| Correct AC compressor [message #320056] |
Thu, 06 July 2017 10:57  |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
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Hi guys--I haven't posted for a long time due to being super busy and playing with other projects. However, I've been enjoying my 78 GMC and conducted a fair amount of maintenance on it recently. Over the 4th weekend, I took the coach to one of our reservoirs (lake Roosevelt) for some overdue camping. The trip went fine until I got stuck in the sand at the camping spot. While trying to get pulled out, my ignition switch crapped out and I couldn't move it to the start position. I had to force it with a pair of pliers and was able to start it. Then my AC compressor started making a terrible rattling. Since all of this was happening while I had 2 trucks trying to pull me out of the sand, my only thought was to keep it running and get to a spot where I could camp. It looks like the AC clutch is coming apart and until I get the compressor out I can't really see what has happened. I had to cut the belt to stop the rattling and severe vibration even with the AC turned off. The hub of the compressor turns easily by hand. I can replace the clutch but frankly that compressor is probably at least 30 years old so I plan on replacing the whole thing. I want to stick with a DA6 but I'm wondering what P/N. I assumed it is the same as a 1978 Toronado, but the Interchange manual has different part numbers that do not cross to the Toronado. I crossed the original 1131953 number and came up with yet another reference that doesn't match any of the others.
Does anyone have a clue what the difference may be between the GMC and Toronado? The pulley diameters all seem to be the same so maybe it is a difference in pulley offset or hose manifold configuration.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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