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Discussion Forum
Show Parts for Model:

1850 over-underdrive transmision troubles

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Author  [Modern View]

10-07-2012 12:23:24

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Have two 1850 series desiel oliver tractors with the over-under intermediate transmission. Both transmissions have lost their low under and overdrive features. Is the any possibility I could trade a new autographed "Santa's Reindeer Hay" story book for the manual copied pages dealing with the teardown and rebuilding these hydralic transmisions.


Santa's Reindeer Hay - Welcome

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Olarry from maryland

10-07-2012 14:28:54

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 Re: 1850 over-underdrive transmision troubles in reply to Fern(Mi), 10-07-2012 12:23:24  
The one tractor i had the over and under go out the 4 bolts holding the gear and that other piece together broke.Really two backed out and the others broke.

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10-07-2012 14:25:54

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 Re: 1850 over-underdrive transmision troubles in reply to Fern(Mi), 10-07-2012 12:23:24  
i rebuild those units , and can be very costly , depends on what gone , i have after market parts supplier , the parts come in agco bags ,fiqure that one out , price is a lot cheaper can build for farm or pulling if you need help let me know thanks 414 379 8485

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ollie gm

10-07-2012 14:11:45

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 Re: 1850 over-underdrive transmision troubles in reply to Fern(Mi), 10-07-2012 12:23:24  
That sounds like a deal!

I have 2 versions that are available in PDF format complete with highlighted notes for tests and procedures.

One is the original that came from the 3 spd chapter in the Oliver service manual.

The other is the I&T version which is nice because it includes all the different updates with details through the years. I like it because all the excessive language that Oliver uses is eliminated and cuts to the bare facts.

Let me know if your interested. Like John mentioned, it looks like you'll need sprag clutches and a couple of gasket sets for a start. If you are going with Ag-Co parts (recommended) get a grip on your jaw to keep it off the floor when the price is quoted.

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J. Schwiebert

10-07-2012 13:10:59

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 Re: 1850 over-underdrive transmision troubles in reply to Fern(Mi), 10-07-2012 12:23:24  
If the low range is out the sprag clutch is out. Have you checked the pressures on the direct drive & the overdrive clutches?

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