PROTECTOR 1U4410 - Caterpillar

Probable Causes
Water pump
Engine oil cooler core
Cylinder head gasket
Cylinder head
Cylinder liner
Cylinder blockRecommended Actions
Table 1
Troubleshooting Test Steps Values Results
1. Inspect the Water Pump
A. Check for leaks around the seal of the water pump.
B. Look for damage to:
- The seal
- The impeller shaft
- The impeller shaft bearings
Leak or Damage
Result: The pump is OK.
Proceed to the next step.
Result: The pump is NOT OK.
Repair: Replace the damaged components. Refer to the Disassembly and Assembly manual.
Drain the crankcase and refill the crankcase with clean engine oil. Install new engine oil filters. Refer to the Operation and Maintenance Manual.
If the problem is not resolved, proceed to the next step.
2. Inspect the Engine Oil Cooler Core
A. Check for leaks in the oil cooler core.
Leak
Result: The oil cooler core is OK.
Proceed to the next step.
Result: The oil cooler core is NOT OK.
Repair: Install a new oil cooler core. Refer to the Disassembly and Assembly manual.
Drain the crankcase and refill the crankcase with clean engine oil. Install new engine oil filters. Refer to the Operation and Maintenance Manual.
If the problem is not resolved, proceed to the next step.
3. Check the Cylinder Head Gasket (Integral Seal)
A. Remove the cylinder head. Refer to the Disassembly and Assembly manual.
B. Check the cylinder liner projection. Refer to the Reuse and Salvage Guidelines manual. Damage
Result: The head gasket (Integral Seal) is OK.
Proceed to the next step.
Result: The head gasket (Integral Seal) is NOT OK.
Repair: Install a new cylinder head gasket (Integral Seal). Refer to the Disassembly and Assembly manual.
If the problem is not resolved, proceed to the next step.
4. Inspect the Cylinder Head
A. Inspect the cylinder head for cracks.
Crack
Result: The cylinder head is OK.
Proceed to the next step.
Result: The cylinder head is NOT OK.
Repair: The cylinder head and/or replace the cylinder head. Refer to the Disassembly and Assembly manual.
If the problem is not resolved, proceed to the next step.
5. Inspect the Cylinder Liner
A. Check for cracked cylinder liners.
Crack
Result: The cylinder liners are OK.
Proceed to the next step.
Result: The cylinder liners are NOT OK.
Repair: Replace any cracked cylinder liners. Refer to the Disassembly and Assembly manual.
If the problem is not resolved, proceed to the next step.
6. Inspect the Cylinder Block
A. Inspect the cylinder block for cracks.
Crack
Result: The cylinder block is OK.
Result: The cylinder block is NOT OK.
Repair: Repair the cylinder block or replace the cylinder block.
Verify that the problem has been resolved