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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Re: Hydra Power mystery

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b a star

09-23-2012 21:46:43

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   Are you "coasting" back down the silage pile with the clutch down and the transmission still in the forward gear you used to get up the pile?  If so the lube pump is running backwards and sucking all the fluid out of the line and away from the input shaft and gears.  I have seen failures by doing this.

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09-24-2012 05:56:26

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 Re: Hydra Power mystery in reply to b a star, 09-23-2012 21:46:43  
No,I'm not coasting back down. When it wasn't right it would go in to free wheeling like you would expect in underdrive,but since it "fixed itself" it's holding in direct. Darndest thing I've ever seen is all I can say. It used to be slow and slipped in to direct slowly when it even went in at all,now it goes in with a distinct thud.

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OLarry from MD

09-24-2012 15:11:31

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 Re: Hydra Power mystery in reply to rrlund, 09-24-2012 05:56:26  
Heres a wild guess the presure relief stuck with some stuff from the overheated oil and now it makes more preasure.Years ago i had one that wanted to shift to direct all the time as soon as i started the engine.I ended up removeing the relief spring and it still did it.Ended up finding the return plugged by thick goo on the bottem of the unit.

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Mitch Poindexter

09-24-2012 06:42:29

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 Re: Hydra Power mystery in reply to rrlund, 09-24-2012 05:56:26  
If I send you a 3sp that is doing exactly the same thing in over, can you reproduce your results?

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09-24-2012 16:37:03

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 Re: Hydra Power mystery in reply to Mitch Poindexter, 09-24-2012 06:42:29  
I can drain it and run up and down the silo. Seemed to work for me. I'm starting to wonder if we all need to switch from Dexron to that Mercon/Dexron combo. Mine acts just exactly like something had been plugged all those years and all of a sudden popped loose.

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