Kubota B21 backhoe axle bearings

All non-Cub/Cadet/IH/Farmall/Case tractor and machinery discussions.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.

Kubota B21 backhoe axle bearings

Postby cowboy » Thu Apr 21, 2011 8:37 am

I've never seen a bearing broke like this before :!:

Image

Its been leaking for a few years and I thought it was a hyd line to the outriggers. Until my friend Scott grabbed and wiggled the tire when I had it jacked up digging a trench.

I don't know how it got broke but I have a feeling its one of two things. One when I first started working on our place I was putting in ditches buried to the axles in mud and could only move by pushing with the back hoe and curling the bucket and when I was trenching I could not get to solid material with the out riggers so a lot of the weight of digging went on the axle. Or two and most likely my Uncle had it and was square baling hay and dropping the bales in the field rather than hooking up a hay wagon. And having his 14 yr old son pick them up one at a time and take them to the barn. And he was doing it full speed hitting dead furrows jumping them with the tractor bouncing in the air. :headbang I wish I had been there and seen it their ears would still be ringing :!:

Image

It sure was a pain taking this thing apart. Had to pull off the whole loader backhoe subframe. 37 1/2" to 5/8" bolts (I don't know what the actual metric size is) on each side. Plus a bunch of smaller stuff. Then as I was pulling it apart I found I had no where to put jack stands that would not hurt anything else. So I ended up having to suspend the thing from hoists overhead.

I hope I can find somewhere else to get the bearings and seals from other than the kubota dealer. I ordered a service manual a week ago and told them I would pay shipping to get it as soon asap. And they said I may get it friday. Who knows how long bearings and seals will take :!: I have work I have to get done and I need it back together.

When its up and running its a great little machine :!:

Image

Billy
Take care of your equipment and it will take care of you. 1964 cub. Farmall 100 and 130.

"Those that say it can’t be done should not interrupt the ones who are doing it.”
User avatar
cowboy
Cub Pro
Cub Pro
 
Posts: 3414
Joined: Sat May 15, 2004 11:10 am
Location: MI, Britton
Zip Code: 49229

Re: Kubota B21 backhoe axle bearings

Postby dgrapes59 » Thu Apr 21, 2011 9:08 am

Billy,

Good luck obtaining the parts and getting it back together!

It kind of makes you appreciate the simplicity of a Cub doesn’t it!
David
User avatar
dgrapes59
501 Club
501 Club
 
Posts: 2608
Joined: Sun Jul 13, 2008 10:05 pm
Location: OH, Liberty Township (45044) (southwest OH)
Zip Code: 45044
Tractors Owned: 1951 Cub
1955 Loboy
a few plows, mowers, blades & such
Several '61 CC Originals, CC Narrow Frames- 70 & 100's, 71, Couple 102's & 122's, 72, 124, 73, various CC options & implements #2 Trailer, 1963 Springfield
Circle of Safety Award
Circle of Safety: Y

Re: Kubota B21 backhoe axle bearings

Postby Steve K. CALIF » Thu Apr 21, 2011 11:51 am

Hello Billy, Just my 2 cents on the bearings and the seals. You can most likely get the bearings and seals at a good bearing store like Motion Industries, Applied Industrial Tech., Kaman Industrial, etc. Even Grainger, perhaps. These are usually metric measurements if no numbers are to be found. Measure accurately and you should have no problem. Also note, the bearing you have in the picture is an "open" type. No seals or shields. It is also a standard radial bearing in that it has the standard number of balls for its size. You can most likely get a "max" bearing for this application. It will have a greater capacity. Only limiter might be rpm. In your case, shaft speed here would probably not be an issue. I'd shoot for the "max" bearing if it were mine, only a few dollars more. Also, check to see if a shielded bearing would keep any junk out of it. "Shielded" allows oil to the bearing where a "sealed" bearing does not. Even a shield on one side may be of value. Question would be if it runs in oil or not. And, can it be greased, etc.
I offer this observance only from 40 years of working in the bearing and power transmission industry and only with limited input based on your post.
Good luck! Steve K.
Steve K. CALIF
Cub Star!!
Cub Star!!
 
