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Reverse Idler Gear Bushing Replacement

Posted: Sun Dec 16, 2012 7:48 am
by wfmdfm
While in the process of rebuilding my transmission I found the Idler Gear to have a lot of slop on the shaft. After checking the specs and miking the shaft and bushing I decided to replace the bushing. Searching the forum and reading the manual I found that it was more than just pressing out and pressing in a new one. I also found that this is a part that needed to come from the dealer. I am not a machinist but here is how I replaced the bushing.
The first step was to find one. TM does not have it so I found one at http://farmallparts.com/products/?view= ... t_id=26727
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The bearing was very thin and I did not dare press the old one out with the new one. I found a 12 mm Craftsman socket was just the tool to press it out.
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Using the arbor press it slid out very easy.
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Pressing the new one in was just as simple.
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The manual calls for reaming the bushing to some tight tolerances
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I was able to purchase a reamer that will adjust from 0.59375 to 0.65625. http://dewitt-tool.com/DWRRADJCreamers_adjustable.aspx I actual ended up getting a full set at Harbor Freight.
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Next was figuring out how to adjust it to what I needed. Once I messed with it I found that working the adjustment nuts on both ends of the tool that I could adjust to tight tolerances. Working with a micrometer I got it to where I needed to be and then checked each cutter for the proper measurement.
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I was good to go at that point. I held the gear in one hand and the reamer in the other and slowly worked the tool thru the bushing. Spinning the reamer as I pushed it thru.
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Not much is removed as you can see the small remains of what was reamed out.
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I put some fresh oil on the shaft and slid it in. I turned very smooth without any slop.
Wally

Re: Reverse Idler Gear Bushing Replacement

Posted: Sun Dec 16, 2012 12:33 pm
by Criswell
Concise and to the point. Only two things I would add, use some oil before pressing in the new bushing and cutting fluid/oil when reaming, and do not reverse the direction of the reamer (always turn clockwise).