Adnan
New Member
B Braun
Posts: 41
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Post by Adnan on Mar 21, 2023 7:40:40 GMT
Hi I have noticed an issue with the pump magnets, after approximately 15K working hours, the magnets weres out and start producing small black residuals as shown in the attached photos. Happened with five machines until now. Did anyone encounter this issue before?    ![]() |
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Post by Chuck Weddle on Mar 21, 2023 8:31:24 GMT
Yes, its been discussed before... dialysistechnical.freeforums.net/thread/230/black-substance-mystery-solvedThat magnet is supposed to be encased in a stainless steel jacket which appears to be completely gone in your pictures. We've had it happen twice but the jacket was never completely gone, only torn and holes. The strange thing was, the machines passed self-test and performed treatments without problems. They were only removed from service because the staff saw the black substance when stripping down the machines. Do your machines get bleached? |
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Adnan
New Member
B Braun
Posts: 41
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Post by Adnan on Mar 22, 2023 6:52:29 GMT
Yes, its been discussed before... dialysistechnical.freeforums.net/thread/230/black-substance-mystery-solvedThat magnet is supposed to be encased in a stainless steel jacket which appears to be completely gone in your pictures. We've had it happen twice but the jacket was never completely gone, only torn and holes. The strange thing was, the machines passed the self-test and performed treatments without problems. They were only removed from service because the staff saw the black substance when stripping down the machines. Do your machines get bleached? Yes, it has been cleaned. I pulled off some tubes and rinsed them externally after that I did many disinfection as well as thermal cycles. |
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Post by Chuck Weddle on Mar 22, 2023 9:09:05 GMT
Do your machines get bleached? Yes, it has been cleaned. I pulled off some tubes and rinsed them externally after that I did many disinfection as well as thermal cycles. I meant, are your machines routinely disinfected with bleach or anything other than citric/thermal? |
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Adnan
New Member
B Braun
Posts: 41
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Post by Adnan on Mar 22, 2023 10:25:50 GMT
Yes, it has been cleaned. I pulled off some tubes and rinsed them externally after that I did many disinfection as well as thermal cycles. I meant, are your machines routinely disinfected with bleach or anything other than citric/thermal? No, we only use citric/thermal |
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Adnan
New Member
B Braun
Posts: 41
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Post by Adnan on Mar 23, 2023 8:00:21 GMT
Yes, its been discussed before... dialysistechnical.freeforums.net/thread/230/black-substance-mystery-solvedThat magnet is supposed to be encased in a stainless steel jacket which appears to be completely gone in your pictures. We've had it happen twice but the jacket was never completely gone, only torn and holes. The strange thing was, the machines passed self-test and performed treatments without problems. They were only removed from service because the staff saw the black substance when stripping down the machines. Do your machines get bleached? I would like to know if its a production problem or not. Do I have to open a ticket with Bbraun to address the issue cause its only happened with certain pumps |
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Post by Chuck Weddle on Mar 23, 2023 10:26:29 GMT
I would definitely open a PIR ticket. I don't care if a machine even has 100,000 hours on it...the stainless steel coverings on the magnets should not be deteriorating like this.
I don't know if it actually does any good or not because if you even get a "report" of their findings it's always very generic and quite frankly BS. Over the last 12 months, I've filed 16 PIR's and sent 14 failed A/V monitoring boards back to Germany from machines with hours ranging from 1000-2500 hours. I've received 3 "final reports", all 3 of them basically said that a transducer failed and since the machine failed the BS test everything operated properly. Nothing about why 16 have failed on 1-2 year old machines.
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btech
New Member
Posts: 43
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Post by btech on Mar 23, 2023 10:59:19 GMT
just want to mention that this steel covers are gone since they changed to revision L. Revision K had this cover. if your pump is a Rev L it might happen that they disintegrate.
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Post by Chuck Weddle on Mar 23, 2023 11:38:42 GMT
just want to mention that this steel covers are gone since they changed to revision L. Revision K had this cover. if your pump is a Rev L it might happen that they disintegrate. 
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Post by Guest68 on Mar 23, 2023 12:25:29 GMT
The retro fit gear pump kit has the SS cover on them.
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Post by SrCusEngr on Apr 2, 2023 6:26:39 GMT
We here in the USA did not know the reason for the magnet failure, only that we were told late last year that a gear pump Retrofit kit would be made available. It was strange to us since it was usually happening on very used Version 8 machines. Then, more often than we would like to see, our clients started complaining about their Version 9 units with black fines in the tubing. Eventually, it turns out that model L and M gear pumps are prone (not hard fact) to having their interior magnet crack or dissolve.
As such, it doesn't take a lot of time to take out the pump, detach it from the motor and remove the cover if you think you have a flow problem. About 2 hr max per machine (3 gear pumps).
The service portal has the Assembly Instructions (AI) for the Gear Pump Retrofit Kit. It also requires a tool kit which is needed to set the spacing of the magnet. All part numbers are in the AI and how to remove and replace the magnet.
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Post by Zombie on Apr 3, 2023 12:18:25 GMT
how does one determine what model pump is installed? and is it best practice to replace part preemptively?
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Adnan
New Member
B Braun
Posts: 41
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Post by Adnan on Apr 4, 2023 10:57:47 GMT
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Post by Chuck Weddle on Apr 4, 2023 11:34:40 GMT
So I have roughly 130 V-9 machines, mostly with their original pumps. That's a LOT of pumps to check! I wonder if Braun can say at what serial # they used each pump version?
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Adnan
New Member
B Braun
Posts: 41
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Post by Adnan on Apr 4, 2023 12:49:13 GMT
So I have roughly 130 V-9 machines, mostly with their original pumps. That's a LOT of pumps to check! I wonder if Braun can say at what serial # they used each pump version? I got this from B Bruan  |
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