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Farmall & IHC Tractors Discussion Forum
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SAV front axel pivot

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RedJohn 2

05-30-2006 19:26:41




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Concerning a Super AV: If you disassembled the front end completely I am very interested in just exactely how to reassemble one. I'm trying to reassemble the pivot shaft into the new bushings in the axle and the accompaning openings in the lower steering housing. I did set up the axel in my press and pressed the shaft through both the axel bushings, so I know it will go. I pressed the shaft back out. Now I'm trying to repeat the process for real ....on the tractor. There is so much resistance when trying to push the shaft through the openings and bushings, I'm wondering if I must set up some squeeze/press/vise-type set up. If anyone can lend me any advice, I will be most beholding. Thanks.
John

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Bill46

05-31-2006 08:08:21




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 Re: SAV front axel pivot in reply to RedJohn 2, 05-30-2006 19:26:41  
Red John,
You are talking about the shaft that runs from the side of the engine down to the axle pivot.
You have sonething not right there. You sure you got the right bushings? You may have the ones for a standard round axle. They are smaller.
I would check and insure someone gave you the right ones.
I just redid a 140, and it went right together...no problem.



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gene bender

05-31-2006 04:21:41




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 Re: SAV front axel pivot in reply to RedJohn 2, 05-30-2006 19:26:41  
Did you make a new shaft? The shaft is not a press fit. If you did make a new one with bushings in the axle the shaft needs to be a slip fit where the bushings seat and where it clamps on each end. The shaft should have 30thous clearence between those journals you should be able to get the measurements off the old one. Mite need to drive a could chisel between the ears on each end to get some clearence when installing. Has the pivot been welded or repaired where it is welded to the axle?

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RedJohn 2

05-31-2006 04:50:31




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 Re: SAV front axel pivot in reply to gene bender, 05-31-2006 04:21:41  
Gene, Thanks for your reply. I'm Working on a SAV with the heavy duty cast diamond shaped axel. This pivot shaft is the crooked one that bolts to the engine/torque junction. This shaft I'm using is the original, all polished up and I think it's in perfect condition. It appears that for a real tight front end, one that does not shake, rattle and roll, these axel/bushing meetings were intended to be tight. ....they are! Now, if I could just get everything installed, I think it'ud be just like new. Oh, I do have the shaft in the freezer right now. Gonna see if that helps. Please tell me you've done this procedure before, and please tell me how. Thanks. John

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gene bender

05-31-2006 16:43:00




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 Re: SAV front axel pivot in reply to RedJohn 2, 05-31-2006 04:50:31  
I have madenew ones for the As and the pin should be the same because the steering sectors are alike. I have found bent ones and bad bushings but havent had any problems putting back. You mite have mushroomed the bushings when you installed them as tha pin should travel free.



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scotty

05-31-2006 06:09:23




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 Re: SAV front axel pivot in reply to RedJohn 2, 05-31-2006 04:50:31  
Mornin John, Something doesnt sound right to me !!!
There is no press fit there as Gene has allready stated! No need to have that pivot shaft in the freezer. When I rebuilt the frontend on my Super A my pivot shaft was slightly bent, so I made a new one at work out of stainless steel. The bolts that go through the bottom of the steering box lock the pivot shaft in position. The pivot shaft has scallops in the shaft to prevent it from moving in or out of position. What you need to check is the fit between the bushings in the front tube abd the pivot shaft. Ideally .001-.002 would be fine. If the bushings are worn they need to be pressed out and replaced with new bushings. You would then have to ream those new bushings after they were pressed into the front tube. Hope this helps.

scotty

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RedJohn2

05-31-2006 06:57:56




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 Re: SAV front axel pivot in reply to scotty, 05-31-2006 06:09:23  
Gene & Scotty, Thanks to you both. This is a SAV I"m working on, not a SA. This is the heavy duty one. The pivot shaft is about 2 feet long, crooked in the shape of a hand starting crank. I have pressed out the old bushings, pressed in new ones. The new bushings are Case/IH from C&G. According to I&T manual these bushings are presized. I take that to mean no reaming necessary? At any rate I have pressed the axel into the bushings and back out again. Looks like that would ream them a little bit. Still stumped. Thanks in advance for any further help. John

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scotty

05-31-2006 10:08:29




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 Re: SAV front axel pivot in reply to RedJohn2, 05-31-2006 06:57:56  
John, When they say the bushings are pre sized, they mean that they should press into the housing without any machining. Then you have to check the inside bore of those bushings with a inside micrometer or telescoping gage and compare that to the pivot shaft diameter. I am not familiar with the SAV but the principle should be all the same. If I can help any further please say so. If you have a machinist or toolmaker friend he can take some measurements for you!

scotty

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RedJohn2

05-31-2006 11:37:41




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 Re: SAV front axel pivot in reply to scotty, 05-31-2006 10:08:29  
GOT IT!!! Gene & Scotty, Thanks for your help. Sometimes it just takes a couple others to reinforce what we really already know.....it WILL!! go. This shaft being crooked makes the installation really awkward. Scotty, I had already miked bushings and shaft to reassure the fit....real close, but should go if perfectly aligned. Now that it's done I think there are two keys: 1)After old bushings are pressed out & new ones pressed in, while axel is still in press, then press polished shaft into and through both bushings. Then press shaft back out. I think this is necessary step to get the two bushings in perfect alignment with each other. 2)Place shaft into freezer so it will reduce in size as much as possible. Set up axel into lower steering housing using floor jack, engine hoist, whatever. Then get FROZEN shaft and start it into bushings by hand as far as possible. Then using a 2 ft 4x4 whack real hard. If you're lucky it may go in 1/4 inch or so. Then whack some more till it's snug.....MILLER TIME!!! Thanks again men, for your help. John

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