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If the issue only on the wet side in would buy new wet side and get done with it.It looks like my old school four-year-old MP 40 bearing is out. Should I rebuild it or just buy a new one. Of course the west side
Thanks. I was just wondering if a small little bearing would be cheaper, easier. I got the get it done part, but I have enough flow to work on this one for a while.If the issue only on the wet side in would buy new wet side and get done with it.
Oh ok I looked too quick. Thanks. I’ll just order another. Wet sideIf you're talking bearings, you're talking the dry side. The wet side, on the older MP40's have a solid ceramic bearing....no rebuilding to do there.
But the dry side can be rebuilt by purchasing bearing for about $15 - $20 dollars. If I can find the post about my rebuild, I'll edit it in here.
I’ve never heard that and had these for years. I soak it in vinegar for a week and all the sudden they were no good. Maybe that’s why? What does the vinegar ruin?Oh, OK....wetside can't be "rebuilt"....only the dry side. So you did the right thing in ordering a new wetside....I've had to do that with all my "old" MP's.
And FYI, don't clean the magnet in vinegar. Only use vinegar on non-magnet parts. You can use other acids (diluted muriatic acid or citric acid), on the magnets, but I just wash mine with water and a brush.
Oh, OK....wetside can't be "rebuilt"....only the dry side. So you did the right thing in ordering a new wetside....I've had to do that with all my "old" MP's.
And FYI, don't clean the magnet in vinegar. Only use vinegar on non-magnet parts. You can use other acids (diluted muriatic acid or citric acid), on the magnets, but I just wash mine with water and a brush.
Not sure if it was your problem, but vinegar is able to penetrate plastic, and attack the magnet, causing it to swell.
Acids undergo dissociation in aqueous solution, which is commonly shown as:
HA(aq)+H2O(l)⇌H3O+(aq)+A−(aq)
where HA is the acid. In the case of acetic acid, it very poorly dissociates into acetate and hydrogen, and predominately remains as the "uncharged" acetic acid (HA). (As a comparative, Hydrochloric acid readily dissociated). As a small uncharged compound, it can now penetrate the plastic, and eventual get to the magnet and cause it to rust and swell. It's happened to me, three times over, with the wetsides of MP40's. I can't take credit for "discovering" this....it was Randy Holmes Farley that originally enlightened me to the acetic acid thing. Here's what he said:
I think the effect on plastic may be worse with vinegar than muriatic acid but it may depend on the plastic.
Vinegar can be in the form of acetic acid and that neutral molecule can enter plastic. Diluted muriatic acid won't have any neutral acidic molecules in it to enter plastic, so just exposes the outermost leading edge of plastic. So while the muriatic acid after dilution is a much stronger acid, i would not assume it is worse on plastics.
FWIW, I've used diluted muriatic acid for decades as have others, and I've not heard of cords being damaged, but I've also not inspected them closely.
Ever since I saw this, and my experience with regularly cleaning with vinegar, and the loss of three wetsides, I've stopped using vinegar on any and all magnets.
Plus, I read on ecotech’s website a month or so ago that a 50/50 mixture of hot water and vinegar was their recommended soaking solution... one hour of time, scrub, rinse, ready to go.I don’t think there’s verifiable data that a dilute vinegar soak actually degrades the magnet coating. However, since it’s unnecessary, probably wise to not do it just in case. The only part that really needs vinegar is the plastic cage.
Regardless, getting four years from a wetside is pretty good. They develop ‘slop’ after a while and get noisy (or fall off). I only have one of the old style MP40s and it got a new wetside after four years. None of my QD models have required a new one yet. Plus, the newer MP40 wetside is a better design.
Very interesting.Not sure if it was your problem, but vinegar is able to penetrate plastic, and attack the magnet, causing it to swell.
Acids undergo dissociation in aqueous solution, which is commonly shown as:
HA(aq)+H2O(l)⇌H3O+(aq)+A−(aq)
where HA is the acid. In the case of acetic acid, it very poorly dissociates into acetate and hydrogen, and predominately remains as the "uncharged" acetic acid (HA). (As a comparative, Hydrochloric acid readily dissociated). As a small uncharged compound, it can now penetrate the plastic, and eventual get to the magnet and cause it to rust and swell. It's happened to me, three times over, with the wetsides of MP40's. I can't take credit for "discovering" this....it was Randy Holmes Farley that originally enlightened me to the acetic acid thing. Here's what he said:
I think the effect on plastic may be worse with vinegar than muriatic acid but it may depend on the plastic.
Vinegar can be in the form of acetic acid and that neutral molecule can enter plastic. Diluted muriatic acid won't have any neutral acidic molecules in it to enter plastic, so just exposes the outermost leading edge of plastic. So while the muriatic acid after dilution is a much stronger acid, i would not assume it is worse on plastics.
FWIW, I've used diluted muriatic acid for decades as have others, and I've not heard of cords being damaged, but I've also not inspected them closely.
Ever since I saw this, and my experience with regularly cleaning with vinegar, and the loss of three wetsides, I've stopped using vinegar on any and all magnets.
Yes. The new wet side is compatable with the old.