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52 8N rear axle bearing removal

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Axtell
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PostPosted: Sun Jan 12, 2020 1:21 pm    Post subject: 52 8N rear axle bearing removal Reply to specific post Reply with quote

How much effort is required to remove the bearing off the axle. I don t want to get too heavy handed with it. Will even tapping do it or is it pressed on?

Thanks
Axtell
 
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Bruce (VA)
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PostPosted: Sun Jan 12, 2020 2:58 pm    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote

You need to sweat it off w/ a torch.

Easier to replace the entire axle w/ a new bearing; getting a new bearing back on isn't as easy as getting the old one off.
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Hobo,NC
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PostPosted: Sun Jan 12, 2020 5:55 pm    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote


They press right off... And press on no problem... You need a press and a few press blocks nuttin to it... EZ as pie...
 
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Hobo,NC
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PostPosted: Sun Jan 12, 2020 5:57 pm    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote


8N's don't use a retainer like a 9/2N... They press on and off the bearing butts to the differential end of the axle and is trapped when bearing retainer is installed it taint going no where Wink
 
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Bruce (VA)
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PostPosted: Sun Jan 12, 2020 6:46 pm    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote

Yep, I was thinking 2/9N.

Did one and said never again.
 
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Axtell
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PostPosted: Mon Jan 13, 2020 12:16 am    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote

Thanks! Can t quite get a clear picture how that works, though let alone have a press. Maybe since I am replacing the axle and hub I should god for the bearing as well? Mission creep. So as the hub is tightened the bearing presses on?

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Axtell
 
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TheOldHokie
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PostPosted: Mon Jan 13, 2020 2:59 am    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote

Axtell wrote:
(quoted from post at 04:16:03 01/13/20) Thanks! Can t quite get a clear picture how that works, though let alone have a press. Maybe since I am replacing the axle and hub I should god for the bearing as well? Mission creep. So as the hub is tightened the bearing presses on?

Thanks,
Axtell


No. The bearing is pressed onto the axle shaft before the shaft is installed in the axle tube.

TOH
 
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Axtell
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PostPosted: Mon Jan 13, 2020 4:45 am    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote

Yeah... I m gonna have to take this to a shop. Have not been able to find any vids or photos for that setup. Plus I don t have a press. For me it would be worth getting one for future projects but would still be at a loss on how to do this with the axle length being involved.

Thanks. You all have been most helpful!
Axtell
 
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Axtell
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PostPosted: Mon Jan 13, 2020 4:51 am    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote

Yeah... I m gonna have to take this to a shop. Have not been able to find any vids or photos for that setup. Plus I don t have a press. For me it would be worth getting one for future projects but would still be at a loss on how to do this with the axle length being involved.

Thanks. You all have been most helpful!
Axtell
 
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Hobo,NC
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PostPosted: Mon Jan 13, 2020 5:30 am    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote

Axtell wrote:
(quoted from post at 18:45:24 01/13/20) Yeah... I m gonna have to take this to a shop. Have not been able to find any vids or photos for that setup. Plus I don t have a press. For me it would be worth getting one for future projects but would still be at a loss on how to do this with the axle length being involved.

Thanks. You all have been most helpful!
Axtell


You may be able to drive it off and on I use my press... I am sure there are other ways to do this That being said they are a press fit a press will make EZ work of it even a cheap press will do it... I don't remember how I install them I would wager I use a piece of pipe that fits over the axle and fits the inner bearing race and drive it on. If I pressed it on I would have to drastically change my press set up so I spec I would try driving it on first...

You could heat the bearing in oil it may drop on...

A good rule of thumb if the bearing race is good the bearing is normally good... If in doubt have an experienced wrench inspect it while you have it out. If the bearing is good its as good are better than a new one its a proven part unlike a never ran new one Wink That's why I go the extra mile to clean and inspect if I see metal flakes when I take it out no need to waist my time I trash it no matter how good it looks...

To inspect the inner race clean it take it outside in the daylight hold it up rotate the rollers and look for issues on the inner race. From the outside Roll the bearing Look at all the rollers for issues.

