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What I found today

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Zachary Hoyt
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PostPosted: Sun Jan 06, 2013 7:48 pm    Post subject: What I found today Reply to specific post Reply with quote

I made some more progress on the 300 today. I put the TA housing on an old copier cart on casters that I had saved and put in the shed with the idea that it would come in handy someday. The pilot bearing had indeed fallen apart as was foretold by various wise sages on this forum. I found one roller by the seasonal disconnect lever, so it must have hopped through the round hole in the front of the transmission housing. The other bearings I have seen so far are all in remarkably good shape, it looks to me like they were put in new by the previous mechanic. I have one axle out now and I found that the outer bearing had been installed with the shield on the inside (toward the center of the tractor), which is backwards of how I thought it was supposed to be, so I plan to turn it around before reassembly. I took one brake apart and found it is in very good shape and the seal looks new. I was going to think about putting H axles in it since I do not want the extra length but I found that the H axles have 16 splines and the 300 have only 14 splines, so that idea goes out the window. Tomorrow I hope to finish the teardown. I am wondering about what is the best liquid to clean the inside of the castings. I was thinking about diesel fuel and an old paint brush but if there is a better way I would like to find out. I also am wondering what to use when I am setting the mesh and backlash on the ring and pinion. My I&T manual says to use "Prussian blue or red lead" and I am wondering if there is some other material that is in use now. Thank you all very much for your patience with my many questions.
Zach


 
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randy hall
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PostPosted: Sun Jan 06, 2013 7:51 pm    Post subject: Re: What I found today Reply to specific post Reply with quote

the axle bearing was installed correctly.
 
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Glenn F.
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PostPosted: Sun Jan 06, 2013 7:56 pm    Post subject: Re: What I found today Reply to specific post Reply with quote

You have really done a lot of work there Zach. I'm impressed.

Glenn F.
 
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John G. Hasler
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PostPosted: Sun Jan 06, 2013 8:02 pm    Post subject: Re: What I found today Reply to specific post Reply with quote

> My I&T manual says to use "Prussian blue or red
> lead" and I am wondering if there is some other
> material that is in use now.

I just use Magic Marker where prussian blue is called for.
 
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Janicholson
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PostPosted: Sun Jan 06, 2013 8:03 pm    Post subject: Re: What I found today Reply to specific post Reply with quote

The use of any bearing that is substantially tight, clean and (after looking with a magnifying glass) has no marks in balls or races. will be OK.
Kero, or diesel (cheaper) is fine. Using air to blow out small crevices and openings is also reasonable. Red Lead is not optional today, but Prussian Blue is both fine and available. The pattern should be uniform across the ring gear tooth flank, while the backlash is in spec.
Jim
 
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the tractor vet
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PostPosted: Sun Jan 06, 2013 8:32 pm    Post subject: Re: What I found today Reply to specific post Reply with quote

Well and old trick i have used on setting up and ring and pinion is heavy black grease . NOW KEEP IN MIND HERE that the BOOK gives set up for NEW not used and always use a set , not this part from one and the other from another and try and get the shims from the donor tractor . also do not try for FACTORY SET ON BACKLASH . IF you have a good centered drive and a decent coast and you can not throw a cat thru on the backlash your good to go . And one tiny little tidbit , when your putting things back together take a heavy rubber band and wrap it tight around the input bearing as this keeps the rollers tight and less chance of knocking them out when you put the T/A housing on and also use guide studs . Don't worry about removal of the rubber band as it will dissolve over time .
 
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rustred
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PostPosted: Sun Jan 06, 2013 8:42 pm    Post subject: Re: What I found today Reply to specific post Reply with quote

when i worked in a gm garage in the 80's the diff marking compound was yellow.
 
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CenTex Farmall
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PostPosted: Sun Jan 06, 2013 8:45 pm    Post subject: Re: What I found today Reply to specific post Reply with quote

Good progress!

Diesel is great for cleaning in there. I use a one gallon pump sprayer and a couple of 5 gallon buckets under the front and rear to catch the drainage. Get a big funnel and make a "filter" out of a paper shop towel and then refill the sprayer from the 5 gallon buckets. Save the dirty diesel and over time the metal bits settle out and then you can use it again when you clean out the next one.

The marking compound for the gear pattern is just thick colored grease that wipes away and reveals the contact area. I think a small tube of artist type oil paint would work. It doesn't take very much.

The shield does go to the inside. Helps keep the grease from migrating away from the bearing when you're plowing with one wheel in the furrow.

I would pull each axle housing off separately for cleaning as a lot of trash can hide up in there. I like to use Permatex Ultra-black silicone for sealing in lieu of gaskets.
 
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Tim Yates
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PostPosted: Mon Jan 07, 2013 3:59 am    Post subject: Re: What I found today Reply to specific post Reply with quote

If you want yo use the H axles you will have to use the H bull gears as wel. You will also have to make a sleeve to go on the axle on the inside where it goes through the inner bearing,the H axle is a little smaller there.a lot of work to shorten axles easier to cut yours off.
 
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Zachary Hoyt
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PostPosted: Mon Jan 07, 2013 4:37 am    Post subject: Re: What I found today Reply to specific post Reply with quote

Thanks, I have decided I will just leave the axles as they are for now. At some later point I may cut them off, but I will first have to figure out a way to do it neatly.
Zach
 
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Zachary Hoyt
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PostPosted: Mon Jan 07, 2013 4:40 am    Post subject: Re: What I found today Reply to specific post Reply with quote

Thanks, I will pull the axle housing on the left first because it needs a gasket and I will clean it out inside. I didn't realize how the bearing shield was supposed to work. Some of the H and Super H axles I have pulled have had the bearing the other way, but I was not putting them back together so I didn't have to think much about it.
Zach
 
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Zachary Hoyt
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PostPosted: Mon Jan 07, 2013 4:44 am    Post subject: Re: What I found today Reply to specific post Reply with quote

Thanks, the tip about the rubber band is a great idea. I would not have guessed that I could do that and leave it in there. When you say "coast" I am not sure what that means in this case, but I do understand what you are saying about the used parts being worn. The book says that the gears are supposed to mesh only near the toe of the tooth when they are not under load, but I think from what you are saying that that would no longer be true of a used set? Thank you very much.
Zach
 
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Zachary Hoyt
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PostPosted: Mon Jan 07, 2013 4:48 am    Post subject: Re: What I found today Reply to specific post Reply with quote

Thank you very much. I had not thought about air but I will definitely use it. The bearings seem to have retainers that hide the balls themselves but I do see how to check the races. I am wondering if the pattern should be uniform from the root to the crown of the tooth or from heel to toe? Would I ask for Prussian Blue at an auto parts store or somewhere else? Thanks for the help.
Zach
 
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Zachary Hoyt
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PostPosted: Mon Jan 07, 2013 4:49 am    Post subject: Re: What I found today Reply to specific post Reply with quote

Thank you both, I didn't realize that marker would work. I will try to get Prussian Blue if it can be had locally.
Zach
 
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Zachary Hoyt
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PostPosted: Mon Jan 07, 2013 4:50 am    Post subject: Re: What I found today Reply to specific post Reply with quote

Thanks, I appreciate the help.
Zach
 
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