Posted by pete 23 on June 24, 2013 at 13:40:28 from (74.32.227.210):
In Reply to: IH 706 3 point hitch posted by David Crombie on June 24, 2013 at 09:37:44:
The 706 hitch is sequential. In other words, it has first choice for hydraulic oil from pump. If the spool in hitch valve sticks in raise position the hitch will be fully to the top, cannot be raised any more even manually and you will have no fluid to aux valves. This used to happen quite a bit when they were new. I would take third arm, cover off rear and reach in and push the drop check valve actuating pin in and lower hitch. Then they would usually snap back into working order. Some had to be taken apart though and polished for free movement. Also, the engine will labor with hitch all the way up as it is still trying to go higher. You can put position control lever all the way down into action control and that will release the pressure on pump, but won't let hitch down.
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