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Post by allan on Nov 3, 2013 1:02:08 GMT
I have been watching that great old GE film of an operating DR and decided to see what more I can learn by tearing one down. After watching the film I understand the operation and now know what to look for and where. I pulled the compressor off today and cut open the float assembly. Corrosion was bad and the needle and seat is frozen. Got it soaking in WD 40 hoping I can disassemble and get a close look at needle and seat. Will try to determine the torque on the compressor case bolts and record it for future reassembly of compressors. Will post pics soon
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Post by jhigdon2 on Nov 3, 2013 1:14:47 GMT
Excellent! Can't wait to see them. Notice; There may be a couple of 3/8" NC threaded holes in compressor base. When they have these holes it makes it much easier to remove the base from the can.
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Post by ChrisJ on Nov 3, 2013 13:32:48 GMT
Allan, please take pictures whenever possible. I love seeing the inside of these machines.
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Post by coldspaces on Nov 3, 2013 14:11:58 GMT
Allan, please take pictures whenever possible. I love seeing the inside of these machines. X2 I will be watching also. |
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Post by cablehack on Nov 3, 2013 22:28:55 GMT
Will this be the unit for your capillary & R600a experiment?
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Post by allan on Nov 3, 2013 23:58:09 GMT
Will this be the unit for your capillary & R600a experiment? No this one in bad shape. Just want to use it to learn what I can |
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Post by allan on Nov 4, 2013 0:00:51 GMT
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Post by allan on Nov 4, 2013 0:01:01 GMT
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Post by allan on Nov 4, 2013 0:03:47 GMT
Here is the DR float tank opened up. Nothing interesting about the float so didn't include it. I am amazed that the seat and needle is all steel and after cleaning it still seats shut. If you rotate needle 180 degrees from the way it was originally it leaks!! |
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Post by allan on Nov 4, 2013 0:12:44 GMT
Attachments:
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Post by ChrisJ on Nov 4, 2013 0:18:31 GMT
Wow,
I wonder what a CK uses? It would sure explain everything if a CK is also a steel needle and seat.
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Post by allan on Nov 4, 2013 0:20:50 GMT
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Post by jhigdon2 on Nov 4, 2013 0:32:52 GMT
Excellent pics. Very well built. Mild steel is very compatible with S02 but unfortunately this one had moisture problems in system it looks like. The black sooty stuff in the float chamber seems to be the same looking stuff that I have run into on these. It eventually restricts the seat. On DR's a restricted seat means motor winding failure to follow, if unit isn't serviced.
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Post by cablehack on Nov 4, 2013 0:43:18 GMT
Fascinating pics! In a way it supports my concerns about refilling with SO2 as a DIY exercise, if this is what it does in the presence of moisture. I wouldn't use it now I've seen that.
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Post by ChrisJ on Nov 4, 2013 0:46:03 GMT
Fascinating pics! In a way it supports my concerns about refilling with SO2 as a DIY exercise, if this is what it does in the presence of moisture. I wouldn't use it now I've seen that. Keep in mind, when methyl formate comes in contact with moisture, besides producing NCG it also produces formic acid which is corrosive. |
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