Re: 930 case hydrolic systems

Subject: Re: Re: 930 case hydrolic systems

Comments:
: : 930 case with hydrolic problems has given me a new twist. Deciding to do some investigative work on some possible simpler : : solutions I deduced that the main pressure relief valve may be a likely and easy candidate to check. Well, after decifering criptic : : repair manuals and feeling very confident that I had indeed found the location of said valve I removed the plug which should : : have been covering it. But alas, there was nothing but an empty hole where a pilot type valve and housing should reside. How : : the #$@%$#@%$ can this be? How could it possibly have even operated at all without this vital piece? Does ANYBODY : : have any experience with the hydrolic valve assembly of a late model 930 case with Draft-O-Matic? Am I insane or stupid for : : not finding a seemingly simple (according to the manual) mechanism? Is it possible that the system would maintain enough : : pressure without the valve due to friction of the oil through the valve system to still move a cylinder which did not require much : : lift pressure? This is going to drive me crazy!! : I could take it no longer and called a Case IH Dealer. Lucked out big time, : caught somebody who has work on these things for years. The relief valve in : question is located on the "bottom" of the valve housing. It is visable from the : back but is not removable without removing the entire housing. Guess what the : next project will be! : Thanks anyway, Maybe this will help anybody having trouble with a case : hydraulic system. (BTW he stated that an easy check to perform without having a : pressure gauge is to remove any cylinders attached to the couplers and hold one : of the hydraulic levers in the up position with the warmed up tractor at pto rpms. : If the pump gets hot after approx 60 seconds then it is likely a bad pump. If not : the relief valve may be the problem. : seeyabye

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