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Hugh MacKay and other Farmall A gurus

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tn terry t

11-20-2007 19:36:40

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please help me figure my axle bullgear problem siting on the tractor the left side. when i pulled the pan off to replace the gasket i noticed that the rivits that hold the bullgear together had been rubing the inside if the case just below the pinion gear i pulled up the parts break-down and every thing is in there thats supposed to be. only thing im not sure about there is a "concaved"washer-spacer in there which way should the washer be in there? also the rivits are loose can i just peen them tight or is there somthing special i need to do? any ideas other than a reversed washer?

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HendrikKRTC

11-25-2007 11:37:18

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Re: Hugh MacKay and other Farmall A gurus in reply to tn terry t, 11-20-2007 19:36:40

I recently reassembled the final drives of my Super A. The inner and outer bearing are common ball bearings. The large outer bearing holds the axle in place, hence the large spacer bushing between outer bearing and bullgear is important for that and it all being snug and tight is key!
Drop me an e-mail if you need more information or pics (oilpan is still off).
Regards, Hendrik from The Netherlands.

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tn terry t

11-21-2007 03:28:38

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Re: Hugh MacKay and other Farmall A gurus in reply to tn terry t, 11-20-2007 19:36:40

banjo is right the beveled washer was on the shaft behind the inner bearing when i took the axel out it fell off and i didnt know which way it went back on anyway there a approx.3/16 to 1/4 grove up there and the rivets have been wooped on pretty good everything is in there just Hugh said ill block it up better and chain the tractor to the roof and crawl under and have a better look see tonite THANKS FOR YOUR HELP EVERYONE !

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tractorsam

11-21-2007 15:11:34

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Re: Hugh MacKay and other Farmall A gurus in reply to tn terry t, 11-21-2007 03:28:38

I just spent last weekend rebuilding the final drive on a B. The tapered washer should be installed between the bull gear and the inner bearing with the curved surface facing the bearing. Hope this helps, tractorsam

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Hugh MacKay

11-21-2007 02:07:20

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Re: Hugh MacKay and other Farmall A gurus in reply to tn terry t, 11-20-2007 19:36:40

Terry: It's been 35 years since I had one of these apart, and I'm just checking both the IT service manual and the IH Blue Ribbon service manual. The manuals show what they call 3 different spacersand a washer, a long one between outer bearing and bull gear, another they call a spacer between bullgear and inner bearing. From there they show a spacer and a washer between inner bearing and cap screw.

Neither IT or IH mention shims, however I could see that being necessary now that these tractors are more than 50 years old

I guess I should also have asked first, how loose are those rivits and is one of them be looser than the others. I thinking the spacers, etc. are all in order and your only problem is the loose rivits. As I see it, there is not much clearence up near the top. My first suggestion would be tighten the rivits as Patrick suggests. Then when you put it back together, make note if the bull gear has any movement between the spacers. I expect it is supposed to be tight, if not I'd be looking at shims to keep it aligned with the pinion. Be careful with those shims, too much thickness in there will cause bearings to be loose in cones. You also don't want the bearing too tight in cones.

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banjo

11-20-2007 20:37:32

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Re: Hugh MacKay and other Farmall A gurus in reply to tn terry t, 11-20-2007 19:36:40

I beleive the washer should be placed so the lube oil will flow to the inside bearing. Beveled toward the bearing. Might try and tighten the rivits but then again i'm not a guru.

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Patrick Martin

11-20-2007 20:31:55

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Re: Hugh MacKay and other Farmall A gurus in reply to Janicholson, 11-20-2007 19:36:40

OK Terry, are you saying that you FOUND something that looks like a washer spacer in one of the final drive pans or do you mean one of the washers that go on the axle shaft end behind the bearing caps?????

What I'm getting is that you found a concave part in the pan.....

If so then take a close look at this piece. If the edges are rough and upon closer inspection look broken then I can tell you that it is part of the casting of the final drive, the backside of one of the threaded implement holes, that has broken off due to over tightening of the attaching bolts.

As for the rivets, you will need a helper to backup the rivet while you peen it. Just use a heavy bar or something and have him back up the rivet while you snug it up on the other with a flat punch and hammer. If it's really loose you could use a centerpunch too.

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banjo

11-20-2007 20:41:26

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Re: Hugh MacKay and other Farmall A gurus in reply to Patrick Martin, 11-20-2007 20:31:55

I think he is refering to the spacer on the axle shaft between the bull gear and inside bearing. It is slightly beveled on one side or at least they are on my super a and the b final drive i took apart.

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