Page 8 Fig. 7. Debris from other fatigued parts, inadequate
sealing or poor maintenance caused bruising on this
tapered roller bearing race..

On a slow moving tractor my personal tractor not a paying customers tractor...

I am sure you will see this I am not gonna condemn that bearing as long as the rollers and bearing inner race looks good with no issues. If the rollers and inner bearing have this issue with no other issues its trashed...


https://www.timken.com/pdf/5892_Bearing%20Damage%20Analysis%20Brochure.pdf

Google ASE Test Prep- T8 Preventive Maintenance
 
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rvirgil_KS
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PostPosted: Mon Jan 13, 2020 6:35 am    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote

Here are notes I made several years ago after replacing outer axle bearing on my 51 8N


1. Remove axle
2. Put new bearing cup (race) in the freezer at least overnight
3. Pressed old bearing off axle with Harbor Freight 12 ton press. Leave nut on with outer threads flush with end of shaft. Came off easy
4. Remove oil seal from race holder
5. Weld bead around inside of race at about middle of race. When I took screw driver to brush out slag flecks the race turned so a couple of taps with punch drove it out.
6. While race holder was still warm I took frozen race, applied a thin film of oil and, using a block of wood, tapped the race into the holder.
7. Put new bearing in a pan of 5w-30 motor oil covering bearing. Put on burner and let heat until oil smoked. I continually stirred the bearing around in the pan with a wooden dowel. (get it out of the house as soon as it begins to smoke!!)
8. I had shaft, old bearing and pipe sleeve ready to drive new bearing on to shaft. I removed hot bearing from oil, dropped on shaft and it dropped completely on, no driving necessary.
 
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Btzj02
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PostPosted: Mon Jan 13, 2020 7:09 am    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote

Bought a bearing puller kit. Took quite a bit of force but was able to pull off bearings. To press on new bearings I left axles outside overnight, 0 degrees F. Heated hydraulic oil in crock pot and soaked bearings for a killer hours. Used a short two inch piece of black pipe as a press. Dropped hot bearing on cold axle, tapped once with pipe, done
 
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TheOldHokie
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PostPosted: Mon Jan 13, 2020 9:00 am    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote

Axtell wrote:
(quoted from post at 08:51:26 01/13/20) Yeah... I m gonna have to take this to a shop. Have not been able to find any vids or photos for that setup. Plus I don t have a press. For me it would be worth getting one for future projects but would still be at a loss on how to do this with the axle length being involved.

Thanks. You all have been most helpful!
Axtell


A simple setup for pulling axle bearings shown below. The off the shelf puller kit pictured is $53 from Eastwood and a good addition to any tool chest. The extension pieces in it are not going to be long enough for the tractor axle but you can substitute some chain or cheap threaded rod from your local box store as shown in the second image.

Bearing interference fit to the shaft is just a thou or two at the most - no heating needed. You can drive the new one on with a piece of steel pipe that fits snugly over the axle shaft. Just use it like a slide hammer - make sure you are striking the inner race and not the rollers or cage.

TOH




 
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Axtell
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PostPosted: Mon Jan 13, 2020 11:11 am    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote

Now That is very helpful! I do better with images. That bearing tool looks interesting. I almost bought one of those in the Northern Tool place this morning but it did not have the "Puller" studs/bolts with it. I would have never thought of that chain rig.

Thanks!
Axtell
 
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TheOldHokie
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PostPosted: Mon Jan 13, 2020 11:28 am    Post subject: Re: 52 8N rear axle bearing removal Reply to specific post Reply with quote

Axtell wrote:
(quoted from post at 15:11:50 01/13/20) Now That is very helpful! I do better with images. That bearing tool looks interesting. I almost bought one of those in the Northern Tool place this morning but it did not have the "Puller" studs/bolts with it. I would have never thought of that chain rig.

Thanks!
Axtell


I would go with threaded rod over chain - a lot easier to manipulate. Ten foot of 3/8" is $8 at Home Depot and will handle a 2 ton pull.

TOH
 
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