I have a big problem. On my '94 9500, my feederhouse raise/lower, reel raise/lower, fore/aft, and auger swing will not work when the machine is on HIGH IDLE with seperator and header IN GEAR. However, I can kick it all off and idle it down and it will resume working as it should. Once I kick it all back in and speed up, it will quit working after 10-15 secs. I can still drive, steer move and run, but none of the things mentioned will work. We checked the pressure at the valvestack, and it's running 3100 psi at idle, but will drop to 30-35 psi after 10-15 secs of running full bore. Mechanic and John Deere guy said I may have lost the key, or broke the shaft that runs that pump which supplies flow to the valvestack that controls the functions mentioned. Anyone else have any opinions? I'm sitting in the the field right now, trying to harvest my best field. Thanks!