The pump may or may not be toast now, can't say. When you get her running you have to establish that it does not stay on demand and it is most likely to do that after it has completely warmed up. Did the .031 orfice actually have a hole that size. If it has or had a check ball in them they will pean that hole shut and the seat is hardened so very difficult to drill out. The ones that had check balls had a cross drilled hole for a roll pin to hold the ball in. Provided you have no other reason for system staying on demand, like bent or missing roll pins where you switch from single to double action, the problem is unduoubtly caused by wear in the hitch teledepth valve land that controls the passage to the orfice. What I have done over the years is to progressively drill the orfice size out until I get a system that quickly responds to lever movement but does not stay on demand. Neutral regulated pressure should run about 30 to 60 psi, not over 100psi. You need to install a gauge right at the pump and observe it as tractor is being worked in the field until you reach these conditions unless you feel your able to readily determine it by ear. They will get so hot you can fry an egg on the housing and of course ruin all 0-rings , seals through out .
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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