Symptom: | What it may indicate: | What you should do: |
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16.0 Compressor | (a)Compressor leaks air at |
leaks air | connections or ports. |
(b)Compressor unloader mechanism malfunction.
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| Testing for leaks |
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ðCheck for leaking, damaged or defective compressor fittings, gaskets, etc. Repair or replace as necessary.
ðGo to Test 6 on page 30.
ðAn air leak at the head gasket may indicate a downstream restriction such as a freeze- up or carbon blockage and/or could indicate a defective or missing safety valve. Find blockage (go to 9.0(f) for details.) and then replace the compressor. Do not
17.0Compressor (a)Improperly installed plugs or
leaks coolant | coolant line fittings. |
(b)Damaged compressor head gasket.
ðInspect for loose or
ðAn air leak at the head gasket may indicate a downstream restriction such as a freeze- up or carbon blockage and/or could indicate a defective or missing safety valve. Find blockage (go to 9.0(f) for details.) and then replace the compressor. Do not
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| (c) Porous compressor head casting. | ð If casting porosity is detected, replace the | |
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| 18.0 Noisy | (a)Damaged compressor. | ð Replace the compressor. | |
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| compressors only) |
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Other Miscellaneous Areas to Consider
This guide attempts to cover most compressor system problems. Here are some rare sources of problems not covered in this guide:
•Turbocharger leakage. Lubricating oil from leaking turbocharger seals can enter the air compressor intake and give misleading symptoms.
•Where a compressor does not have a safety valve installed, if a partial or complete discharge line blockage has occurred, damage can occur to the connecting rod bearings. Damage of this kind may not be detected and could lead to compressor problems at a later date.
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