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Post by tommya11en on Sept 23, 2021 0:05:18 GMT
Have a CK-3 compressos that stopped cooling. Wouldn't build high side pressure. I could here a hissing sound inside the compressor. Cut it open today and found that when I blocked the outlet line air would start coming out of an 1/8" hole in the bottom chamber of the muffler. It has a small sharp edged piece sticking out of the hole. Its stuck in there the hole is round so I'm wondering if its something they changed on late model units. Haven't taken the muffler off yet just curious if anyone else has ran into this situation.
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Post by ChrisJ on Sept 23, 2021 2:42:12 GMT
Have a CK-3 compressos that stopped cooling. Wouldn't build high side pressure. I could here a hissing sound inside the compressor. Cut it open today and found that when I blocked the outlet line air would start coming out of an 1/8" hole in the bottom chamber of the muffler. It has a small sharp edged piece sticking out of the hole. Its stuck in there the hole is round so I'm wondering if its something they changed on late model units. Haven't taken the muffler off yet just curious if anyone else has ran into this situation. I don't see how the exhaust muffler could have any holes leading to the compressor dome. Only the intake muffler should be connected to that area. |
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Post by tommya11en on Sept 23, 2021 3:03:49 GMT
I posted a separate pic. Of the bottom of the muffler, I used a mirror to get a pic. This is the high pressure side so it makes no sense having an opening in it.
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Post by tommya11en on Sept 23, 2021 12:56:09 GMT
Have a CK-3 compressos that stopped cooling. Wouldn't build high side pressure. I could here a hissing sound inside the compressor. Cut it open today and found that when I blocked the outlet line air would start coming out of an 1/8" hole in the bottom chamber of the muffler. It has a small sharp edged piece sticking out of the hole. Its stuck in there the hole is round so I'm wondering if its something they changed on late model units. Haven't taken the muffler off yet just curious if anyone else has ran into this situation. I don't see how the exhaust muffler could have any holes leading to the compressor dome. Only the intake muffler should be connected to that area. Attachments:
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Post by tommya11en on Sept 23, 2021 13:05:46 GMT
i agree completely. doesen't made any sense. i added a picture of it . used a mirror to get a good pic. of it . i'm wondering when they made these parts they made them like knock outs in an electrical box ? the 2 above should have a small hole in each of them bot not the bottom one. only problem with that is the p[art sticking thru the hole is jagged. ill take it off today and do some research on it .
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Post by tommya11en on Sept 24, 2021 2:21:06 GMT
Have a CK-3 compressos that stopped cooling. Wouldn't build high side pressure. I could here a hissing sound inside the compressor. Cut it open today and found that when I blocked the outlet line air would start coming out of an 1/8" hole in the bottom chamber of the muffler. It has a small sharp edged piece sticking out of the hole. Its stuck in there the hole is round so I'm wondering if its something they changed on late model units. Haven't taken the muffler off yet just curious if anyone else has ran into this situation. |
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Post by tommya11en on Dec 1, 2021 3:42:04 GMT
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Post by coldspaces on Dec 2, 2021 4:31:39 GMT
The hole was maybe a controlled way to let oil drip out of the muffler.
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Post by turbokinetic on Dec 4, 2021 14:23:53 GMT
The hole was maybe a controlled way to let oil drip out of the muffler. Have you looked in the manual? I haven't yet but wondering if they show a cutaway? Could be a float-operated oil trap like we see on ultra-low-temp systems to keep oil out of the evaporator? |
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Post by ChrisJ on Dec 6, 2021 13:06:50 GMT
The hole was maybe a controlled way to let oil drip out of the muffler. Have you looked in the manual? I haven't yet but wondering if they show a cutaway? Could be a float-operated oil trap like we see on ultra-low-temp systems to keep oil out of the evaporator? I had looked a while back and didn't notice anything. They show a cutaway of the old and newer style mufflers, but it's not very descriptive. I don't see how the discharge muffler could have an 1/8" hole in it and function at all, unless like you said there was some kind of automatic control to block it most of the time. Attachments:
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Post by turbokinetic on Dec 6, 2021 14:41:37 GMT
Have you looked in the manual? I haven't yet but wondering if they show a cutaway? Could be a float-operated oil trap like we see on ultra-low-temp systems to keep oil out of the evaporator? I had looked a while back and didn't notice anything. They show a cutaway of the old and newer style mufflers, but it's not very descriptive. I don't see how the discharge muffler could have an 1/8" hole in it and function at all, unless like you said there was some kind of automatic control to block it most of the time. I have a feeling the muffler in Tommy's CK had failed in some manner. The hole shown in his picture looks similar to the right-most 1937 muffler design, but somewhat different. His has the hole, plus that part in the hole which looks like it is broken in some way. It may have been one of GE's "better ideas" that isn't in the manual, and was only used for a short time. Another possibility is that the muffler had been soldered over on that hole, as part of the manufacturing process; and then the machine overheated to the point the solder came off; such as could happen if it had a suction-side leak and took on massive amounts of air. It could have melted that solder. I recently got a CK30B which has some sort of internal hissing noise I can't identify. However, mine cools flawlessly. I tend to blame the noise on the unusually cold temperature we had while I was working on it, and haven't run it since the weather has warmed up. If it doesn't cool well in warmer temperatures; and the noise continues, I may be facing the same repair. |
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Post by tommya11en on Dec 7, 2021 2:07:25 GMT
I think a broken piece of metal somehow got in the muffler during manufacture. Can't see any other way it could have gotten in there. Possible that it migrated down from the top chamber of the muffler but i don't think it could have gotten in there from the outside of the muffler.I'll post a picture of the metal piece that came out. Should have put some reference next to it but its on a 8-1/2 × 11 piece of paper. I think its a piece of a broken needle valve but who knows. My theory is it was there since manufacture and wore a hole thru the thin wall bottom of the muffler right where the hole in the backing washer is. I think the thicker washer on the bottom was to support the thin floor of the muffler. Why it has a hole in the center ? Who knows. There's nothing mechanical at the hole that the metal wore thru.
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Post by tommya11en on Dec 7, 2021 2:11:50 GMT
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