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Delphi HT-6 Compressor Clutch Analysis The components of the clutch assembly on the untreated HT-6 compressor display signs of extreme heat caused by the friction between the clutch pulley and the drive plate. Because the refrigerant charge was monitored during the test, loss of refrigerant can be eliminated as a failure cause. A significant increase in internal friction or drag from the compressor can be attributed to the loss of metal on several internal surfaces which was documented by the spectrochemical analysis of the lubricant on the previous page, and microscopic analysis of compressor components on the following page.
In addition to extreme wear on the drive plate and clutch pulley face, the excessive friction and heat contributes to shaft seal failure since the shaft acts as a heat sink for the drive plate. The illustration on the left shows the heat traveling down the shaft and the effect on the shaft seal. Clutch failures and compromised shaft seals are common failures on HT-6 compressors.
The treated compressor which completed the FULL test regime (5 more hours) shows no sign of unusual wear or heat damage. Other
GM HT-6 Tests
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