SPRING (3) PINK AND (1) WHITE STRIPE 6N8157 - Caterpillar

Use this procedure in order to troubleshoot a high aftercooler coolant temperature. Or, use this procedure if one of the following event codes is active.
Table 1
Event Code
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. 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.
Engine Logged or Active Codes
Result: A diagnostic code is present.
Repair:Troubleshoot any codes before continuing with this procedure. Reset the histogram.
Verify that the repair eliminated the problem.
Result: A diagnostic code is not present.
Proceed to Test Step 2.
2. Coolant level for the SCAC
A. Inspect the coolant level.
Coolant level
Result: The coolant level is OK.
Proceed to Test Step 3.
Result: The coolant level is OK.
Repair:Add coolant.
Verify that the repair eliminated the problem.
3. 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.
Check the cooling system for combustion gases and inspect the cylinder liners for cracks.
Leakage
Result There is no leakage and the cylinder liners are OK.
Proceed to Test Step 5.
Result There is leakage and/or the cylinder liners are damaged.
Repair:Repair any leaks immediately. Replace any damaged cylinder liners.
Verify that the repair eliminated the problem.
5. Damage to the SCAC Piping
A. Perform a visual inspection of the piping for the SCAC system. Look for