Yesterday's Tractor Co. Parts for Farm Tractors - Compare our Prices!
Click Here or call 800-853-2651 
   Allis Chalmers Case Farmall IH Ford 9N,2N,8N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   Traditional YT Forum ViewClassic View   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

H main bearings


 
Post new topic    
View previous topic :: View next topic  
Author Message
Mike(NEOhio)
Guest






Report to Moderator

PostPosted: Thu Dec 20, 2012 6:41 pm    Post subject: H main bearings Reply to specific post Reply with quote

I'm preparing to re-babbitt the rods from my '41 H but the mains need it too. Has anybody done this? I melted out the old babbitt and the mains have a steel bushing that looks like it's pressed into the housings. I didn't want to heat the whole housing so I made a puller to extract the bushing on the RH. A real dumb-a?? move. I thought the bushing was moving but all I did was pop the end off the casting. Does anyone know how those bushings were put into the housings? They won't budge. I haven't tried heating the housing yet. Bushings are only about 1/16 wall thickness so I don't get why they're so tight.

Any hints or suggestions welcome.
 
Back to top
gtx1967jewison
Tractor Expert


Joined: 21 Oct 2007
Posts: 2614


Report to Moderator

PostPosted: Thu Dec 20, 2012 10:22 pm    Post subject: Re: H main bearings Reply to specific post Reply with quote

Send the rods & main housings to an experienced babbit guy now, OR the whole tractor to the scrapper (china) real soon. In the first place pouring babbitt is quite hazardous & if their not done right theyre useless & need redone again.
Im not saying your incapable, just something that in my opinion takes lots of experience and/or apprentice to do correctly Smile
If you can afford to screw it up and do it over- then go for it &have enjoy learning a nearly lost ART
 
Back to top
View user's profile
Mike M
Tractor Guru


Joined: 31 Mar 1998
Posts: 18672


Report to Moderator

PostPosted: Fri Dec 21, 2012 5:18 am    Post subject: Re: H main bearings Reply to specific post Reply with quote

I had a few of those cranks turned or built up and turned ? and then the machine shop fitted them with bronze bushings for the main bearings.
Center Automotive in Akron Ohio did this.
 
Back to top
View user's profile
tim s
Tractor Guru


Joined: 01 Nov 2008
Posts: 6902
Location: Somerset Ohio

Report to Moderator

PostPosted: Fri Dec 21, 2012 5:41 am    Post subject: Re: H main bearings Reply to specific post Reply with quote

I know it"s a little off the subject, but I have a Brand new H crank here some where that I will never use, last I saw it it still had cosmoline on it...
 
Back to top
View user's profile
Rwolfejr
Regular


Joined: 19 Feb 2008
Posts: 245
Location: Western Pennsylvania

Report to Moderator

PostPosted: Fri Dec 21, 2012 6:31 am    Post subject: Re: H main bearings Reply to specific post Reply with quote

Why not replace the bearings with a more conventional bearing? There's no rule that says the bearings need to be poured babbit.

Far as that sleeve goes... I don't know what you're looking at. Do you have a parts book that show the sleeve as a seperate part? Are you certain it isn't just a shoulder machined into the casting? If it is indeed a sleeve then what I'd do is take a measurement of the location of the sleeve and write it down so you know where the new one needs to sit. Then grind / cut a slit in it and pop it out. Then get accurate measurements of the bore. Measure across a few different places. Odds are it won't be dead round. If the bore is way out of round that's another story. Then buy new bearings (see below) for a light shrink fit to the bore. I don't know what diameter your bearings are but figure somewhere around 4" O.D. on your bearings? Close enough.... I'd shoot for .002 to .004 interference fit. Remember that your new alloyed up aluminum bearing Inside diameter will shrink a breath also so have it sized to the baggy side of whatever clearance you want to your crank. Myself... if the bores are round within say .002... I'd ask for a bore about .007-.008 shooting for the 8... over your crank journal diameters. After installation you'll be around .005-.006. I don't think you want to go any tighter than that on these old girls. Better to error to loose than tight. You can run these up as baggy as .012+ without any issue. Wouldn't go that high but just saying...

Pressing the bearings in would be good enough but a shrink fit would be nicer. So you toss your bearing in the freezer and heat up the casting. When you go to install be quick and accurate. If you miss the mark then you'll simply need to press the thing home. Guessing there's a oil hole that'll need lined up too? A pair of thick plates and a bolt through the middle could pull the bearing in. Might need to turn a shoulder on one plate if the bearing is recessed a bit.

I would call or e-mail these folks...
Manitowoc Motor Machining and Parts.

http://www.motormachining.com/html/john_deere_main_bearings.html

They make new bearings for these old tractors and I thought their prices were very reasonable.
You can still buy babbit... and wood bearings... and all sorts of antiquated materials but doesn't necessarily mean it's the best for the application.

