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Post by coldspaces on Sept 18, 2013 0:47:26 GMT
My 1979 book shows your M1A 272 crosses to a Ranco A10-669.Not sure this is still made by Ranco, not much luck finding one on my suppliers web site. Looks like the Robershaw would also be good, it has lots of adapters and the capillary looks to be nickel plated, not sure if the Ranco is.
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Post by k5carrillo on Sept 18, 2013 3:36:26 GMT
So I hooked the relay and compressor back up and powered around the thermostat. She kicked to life just like normal. Compressor sounds normal. So now I just have to order a fan and a thermostat and I'm back in business. Happy Wife....happy life.
The fan is labeled as "5K51AL12B". It also says "1W 110/55V 60Hz 2 phase CW". I have looked for 51 frame fans but I do not find any 1W fans. Seem to start at 2W. I would assume that is OK. What's a Watt, as they say. Any suggestion on the right fan?
I hope to order both parts tomorrow.
Thanks to Coldspaces and Cablehack for all the help. Would not have been brave enough to try fixing this without your help.
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Post by coldspaces on Sept 18, 2013 4:00:36 GMT
Sweet! Glad to hear the compressor started up. Do you have a 2 wire fan or the 3 wire one? I have never seen the 3 wire set up and do not understand it like cablehack may. I think a few modern frig's may have use something smaller than 2 watt but I don't know which ones. The 2 watt will work if you can't find something else. I found this but it is new to me, not sure if they mean one motor fits all from 1 - 9 watts? Never seen a unit bearing motor that was a psc type. Uses the standard mounting pattern so it may fit if it isn't longer. www.fasco.com/products/products/motors/1-9-watt-psc-internal-capacitor-unit-bearing-motor/And you are welcome, glad we can help.
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Post by cablehack on Sept 18, 2013 4:07:56 GMT
I'm curious as to why the fan motor is inoperative, as the windings are continuous. Has the bearing always been oiled? Page 88 of the scotch yoke manual may be of use if the bearing is stuck.
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Post by k5carrillo on Sept 18, 2013 4:29:06 GMT
I have only owned this fridge for about 6 months. Don't know the history. The fan ran when I got it, but after a while it started hitting the fan shroud. The motor has at least 1/4 inch of axial play. I do not see any obvious way to lube it. Due to axial play, the fan blade would hit the shroud...at first just enough to squeak. Later it got to where the drag would stop the motor. After a while it would not run, even if I pushed the blade away from the shroud. I just assume something is burnt up....unless it is possible that when the axial play get large enough the stator and rotor become so far misaligned that it will not run. Don't know if that is even possible. The motor is not bound, just won't run.
Should I just replace it with a PSC fan and hook it to hot/common on the relay? If not, then what?
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Post by cablehack on Sept 18, 2013 4:56:17 GMT
I'd be opening up the motor and examining the bearings or bushings as the case may be. If the armature is off centre it won't run but will rotate freely if you turn it by hand. I doubt the windings are burnt with the resistance values you quoted earlier.
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Post by k5carrillo on Sept 18, 2013 5:34:59 GMT
I know what you mean, but I do not know how to take it apart. Looks to be pressed and sealed. Not sure how to get inside without damaging the case. Ever done it?
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Post by cablehack on Sept 18, 2013 5:58:50 GMT
The only reference I can find to dismantling the motor is for one of the other models which mentions two screws holding the case together. I've opened up plenty of induction motors, but never one of these. It sounds like there's nothing to lose by trying to open it. There could be screws under the fan blade. Can you get the motor out and post some pics? I'm curious to see how it is constructed. If you have to replace it, the new motor would just be connected across the common and run of the compressor motor. The extra current drain is a small fraction of what the compressor draws, so shouldn't interfere with the start relay operation.
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Post by coldspaces on Sept 18, 2013 12:04:17 GMT
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Post by k5carrillo on Sept 18, 2013 13:55:25 GMT
Yep...just like your pics. Fan came off easily. I popped the rear cap off this morning before heading to work. I will dig deeper tonight. Does the rear cap just pop off was well? Your pics were not as clear for the front cap. The felt is totally dry and looks amazingly clean.....almost like it was never lubed to begin with. Thanks again. Attachments:
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Post by coldspaces on Sept 18, 2013 17:27:48 GMT
The front is just pressed on also. You may not have to open the front if the bearings are just stuck. Getting oil in the back may be all you need. Oil it with 20 weight non detergent oil if you can. Or 3&1 oil in a blue can that says 20 weight. Do not use sewing machine oil or wd 40 type stuff.
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Post by k5carrillo on Sept 18, 2013 18:53:07 GMT
I will have to get into the front as my real problem is excessive axial end play. It must be that the forward thrust washer is destroyed.
I'll let you know what I find.
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Post by coldspaces on Sept 18, 2013 22:17:41 GMT
I will have to get into the front as my real problem is excessive axial end play. It must be that the forward thrust washer is destroyed. I'll let you know what I find. Be sure you leave a some axial play when you replace the thrust washer.
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Post by cablehack on Sept 18, 2013 23:23:15 GMT
There may be a modern sealed bearing you could adapt if necessary.
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Post by k5carrillo on Sept 19, 2013 13:23:56 GMT
Ah well....I opened the motor, cleaned it out, reassembled with some nylon spacer washers, and some 3in1 (blue) oil. No joy. It will not run. Don't know why.....don't really care any more. Replacement motors are available and cheap. I will be ordering the motor and thermostat today.
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