I have a 763 and the tilt valve sticks when the pedal is pushed full foward [dumping bucket], it sticks and bucket does not move. If I bring it back about half way bucket dumps fine. I have replaced the seal and inspected the spool and did not see any damage. I have lifted the cab with it running and it is shooting fluid out the little hole in the cap only when valve is in the full tilt [stuck] position. All other hydraulic functions are working fine. Does anyone have any suggestions.