No presence of bubbles and the cylinder liners are OK.
Proceed to Test Step 5.
Result: There is leakage and/or the cylinder liners are