Symptom Tree t007
| Cause | Correction |
|---|
|
Lubricating oil drain interval is excessive |
Verify the correct lubricating oil drain interval. Refer to the correct operation and maintenance manual. |
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|
Air compressor is excessively worn or internally damaged |
Replace or rebuild the air compressor. Refer to Procedure 012-014. Refer to the manufacturer’s instructions. |
|
|
Lubricating oil drain line is restricted |
Remove the air compressor and check the oil drain holes in the air compressor and the accessory drive. Refer to Procedure 012-014. |
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|
Air compressor runs hot |
If coolant temperature is above normal, refer to the Coolant Temperature Above Normal — Gradual Overheat symptom tree. |
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|
Lubricating oil pressure is above specification |
Check the oil pressure. Refer to Procedure 007-028. |
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|
Crankcase pressure is excessive |
Check for excessive blowby. Refer to Section 14. Refer to the Crankcase Gases (Blowby) Excessive symptom tree. |
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|
Air compressor pumping too high air pressure |
Check the air governor for correct operation. Refer to Procedure 012-017. |
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|
Engine angularity during operation exceeds specification |
Refer to the Engine Specification data sheet. |
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|
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. |
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|
Air dryer desiccant cartridge needs replaced |
Replace the desiccant cartridge on the air dryer (if equipped). Refer to the OEM service manual. |
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|
Contaminants are building up in the system reservoirs |
Drain the reservoirs daily. Refer to the Operation and Maintenance Manual ISM and ISMe Series Engines, Bulletin 3666319. |
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|
Air intake system restriction to air compressor is excessive |
Replace the air compressor air cleaner (if installed). Check the air intake piping. Check engine air intake restriction if the air compressor inlet is plumbed to the vehicle or equipment intake system. Refer to Procedure 010-031. |
