VEE BELT SET 3S7520 - Caterpillar

Use this procedure in order to troubleshoot low coolant level or use this procedure if one of the following codes is active. Refer to Troubleshooting, "Event Codes" for information about event codes. Refer to Troubleshooting, "Diagnostic Trouble Codes" for information about diagnostic codes. Access the monitoring system on Caterpillar Electronic Technician (ET) in order to view the current trip points for these codes. For information on the engine monitoring system, refer to Troubleshooting, "Engine Monitoring System".Note: Some of the following codes may not be applicable for certain applications.
Table 1
Diagnostic Trouble Codes
CDL Code J1939 Code Code Description
(code descriptions may vary) System Response
E2143-1 111-17 Low Engine Coolant Level The engine has been running for 60 seconds. The engine coolant level has fallen below the coolant level sensor for the specified delay time.
The code is logged.
E2143-2 111-18 Low Engine Coolant Level The engine has been running for 60 seconds. The engine coolant level has fallen below the coolant level sensor for the specified delay time.
Engine power is derated. The code is logged.
E2143-3 111-1 Low Engine Coolant Level The engine has been running for 60 seconds. The engine coolant level has fallen below the coolant level sensor for the specified delay time.
Engine power is derated. The code is logged. Probable Causes
Low Coolant Level and/or Coolant Leakage
Coolant level sensorRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Low Coolant Level.
A. Inspect the coolant level.
Coolant Level
Result: The engine coolant level is OK.
Proceed to Test Step 7.
Result : The engine coolant level is NOT OK.
Repair : Fill the coolant tank to the proper level if necessary.
Proceed to Test Step 2.
2. Check the Cooling System for Leaks.
Cooling system
Result : The cooling system is OK.
Proceed to Test Step 3.
Result: The cooling system is NOT OK.
Repair: Refer to Systems Operation/Testing and Adjusting, "Cooling System - Test" for the correct procedure. Repair any leaks immediately.
If the problem is not resolved, proceed to Test Step 3.
3. Check the NRS Cooler for Leaks.
NRS Cooler
Result : The NRS cooler is OK.
Proceed to Test Step 4.
Result : The NRS cooler is NOT OK.
Repair : Refer to Testing and Adjusting, "Exhaust Cooler (NRS) - Test".
If the problem is not resolved, proceed to Test Step 4.
4. Check for Air in the Cooling System.
Cooling system
Result : The cooling system is OK.
Proceed to Test Step 5.
Result : There is air in the cooling system.
Repair : Refer to Systems Operation/Testing and Adjusting, "Testing the Cooling System" for the correct procedure.
If the problem is not resolved, proceed to Test Step 5.
5. Check for Leakage at the ARD Nozzle Heater O-rings.
Note : White exhaust smoke would be an indication of leakage past the ARD nozzle heater o-rings.
ARD nozzle heater o-rings
Result : The ARD nozzle heater o-rings are OK.
Proceed to Test Step 5.
Result : The ARD nozzle heater o-ring seals are NOT OK.
Repair : In order to check for leakage at the ARD nozzle heater o-rings, pressurize the cooling system and then remove the ARD head. Inspect