Join Date: Aug 2018
Location: Fort Worth, Texas, USA
66 AC Fix + Question
My '66 has a factory A/C. I think it is a Tecumseh based on it being cast iron, not aluminum. Last year, it created "cool" air but not "ice cold" so I decided to get it re-charged this spring. A few weeks ago, I gave it a test and noticed smoke at the clutch so I immediately turned it off. Last week I took it to a repair shop, hoping that my problems were due to being low on 134.
They attempted to charge it, but said it was not possible. There was a chirping sound and the compressor wasn't turning freely. For my $40, he diagnosed "your compressor is shot". Walk-out price: $1300.
I got to thinking: compressor not turning could be compressor or it could be the clutch. I turned it on and saw that there were sparks. (see yellow arrows)
I pulled off the clutch. (Remove 1/2" bolt to reveal UNC5/8-11 threads. Thread in a 2" long jack bolt and use a spanner to keep the clutch from moving. The clutch slides right off.) I noticed that the brushes (circled in pic A) hardly extended out of their housing and were gummed with greasy oil. I removed the brushes, dowsed with brake cleaner, and got them freely moving again. I also thoroughly cleaned the brass (?) face that the brushes slide against (pic B). I reassembled, fired it up, and it now works extremely well. Just saved a ton of dough. If your AC isn't working, check the brushes. Make sure that they are clean and make good connection with the clutch.
Now my question:
When I had the clutch off, I noticed that the bearing was a little noisy. It would spin freely, but it should be better. In pic C, you can see my clutch. There is a spring loaded clutch inside the 6" diameter cast iron ring. How do I get the bearing out without pushing out the spring loaded clutch? Is this with properly sized arbor and bushing to only push on the bearing with a press? Anyone have a bearing part number?
Build Date: July 18, 1966
Last edited by 66#3; 05-22-2019 at 11:14 PM.