Posts: 371
Joined: Mon Feb 03, 2003 1:05 pm
Location: Madera, CA.
Zip Code: 93636
Tractors Owned: 1947 Cub #550
1962 LoBoy
Circle of Safety Award
Circle of Safety: Y

Re: Kubota B21 backhoe axle bearings

Postby ricky racer » Thu Apr 21, 2011 8:46 pm

Billy,

I'm sure that there is a bearing supply house in Adrin or Monroe. If you take the bearings to a bearing supply house, they will be able to match up a set of bearings for you likely cheaper than Kubota.
1929 Farmall Regular
1935 John Deere B
1937 John Deere A
1941 John Deere H
1952 John Deere B
1953 Farmall Cub
User avatar
ricky racer
501 Club
501 Club
 
Posts: 2744
Joined: Wed Sep 12, 2007 8:40 pm
Location: Niles / Buchanan, Michigan
Zip Code: 49120
Circle of Safety Award
Circle of Safety: Y

Re: Kubota B21 backhoe axle bearings

Postby cowboy » Fri Apr 22, 2011 6:48 am

Howdy David

Actually once I got the loader frame out of the way it was simple to get apart. It just takes time to figure it out.

Thanks Steve

I never knew there was a Max bearing I'll look into that :!: The bearings are inside the trans-axle and are oil bath.

Thanks Ricky

I am thinking of having my brother try to get them he works for Roush Racing and gets discounts from a lot of places.

Billy
Take care of your equipment and it will take care of you. 1964 cub. Farmall 100 and 130.

"Those that say it can’t be done should not interrupt the ones who are doing it.”
User avatar
cowboy
Cub Pro
Cub Pro
 
Posts: 3414
Joined: Sat May 15, 2004 11:10 am
Location: MI, Britton
Zip Code: 49229

Re: Kubota B21 backhoe axle bearings

Postby Gary Dotson » Fri Apr 22, 2011 7:10 am

Billy, that is an unusual fail mode, for a bearing, but I have seen it before. In my case, it was a new bearing that I installed during a transmission rebuild. The bearing race split, for no obvious reason, the day after the vehicle was returned to the owner. the supplier replaced the bearing, but I had to eat the labor.
I agree that there is nothing special about that bearing and any good supply house will be able to fix you up with a replacement. All bearings & seals I've encountered on Kubota stuff has been ordinary, off the shelf, stuff.
Gary Dotson
Team Cub Mentor
Team Cub Mentor
 
Posts: 2511
Joined: Thu Aug 03, 2006 6:20 am
Location: OH West Mansfield
Zip Code: 43358
Tractors Owned: 48 Cub Diesel (Cubota)
53 Cockshutt 20 restored (Shooter)
52 Cockshutt 20 unrestored
47 Leader "B" (Herckie)
49 Leader "D" (Princess)
49 Leader "D" very rough
48 Leader "D" unrestored
Kubota B6200E
Kubota B6200HST
Kubota B8200HST-D
Circle of Safety Award
Circle of Safety: Y

Re: Kubota B21 backhoe axle bearings

Postby cowboy » Fri Apr 22, 2011 8:52 am

Thanks Gary

Its good to hear its most likely a std part. I am quite sure it was broke from abuse. The axles are stub shafts with about 8" between the bearings. If as my other Uncle said the kid was jumping it through the dead furrows and launching it a foot or so in the air thats a lot of abnormal stress on the bearings with the weight of the backhoe on it. It also broke the C clip on the back that holds the axle in.

Billy
Take care of your equipment and it will take care of you. 1964 cub. Farmall 100 and 130.

"Those that say it can’t be done should not interrupt the ones who are doing it.”
User avatar
cowboy
Cub Pro
Cub Pro
 
Posts: 3414
Joined: Sat May 15, 2004 11:10 am
Location: MI, Britton
Zip Code: 49229


Return to Other Tractors and Machinery

Who is online

Users browsing this forum: No registered users and 1 guest