Bob- I am going to assume you have a "newer" style orange F-10 and not the green one. Ours has the extra valve and plumbing for the push-off for stacking hay, so again I will assume it can be used for a grapple. Here's how it goes: The pressure line comes up on the left rear "upright" near the reservoir parallel to the pressure line that feeds the main control valve. The line goes in the rear of the pushoff/grapple control valve. The two lines going to the grapple cylinder come out the top (not sure which is which, but pushing the valve lever to the left (in) will return oil to the reservoir). The return line from the grapple valve comes out the front and threads into the front of the main control valve, in line with the line that goes out the back of the main control valve to the reservoir. One other thing- the pressure line feeding the valve has a "y" in it and the "y" ties into a cast part (part #2716 or 2718) that connects to the other return lines above the tank. I assume this is a relief valve of some sort. I will add that I personally have never used this extra control valve because we no longer make the big hay stacks, but this is how it is still plumbed. Sorry for the lack of pictures and the long post, but I hope this helps some.
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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