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Post by coldspaces on Nov 25, 2016 0:55:56 GMT
Here is the third terminal that looked to be in the best shape. At this point I have removed the electrical connector and nut that holds it on. Also the nut under that that holds the seal in. You must not let the terminal stud twist when you work on these , it may twist off the wire that's connected to the other end. I had to lock two nuts together at the end of the stud to hold it from turning while I broke the final nut loose. Here you see a steel washer with fiber washers behind it and a steel washer behind the fiber ones. Steel washer is removed now. Here is the fiber washers that are still stuck together. It appears that a center insulator went over the stud first before the steel and fiber washers were stacked on. This would be critical at the back washer that is steel. This is the only insulation between terminal and the steel washer that is in contact with the compressor shell. This back washer is normally fiber on most terminals of this type that I remember. It appears that the fiber tube that was slipped over the stud first gets pressed into the seal bore just a bit when its all tightened up. That would makes sense so there is no gap in the insulation at the back steel washer.
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Post by coldspaces on Nov 25, 2016 1:08:47 GMT
Turns out that the third seal was in pretty good shape the rubber was still pretty soft. I would say that with so2 it is best to have glass seals like the monitor tops. If you have one with rubber seals its days could be numbered especially if there is any signs that the so2 has been creeping out. This pics shows the seal out of the 34 Westinghouse on the right and on the left a seal out of a 51 I think Tecumseh although it does not say so. It was in the International Harvester I made new terminal seals for a few years ago. The are very similar except for the back washer is fiber in the IH seal and steel on the Westy. Also the IH seal does not have the apparent extra sleave needed over the stud.
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Post by ckfan on Nov 25, 2016 4:23:32 GMT
Great work Gill. Now we know how these terminals are constructed. Do you think they would hold up better in an R12 system?
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Post by coldspaces on Nov 25, 2016 4:56:47 GMT
Great work Gill. Now we know how these terminals are constructed. Do you think they would hold up better in an R12 system? Yes I think R-12 would be more friendly to the rubber. Would love to know what rubber was used in the So2 terminals.
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Post by Travis on Nov 25, 2016 5:21:01 GMT
I would think that a rubber seal with more mass to it would have helped. I realize that an 82 year old seal is past due for failure.
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Post by ckfan on Nov 25, 2016 16:55:32 GMT
Well, I'm going to cross my fingers and use my Westinghouse today. If I get sent to jail by the EPA you will know that I have my own hole in the ozone.
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Post by coldspaces on Nov 29, 2016 3:36:57 GMT
Here is the unit that blew its charge on Travis. It is now the proud owner of a R12 Westy compressor Travis had saved and a fresh charge of R12 Seems to be working ok but the control has issues that need to be worked out. But its alive again!
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Post by ckfan on Nov 29, 2016 4:39:57 GMT
That's great! Looks like it is happily frosting the whole thing!
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Post by coldspaces on Nov 29, 2016 4:51:57 GMT
Its fan motor was stiff and would not cooperate for a few days. I final got just under 1/2 a zoom spout oiler (2 oz) in it and it suddenly freed up. Now its flying along. They sure did have a lot of felt to soak up and hold oil in these old motors, hasn't leaked out any of what I put in yet.
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Post by elec573 on Dec 8, 2016 5:38:59 GMT
Thanks for posting pitchers Wow that does look nasty It all most looks like what you would see on top of a battery post! Are these terminals easy to get to or are they like GEs buried under neath ?
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Post by coldspaces on Dec 26, 2016 23:47:46 GMT
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Post by coldspaces on Dec 26, 2016 23:55:16 GMT
At that point I decided to look inside of the other compressor that blew in Travis's back room. Turns out that more than one of it's terminals was compromised. I see that the fiber washers and plastic insulator on the inside were dying also. Looks like the only way you would fix theses right is to open up the compressor to replace the studs and all the insulators in the seal. The center part of the seal that the stud goes through is defiantly what went bad. It was very hard but must have been rubbery when new to be able to seal. Oh and the windings show no shorts now that the terminals are out of their bores. Run is a few ohms and start about 24 ohms, real close to what the other one tests.
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Post by Travis on Dec 27, 2016 2:22:26 GMT
In other words, if you have a working Westinghouse of this vintage, love it because it's only a matter of time until it gasses you out.
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Post by ckfan on Dec 27, 2016 2:31:04 GMT
Wow, good investigative work. So as you said, there is not much you can do to prevent it from eventually shorting and or leaking. I hope that the R12 units fare better. That also gives me less hope about the future of the old Frigidaire meter miser compressors. Seems like if the inner insulation goes bad that there isn't much you can do besides a total tear down.
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Post by coldspaces on Dec 27, 2016 2:55:07 GMT
It all depends, if the washers inside stay together it is possible to replace the rest without opening the compressor shell, I did that on the 50s Tecumseh in the IH I rebuilt. Its washers were all fiber,no plastic. I would have to open one of these used on r12 to know just how much better shape the rubber is in, I would guess it would be better but still old.
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