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Author Topic: Husqvarna 372xp spun bearing repair PTO side  (Read 500 times)

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Offline GRP7099

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Husqvarna 372xp spun bearing repair PTO side
« on: May 17, 2020, 02:48:14 PM »
Having some early model 372xp x-torq cases on hand that have had bearing failures, especially on the PTO side, I was wondering if anyone has tried any repairs on these case halves. Usually the bearing pocket is worn and will no longer retain the bearing with a press fit. Has a retaining compound such as loctite 660 ever been tried. I've used this on other machinery with success. Before I would attempt it I would like know if anyone else has tried it.

Offline Tacotodd

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Re: Husqvarna 372xp spun bearing repair PTO side
« Reply #1 on: May 17, 2020, 04:09:22 PM »
I have thought about trying something similar to that except in the permatex brand. I know that I can get that local at one of the auto parts places. I have not had to do it yet and I am hoping that if I ever have to on my 372, weíll letís just say that I have graduated to something more Ďcurrentí by then. BTW, 2018 372xp, probably one of the last ever made. After all, Iím interested in the now apparently available MS500i that is in my Stihl dealers little booklet. Iím in Bauxite AR 72011. I thought I had punched all of that information in, but thatís what I get for thinking!
Trying harder everyday.

Offline Real1shepherd

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Re: Husqvarna 372xp spun bearing repair PTO side
« Reply #2 on: May 17, 2020, 05:42:41 PM »
I would metal shim AND Loctite both. I've done this over a decade ago with no failures on a working saw. I can't even remember the saw model now, but it was a larger Husky.

Nothing proprietary about chainsaws over other machinery except being mindful about the max rpm's and constant exposure to gas/oil.

Kevin

Offline GRP7099

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Re: Husqvarna 372xp spun bearing repair PTO side
« Reply #3 on: May 17, 2020, 08:00:48 PM »
Yeah the only real difference would be that it's in a saw compared to what I've used it for in the past, mainly on large bearing fits in industrial motors, gearboxes, etc. In the steel mill environment. The RPM's would definitely be higher. 

Offline Tacotodd

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Re: Husqvarna 372xp spun bearing repair PTO side
« Reply #4 on: May 17, 2020, 09:30:38 PM »
If itíll hold, itíll hold!
Trying harder everyday.

Offline Real1shepherd

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Re: Husqvarna 372xp spun bearing repair PTO side
« Reply #5 on: May 17, 2020, 09:37:44 PM »
Yeah the only real difference would be that it's in a saw compared to what I've used it for in the past, mainly on large bearing fits in industrial motors, gearboxes, etc. In the steel mill environment. The RPM's would definitely be higher.
I was a Journeyman mechanic at a gold mill in CO once upon a time. I was responsible for all the mill's equipment. Those same principles apply to every other machine I ever used.

You get that bearing shimmed in there with Loctite and you'll not have to worry. Like any saw though, try not to dog it in a cut where the chain won't spin. Take the time to free up the chain.

Kevin

Offline Air Lad

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Re: Husqvarna 372xp spun bearing repair PTO side
« Reply #6 on: May 18, 2020, 03:57:48 AM »
I would metal shim AND Loctite both. I've done this over a decade ago with no failures on a working saw. I can't even remember the saw model now, but it was a larger Husky.

Nothing proprietary about chainsaws over other machinery except being mindful about the max rpm's and constant exposure to gas/oil.

Kevin
What material for the shim Kevin?
Also how about Devcon to fill the worn bearing housing?

Offline Real1shepherd

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Re: Husqvarna 372xp spun bearing repair PTO side
« Reply #7 on: May 18, 2020, 08:43:55 AM »
I would metal shim AND Loctite both. I've done this over a decade ago with no failures on a working saw. I can't even remember the saw model now, but it was a larger Husky.

Nothing proprietary about chainsaws over other machinery except being mindful about the max rpm's and constant exposure to gas/oil.

Kevin
What material for the shim Kevin?
Also how about Devcon to fill the worn bearing housing?
I used a steel shim material. However today, I might noodle around the Net with a metallurgy question on which would be more dielectric; brass or steel with magnesium.

Devcon Liquid Steel would work as well...I imagine though ever removing that bearing again would be a form of hell.....lol.

Kevin  

Offline weimedog

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Re: Husqvarna 372xp spun bearing repair PTO side
« Reply #8 on: May 18, 2020, 08:52:51 AM »
Be curious if a "long" term fix is possible. Part of the issues might be related to bearing alignment,, :) If not "true" Along with vibration will repeat the issue. Not certain if the cranks were updated, but the X-torq cranks were designed to run with those goofy tall pistons they have...best balance possible will obviously help with better vibration characteristics. Something to research I guess....be fun to see if a line bore operation is possible with either a welded case, maybe an insert or even a bearing with the same id but larger OD? Be a fun exercise for a "younger" version of me. The older one just buys a new set of cases. OEM. Think the AM cases are soft and the recess may not be right for the cylinder flange. 
Husqvarna 365sp/372xpw Blend, Jonsered 2171 51.4mm XPW build,562xp HTSS, 560 HTSS, 272XP, 61/272XP, 555, 257, 242, 238, Homelite S-XL 925, XP-1020A, Super XL (Dad's saw); Jonsered 2094, Three 920's, CS-2172, Solo 603; 3 Huztl MS660's (2 54mm and 1 56mm)

Offline Tacotodd

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Re: Husqvarna 372xp spun bearing repair PTO side
« Reply #9 on: May 18, 2020, 09:32:48 AM »
Walt, I see what you are talking about, but I have not personally ever been into a case, my saw repair shop has, and they have only done it the one time. Donít get me wrong, he did a spectacular job, and even though he is a genuine Husqvarna dealer, he said that he will ďneverĒ do it again. He said they only pay 1 1/2 hrs labor and it took him 8. Granted, heís not practiced at it, so I could see that being the case. Even though they make you attend all of these schools, they are online, so no hands on type of things. I can see where so many shops would simply say ďit must not have any oil in the fuelĒ, but the rest of the OE repair shops around me are even worse. What do you do? Husqvarna will not even let them send it back to them for these fairly involved repairs that are under warranty. Cripes! It almost makes me want to cry. Itís starting to look limited. Would Bobís shop do this kind of genuinely defective repair work? If you feel like you may be trying to put words in his mouth then donít answer this. Just get him involved if you donít mind. I feel bad that I may be dis-railing this thread, but I am just curious. Back to the regular scheduled programming....
Trying harder everyday.

Offline GRP7099

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Re: Husqvarna 372xp spun bearing repair PTO side
« Reply #10 on: May 18, 2020, 08:59:56 PM »
Weimedog, the alignment thing had me wondering too. I could turn a bushing to fit the pocket with an interference fit and make the ID the same as original. I even thought about boring the pocket for a 37mm bearing for which I've found. I guess it all comes down to how much time and effort do you put into an experiment? Honestly I might just use the 660 retaining compound, install a Farmertec crank, rod, cylinder and piston and make this a test saw.


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