WIRING GP-FRONT 4185125 - Caterpillar

Probable Causes
Leaks in the core of oil cooler
Leaks in the core of the NRS cooler
Leaks in the cylinder head gasket
Cracks in the cylinder head
Cracks in the cylinder blockRecommended Actions
Table 1
Troubleshooting Test Steps Values Results
1. Leaks in the Cooling System
A. Pressurize the cooling system. Refer to Systems Operation/Testing and Adjusting, "Cooling System - Test".
Leaks
Result: The test indicates a drop in pressure.
If there are no external leaks, there may be an internal leak.
Make any repairs, as required.
Result: The test indicates that there is not a drop in pressure.
Proceed to Test Step 2.
2. Leaks in Core of Oil Cooler
A. Check for leaks in the oil cooler core. Refer to Systems Operation/Testing and Adjusting, "Exhaust Cooler (NRS) - Test".
Oil cooler
Result: The oil cooler is leaking.
Repair or replace the oil cooler.
Result: The oil cooler is not leaking.
Proceed to Test Step 3.
3. Leaks in the Cylinder Head Gasket
A. Inspect the cylinder head gasket for leaks.
Head gasket
Result The cylinder head gasket is leaking.
Replace the cylinder head gasket.
Result The cylinder head gasket is not leaking.
Proceed to Test Step 4.
4. Cracks in the Cylinder Head
A. Check for cracks in the cylinder head.
Cylinder head
Result The cylinder head is damaged.
Repair or replace the damaged cylinder head.
Result The cylinder head is not damaged.
Proceed to Test Step 6.
5. Cracks in the Cylinder Block
A. Inspect the cylinder block for cracks.
Cylinder liner
Result The cylinder block is cracked.
Repair or replace the damaged cylinder block.
Complete the procedure in the order in which the steps are listed.