I have an 03 case 75xt with 1400 hrs runs great but has weak drives on both sides there both equal of power won't even turn left or right will not push anything will go forward and back but will barley go up a hill. Warmer machine gets weaker drives get and I noticed if you put the machine on a hill once it's warm will fly back down like drive motors won't hold pressure and once warm and you try to move machine parking brake light kicks on and off I changed the filters and oil didt change anything I was wondering if that machine has a bypass valve on the tandom pump or if anyone had the same problem with there's
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