Hi ive got an older case 688 I think it's around 1987, it was retired from excavation and has been used around our farm for a while now. Recently it all of a sudden started having a problem...When you start the machine and start moving the controls the engine stalls and won't start back up. The only way you can start it is if you relive the hydraulic pressure by cracking a relief valve. It seems like there's way to much pressure in the system and something is not letting the fluid back to the resivor. Not too sure any suggestions would be helpful thanks
Case 688 hydraulic problem
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