Symptom Tree t009
| Cause | Correction |
|---|
|
Air governor is malfunctioning or not set correctly |
Check the air governor for correct operation. Make sure the air governor is located less than 0.6 m [2 ft] from the air compressor. Refer to Procedure 012-017. |
 |
|
Unloader valve is malfunctioning |
Check the unloader valve and unloader body seal. Refer to Procedure 012-013. |
|
|
Air compressor intake or exhaust valve leaks air |
Inspect the air compressor intake and exhaust valve assemblies. Refer to Procedure 012-103, 012-104, or 012-106. |
|
|
Air compressor is excessively worn or internally damaged |
Replace or rebuild the air compressor. Refer to Procedure 012-014 and the Master Repair Manual for Holset Air Compressors, Bulletin 3666121. |
|
|
Cover gasket is ruptured (Holset® SS models only) |
Check the discharge line for blockage. Refer to Procedure 012-103, 012-104, or 012-106. Check the cover gasket for flatness. Replace the cover gasket. |
|
|
Splined drive coupling or gear is excessively worn |
Check the coupling for wear. Refer to Procedure 012-014. |
