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| This was a common complaint on the 5x25 series and I thought they addressed it on the newer E's and M's. Anyways, I'm assuming that all the other hydraulic functions work normally AND that the EH controls are set correctly, then you should check into that DTAC solution for the 25 series, it suggests that an adjustment is needed and how to perform it. My 5525 does the same thing when it's very cold but clears up with a little heat in the hyd. oil, so I live with it - one of these days I'll get around to adjusting it.
To clear up some things for you and to put your dad a little more at ease:
There is only one hyd. pump on these tractors, one circuit is dedicated to the tractor hydraulics, the other to the steering. I'm not aware of there being widespread problems with the pump.
Also, I'm not aware of any transmission seal that would cause the hitch lift problem, if there is it would be rare indeed.
Finally, the "park update" shouldn't apply to you, it was mainly centered on the 5x10 and 20 series and, to my knowledge, the problem it was designed to fix had been corrected when they introduced the 5x25 series.
If it's in warranty, contact your dealer, if it's out and the dealer won't help you (I think, they should) let me know and I'll PM you a link to a site where you can buy and download all the manuals cheaply.
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JD 5085m lift ?
