Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

deebig

BGB bearings

Recommended Posts

PhanDad

Assuming your tractor has the newer BGB with 7/8" cross shaft:

Needle bearings are easy to source, they're BH-1412 by Timken, Torrington, Toyo, etc

I've never been able to locally source the ball bearings.  The problem being the 7/8" ID for the shaft.  The older bearings Simplicity installed were Fafnir 205K17.  The following bearing numbers have been reported in various posts as being equivalent:

IDC 6205-2RS-7/8 

BCA 205N14

RB Tech 6205-14

Note: Some of the above bearings may have seals that must be removed.

See this post:

https://simpletractors.com/forums/topic/48784-bgb-rebuild-parts/

 

PS - The ball bearing seal is also a special and I believe only available through Simplicity.

 

Edited by PhanDad
Added note about seals to be removed

Share this post


Link to post
Share on other sites
deebig
11 hours ago, PhanDad said:

Assuming your tractor has the newer BGB with 7/8" cross shaft:

Needle bearings are easy to source, they're BH-1412 by Timken, Torrington, Toyo, etc

I've never been able to locally source the ball bearings.  The problem being the 7/8" ID for the shaft.  The older bearings Simplicity installed were Fafnir 205K17.  The following bearing numbers have been reported in various posts as being equivalent:

IDC 6205-2RS-7/8 

BCA 205N14

RB Tech 6205-14

Note: Some of the above bearings may have seals that must be removed.

See this post:

https://simpletractors.com/forums/topic/48784-bgb-rebuild-parts/

 

PS - The ball bearing seal is also a special and I believe only available through Simplicity.

 

Thank you! That is the info I was hoping to find.  A standard 6205 bearing has a 25mm bore, so a 7/8" bore is special bore .  I will measure the cross shaft tomorrow.....the build date was 1971.

Share this post


Link to post
Share on other sites
PhanDad
3 hours ago, deebig said:

I will measure the cross shaft tomorrow.....the build date was 1971.

I think by '71 all the gear boxes were the "newer" style with 7/8" all around - input shaft and both ends of the cross shaft (there were different styles of cross shafts, but all were 7/8" in diameter).  

The earlier boxes are harder to measure when still in the tractor.  The easy place to take a measurement is the exposed left shaft.  Problem is, that end is 7/8" while the other end is smaller (3/4" I think) and is covered by the spacer.  The input shaft has the yoke on it, but can be measured.  If the input shaft is 3/4", then I believe the cross shaft is the double diameter one at the bearing/seal locations.  

Someone please correct me if I have this wrong.  

 

Share this post


Link to post
Share on other sites
Bill725

These are the P/Ns I used to rebuild my 725 BGB a while back which is the older/smaller BGB with 3/4" shafts.

154278 Oil Seal = National 450233

118011 Ball Bearing = NSK 6204

154279 Needle Bearing = Torrington BH-1412

118117 Oil Seal = ? (Do not have P/N)

154263 Oil Seal = CR 7443

154258 Needle Bearing = Torrington J-1210

 

Share this post


Link to post
Share on other sites
MrSteele

I have a 65 apart right now.The cross shaft is the step down version, and I am having a new input shaft made, but I think it was a 3/4. It, the housing and a set of front axle spacers are supposed to be ready at the machine shop next week

Share this post


Link to post
Share on other sites
deebig

It is the needle bearing on the input shaft that needs replacing. All the other bearings and seals are OK. I want to do a quick repair but don't want to split tractor if I can help it. Can the cross shaft be removed with BGB still in the frame?

Edited by deebig

Share this post


Link to post
Share on other sites
Bill725

Understanding when Simplicity designed the first BGB tractor, the 700 Wonderboy, the first thing on the drawing board was the BGB. Everything else was designed around that. With that being said, if I were planning on keeping the tractor, understanding how much work is involved at getting to the BGB, I would invest the time and money to replace all the bearings and seals so you would not have to do it all over again soon.

Share this post


Link to post
Share on other sites
PhanDad

While I'm sure the hole in the frame is large enough to pass the needle bearing and seal for the input shaft, I think you'd have to be a magician to successfully do it.  

Wrenching in the limited space would be difficult, getting the retaining ring on and off the cross shaft is hard with the box removed, and keeping stuff clean so that the seals aren't nicked would be next to impossible IMO. 

I wouldn't attempt it.   

And if the box is out, I'd at least change out all the seals.  

 

Share this post


Link to post
Share on other sites
deebig
58 minutes ago, PhanDad said:

While I'm sure the hole in the frame is large enough to pass the needle bearing and seal for the input shaft, I think you'd have to be a magician to successfully do it.  

Wrenching in the limited space would be difficult, getting the retaining ring on and off the cross shaft is hard with the box removed, and keeping stuff clean so that the seals aren't nicked would be next to impossible IMO. 

I wouldn't attempt it.   

And if the box is out, I'd at least change out all the seals.  

 

Thanks, I'm pressed for time since I need to use the tractor right now.  I will wait until I have time to do a through rebuild,hopefully it will hold until then......thanks everyone.

  • Like 1

Share this post


Link to post
Share on other sites
deebig

Bit the bullet and repaired BGB, play was coming from worn input yoke,found one on ebay. Went ahead and replaced needle bearings and seals. The 7/8th bearings were fine so I did not replace even though I had new ones on hand....I believe in leaving well enough alone. Splitting tractor was surprisingly easy and I should have done it sooner! Thanks to all that replied.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Who's Online (See full list)

    • TomSchmit
    • SmilinSam
    • goatfarmer
    • airgunner
    • GregB
    • B-1 Bryan
    • rokon2813
    • tadams
    • PhanDad
    • MARK (LI)
  • Today's Birthdays

    No users celebrating today
  • Recent Status Updates

    • Paul M.Murphy

      Paul M.Murphy

      Hello glad I got on this site. I hope to upload a couple of photos of my Simplicity Broadmoor 
      Model 707 Tractor. I have replaced all the belts on it and installed a new ignition switch.
      Have a mower deck which was in poor shape , repaced a couple of bushings and welded the
      deck where there was some holes. The tractor and mower deck came from a friend and the 
      mower deck metal was getting pretty thin. Some new metal was put in it and we also undercoated the underside of the deck. This was done by my friend Greg Toulman.
      I have not put the mower deck on the tractor yet, waiting for Greg to come home and give me a hand. Can you please tell me if there is a manual for the mower deck and where I could get one.
      I would also like to get some moon wheel discs as well.
      I will try and down load some photos of the tractor when my wife shows me how to. 
      I really love driving this tractor and also how well it is made compare today's tractors, especially the flexible rear end and the rollers.
      Tell the next time 
      Paul
       
      · 9 replies
    • jbrooks

      jbrooks  »  Talntedmrgreen

      Josh
       
      folowing  this from a link at the downloads.  I just rescued an AC 920 with the lambodini diesel. I can' t download  yet .  Where did you find the PDF copy you posted. . I would like to figure out how to adjust the injection pump. 
      I assume it's a bosche, correct
      · 0 replies
  • Adverts

×