chase
New Member
Posts: 16
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Post by chase on Aug 14, 2022 17:50:29 GMT
Two years ago we bought refurbished Fresenius 2008K machines. They set for a long time before being used. Two of them immediately gave a squeking noise on power up for the first time. They continue to do so. I am wondering whether there is a quick fix for this. They are basically new and worn bearings should be ruled out. Can use of light oil somewhere help?
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Post by gnurk on Aug 15, 2022 11:41:17 GMT
why should the bearings be ruled out just because someone refurbed them dosent mean they replaced the bearings, you can get some oil for small electric motors and try to oil the bearings with just a few drops or you can replace the bearings
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Post by dave74 on Aug 15, 2022 12:45:11 GMT
Are you sure the sound is coming from the motor? Sometimes noises can fool you. I've never replaced bearings in a motor. I just replace them when they go bad.
I would suggest calling the company that refurbished the machines. I know it has been two years, but they might have some experience in dealing with the problem you are describing.
To the best of my knowledge, companies that refurbish machine do not replace motors if the existing motors are good. I could be wrong on that.
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stuff
Full Member
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Posts: 240
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Post by stuff on Aug 15, 2022 13:16:02 GMT
i will add that the bearings on the motors in the machine are press fit and will not come out unless plastic bits are destroyed. A lot of the time for a failed motor is that the bearings are seized from not cleaning the carbon dust out from them. I was going to be all proactive and stuff, with a $10 bearing fix vs $100+ for a new motor, but that ended rather quickly
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Post by lisagalvan on Aug 16, 2022 10:06:58 GMT
Are you sure its the dearation motor and not the infamous loading pressure regulator?
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Post by gnurk on Aug 16, 2022 12:21:51 GMT
you can remove the bearings by squeezing in the tangs on the white assembly that holds the brushes and wires in place then use a socket that fits in the back to push out the bearing, you can buy replacement bearing from any place that sells bearings the number on the fmc bearing can be cross refrenced to bearings sold by a bearing supply company like graingers
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Post by Guest on Aug 17, 2022 13:00:52 GMT
Gnurk, can you show a photo of which tangs to squeeze? I have a motor now with a bad bearing and can't figure out which tangs to squeeze.
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Post by gnurk on Aug 17, 2022 13:25:47 GMT
sorry no i dont have a motor out at this time
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Post by guesttoday on Aug 19, 2022 0:44:55 GMT
I wouldn't change out the bearings until FMC has a "certified" way to do it. Buy new and install. That'd be my recommendation.
It's similar to the old blood pump motors that some people tried/have replaced the brushes in them even though there were no training provided to do the job "properly." 3 years ago?? I think.. They released the new blood pump motors that came with "certified" instructions on how to replace the brushes; actually it's more instructions on how to remove the tach sensor n such w/o damaging the whole thing. The brush installs are the same as the d/f motors.
To me, you could be setting up yourself if anything were to go wrong with the machine. It opens you up for "attacks"
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