IH 1086 - Running Away / free wheeling / brakes problem

[strongstockfarm]

I have an IH 1086 that will run away after about 30 mins of running. Whether the TA is in high or low range, after about 30 mins the transmission will not hold me back going down a hill and it will free wheel and get out of control fast. The brakes also do not work at this point. The point being about the time the hydraulic would get warm. Ive been told brakes, new hydraulic clutch. I changed te filters and that did not help. any help on diagnosing would be appreciated. - Stuart

[doohicky]

Is you TA applied when gong down hill?

[RickB]

You have problems within the multiple control valve low pressure system. A single pump supplies oil to the TA, steering and brakes, and it is not for some reason. Time to buy a service manual and pressure gauge, or hire somebody that knows these tractors.