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8970 transmission control vavle
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coastalBend
Posted 12/7/2016 17:16 (#5682720)
Subject: 8970 transmission control vavle


south texas		Got my trans back in. 24spd. jd came to check Pressure. Clutch pressure is about half of what system pressure is. From reading tech, the clutch valve or gasket behind control valve are the only 2 things to do without disassembly of the transmission. Any ideas. Planning to pull control valve and let jd look at it. Jd just did the 2 spd bench job. I don't know if this includes the traction clutch or not.

I had control valve off summer of 2015. Didn't see any damage but don't really know what to look for. Lots of debris went through trans when 2 speed failed
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Fencepost
Posted 12/7/2016 18:11 (#5682834 - in reply to #5682720)
Subject: RE: 8970 transmission control vavle


You've had your share of troubles with that tractor. So it sounds as though the last time you said the trany went it was just the 2 speed?
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coastalBend
Posted 12/7/2016 18:54 (#5682966 - in reply to #5682834)
Subject: RE: 8970 transmission control vavle


south texas		Thats what jd said. I still don't like the way it sounds.
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RB7520JD
Posted 12/8/2016 11:21 (#5684436 - in reply to #5682720)
Subject: RE: 8970 transmission control vavle


EC Nebraska		Had the same problem with my 8970. Low clutch pressure. Found the clutch valve operating fork was bent, not allowing full clutch valve travel. Part # R62043. Might be worth a look.
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coastalBend
Posted 12/8/2016 17:32 (#5685072 - in reply to #5682720)
Subject: RE: 8970 transmission control vavle


south texas		I dont know if this is bent but fork is flared out and pin hole is wore out. Putting new arm, valve springs and seal.



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Attachments 20161208_144617.jpg (96KB - 100 downloads)
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coastalBend
Posted 12/9/2016 15:57 (#5687038 - in reply to #5685072)
Subject: RE: 8970 transmission control vavle


south texas		Fork is bent



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RB7520JD
Posted 12/9/2016 21:18 (#5687675 - in reply to #5687038)
Subject: RE: 8970 transmission control vavle


EC Nebraska		Yes... that was how my fork looked also. Replacement fixed my clutch pressure problem. Good Luck!!
Also, Coastal, thanks for all the good info you have posted regarding the fan clutch issues. Been dealing with that on mine also.
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coastalBend
Posted 12/12/2016 18:31 (#5693577 - in reply to #5682720)
Subject: RE: 8970 transmission control vavle


south texas		Just posting that my pressure is equal to system pressure. It probably didn't need it but i put new springs in the clutch valve. This was all done without removing any other parts but the control valve itself.
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