Symptom Tree t006
| Cause | Correction |
|---|
|
Carbon buildup is excessive in the air discharge line, check valve, or cylinder head |
Check for carbon buildup. Replace the air compressor discharge line, if necessary. Check the turbocharger for oil leaks. Check the intake tube for oil. Refer to Procedures 012-003 and 010-033. |
 |
|
Air compressor is sending air pulses into the air tanks |
Install a ping tank between the air dryer and the wet tank. Refer to the manufacturer’s instructions. |
|
|
Accessory drive is worn (axial end play is out of specification) |
Check the accessory drive axial end play. Inspect the shaft for wear. Refer to Shop Manual, M11 Series Engines, Bulletin 3666075. |
|
|
Air compressor timing is not correct |
Check the air compressor timing. Refer to Procedure 012-014. |
|
|
Air compressor drive gear or engine gear train is worn or damaged |
Inspect the accessory drive gears and gear train. Refer to Procedures 001-036, 001-039, and 001-040. |
|
|
Ice buildup in the air system components |
Check for ice in low spots of the air discharge line. |
|
|
Pin bore wear is excessive |
Check for pin bore wear. Refer to Procedure 012-010. |
|
|
Air compressor is excessively worn or internally damaged |
Replace or rebuild the air compressor. Refer to Procedure 012-014. |