Good Luck,
Bob
 
Back to top
View user's profile
Cockbird_Hunter
Regular


Joined: 17 Sep 2008
Posts: 177


Report to Moderator

PostPosted: Fri Dec 21, 2012 6:52 am    Post subject: Re: H main bearings Reply to specific post Reply with quote

Mike:

To remove the pressed-in RH (Blind) main bearing, I have scored & cut through the bearing with a Sawzall metal blade being careful not cutting into the bearing housing.

I sent my rods to Paul's Rod & Bearing (Russ Schworer 816-587-4747) for rebabbitting.

For the mains, I ordered new press in bearings from Sharp's Antique Tractor Works In MO.

I then had my local auto machine shop turn the crank main & rod journals then machine the rod & main bearings to 0.002" > the machined crank rod/main journal dimensions....It's a little tricky with the right hand bearing being blind...

Hope this helps.....Good Luck!
 
Back to top
View user's profile
Mike M
Tractor Guru


Joined: 31 Mar 1998
Posts: 18672


Report to Moderator

PostPosted: Fri Dec 21, 2012 7:43 am    Post subject: Re: H main bearings Reply to specific post Reply with quote

How did you ever come up with that ?
 
Back to top
View user's profile
tim s
Tractor Guru


Joined: 01 Nov 2008
Posts: 6902
Location: Somerset Ohio

Report to Moderator

PostPosted: Fri Dec 21, 2012 10:47 am    Post subject: Re: H main bearings Reply to specific post Reply with quote

It was in with some parts I got years ago, at first I didn't know what it was (they are a bit unusual) I have a 41 H thought it may be good to keep,but I will never use it I'm sure..It is brand new..
 
Back to top
View user's profile
Mike(NEOhio)
Guest






Report to Moderator

PostPosted: Fri Dec 21, 2012 2:56 pm    Post subject: Re: H main bearings Reply to specific post Reply with quote

How did the bronze work out. What type, oilite, aluminum or something else.
 
Back to top
Mike(NEOhio)
Guest






Report to Moderator

PostPosted: Fri Dec 21, 2012 2:59 pm    Post subject: Re: H main bearings Reply to specific post Reply with quote

Does that crank have the gear on it?
 
Back to top
Mike(NEOhio)
Guest






Report to Moderator

PostPosted: Fri Dec 21, 2012 3:41 pm    Post subject: Re: H main bearings Reply to specific post Reply with quote

When you sawed those bushings, did they come out easy or was something else holding them? I'm going to try some heat on the housings and maybe some kroil, but if they're that tight it may not penetrate. I was a tool and die maker for 20 yrs and another nine in tool design, so the machining and fixturing is no problem for me. As far as the babbitting goes, It's not a lost art but rare, and I just want to try my hand at it. I've already made a mandrel for the rods, researched babbitt procedures and contacted the JD historical to get the proper grade of babbitt.

Thanks for the input.
 
Back to top
tim s
Tractor Guru


Joined: 01 Nov 2008
Posts: 6902
Location: Somerset Ohio

Report to Moderator

PostPosted: Fri Dec 21, 2012 3:46 pm    Post subject: Re: H main bearings Reply to specific post Reply with quote

I can't remember I'll look tomorrow.
 
Back to top
View user's profile
Cockbird_Hunter
Regular


Joined: 17 Sep 2008
Posts: 177


Report to Moderator

PostPosted: Fri Dec 21, 2012 5:48 pm    Post subject: Re: H main bearings Reply to specific post Reply with quote

Mike:

It has been a few years now, but I think the RH main bearing cane out easily once cut...I may have made two cuts....I did not have to use heat.

For the con rod bearings, I assume you are working on an H after S/N 21500. Pre 21500 tractors had shell type automotive type bearings & 21500-on tractors had "spun-babbitt" bearings that have adjustable clearance by controlling shims in the rod bolts.
 
Back to top
View user's profile
Mike M
Tractor Guru


Joined: 31 Mar 1998
Posts: 18672


Report to Moderator

PostPosted: Fri Dec 21, 2012 8:40 pm    Post subject: Re: H main bearings Reply to specific post Reply with quote

I don't know exactly what was used. It worked good.
 
Back to top
View user's profile
Mike M
Tractor Guru


Joined: 31 Mar 1998
Posts: 18672


Report to Moderator

PostPosted: Fri Dec 21, 2012 8:44 pm    Post subject: Re: H main bearings Reply to specific post Reply with quote

Just wondered if it came from the old Killbuck Eq. When they had a sale. They had boxes and boxes full of goodies.
 
Back to top
View user's profile
Display posts from previous:   
Post new topic    Yesterday's Tractors Forum Index -> John Deere All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
TRACTOR   PARTS TRACTOR   MANUALS
Same-Day Shipping! Most of our stocked parts ship the same day you order (M-F).  Expedited shipping available, just call!  Most prices for parts and manuals are below our competitors.  Compare our super low shipping rates!  We have the parts you need to repair your tractor.  We are a Company you can trust and have generous return policies!   Shop Online Today or call our friendly sales staff toll free (800) 853-2651.

YT Home  |  Forums Home

Copyright © 1997-2014 Yesterday's Tractor Co.

Powered by phpBB © 2001, 2005 phpBB Group

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters