Posted by gbs on January 17, 2021 at 07:56:38 from (71.217.169.122):
To start with I would have posted this on the Ford forum but little if any info is discussed about the New Holland tractors there. We have a nh t6030 plus with a ccls hydraulic system with mechanical controls and a loader with the center control valves that when a hydraulic function control lever is moved the pump will stay in demand even though the control has been released, this happens randomly no matter which control is moved. All valve spools have been checked are returning to center, when this happens you can bump any of the other controls including the loader and the pump will go off demand. When I mention demand I am trying to keep the operating principles of the pump simple i.e. no demand it is operating with stand by pressure only, on demand it is suppling operating pressure. Any advise would be appreciated as I am having trouble finding very much information about the system on this tractor. Dealers are reluctant to tell me anything even though the repair parts will come from them , I bought a nh shop manual for it and of course it covers several different tractors for that model with different hyd systems and the information contained in it for the system we have is lets just say is liking at best and scattered thru its 4400 plus pages .
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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