The safety valve is actually the relief valve. It limits max pressure. Safety valve with snap ring on it goes into small bore first, then spring cup and spring goes inside of cup. Regulator valve piston goes in with the long pin in first. It has o-ring on it. Long pin part of piston goes in first. you should be able to push piston down and feel it pushing lower ball off it's seat and it should move back up on it's own when you release it. The orfice screen drilled to .031 is correct. That is the size of new ones since 1958. If you drill it out too big the system will not go on pressure. Did you cut the end of screen off so you could clean screen and then roll it up just enough to seal. If not, crud could be inside and plug orfice. The other things that can cause your problem are , like I said before, the single to double selector. I have seen them bent out of shape inside so they are not actually positioning the spool in the proper position. When it goes on demand and stays there, that tells you more oil is flowing through the regulator port than what the orfice can supply to piston, thus piston moves up and ball closes. That is exactly what you do when you move from neutral to demand. The regulator port is blocked at the valve when in neutral. When you move lever spool uncovers regulator port and dumps more oil than the other end of that regulator port in regulator valve can supply oil through the orfice, thus, pressure is built. When set to single action, movement of lever to lowering position, the regulator port stays covered thus system does not build pressure. If the do hickey in valve that turns spool to single and double is bent or broke, hard telling what position that land on the spool is so it may be port may be uncovered all the time thus you build pressure even with lever in neutral.
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Today's Featured Article - Pitfalls of Tractor Engine Rebuilds - by Chris Pratt. The first pop after you have put the machine together with your own hands is exciting and pleasing. The whole experience can be marred if one moves too fast and makes too many assumptions that they can just use "as is" some parts they should be closely scrutinizing and possibly attended to. In such cases, rework makes what could have been a fun project turn into an irritant or even a nightmare. Minor Irritants To give you an example of an minor but irritating proble
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