1953 Ford 8N
At first we had low oil pressure. It would start around 20psi and fall to 5psi. Then it wouldn't even make it to 20psi. Even so, it was not knocking. So we knew we needed to take a look -- fast.
I then rebuilt the oil pump, replaced the bearings that I could access while I was in there, and put everything back together. New gaskets. The oil pump pickup tube had to be welded, but I am pretty sure that is secure.
We started it up and got about 20psi. The tractor held at 20psi for a few minutes and then fell again. It has been without oil for a while, so we have "primed" it repeatedly.
We loosened the oil gauge a little until oil dripped out because there was definitely a bubble in the line going to the oil gauge. But now that has been resolved, and we are getting NO oil pressure.
It has since decided that KNOCKING is a good idea -- and not a subtle knock. Oil is not being circulated consistently, but each time we prime the oil pump, it gives us oil pressure.
The old bearings were NOT in bad shape, but we replaced the ones we could access with the oil pan off.
We primed the oil pump again and it was at 20psi once more. But again it fell to 5psi. While at 20psi, the knocking stops. It was NOT knocking before, even at low pressure.
We are using 20w40 oil with oil stabilizer.
Any thoughts?
At first we had low oil pressure. It would start around 20psi and fall to 5psi. Then it wouldn't even make it to 20psi. Even so, it was not knocking. So we knew we needed to take a look -- fast.
I then rebuilt the oil pump, replaced the bearings that I could access while I was in there, and put everything back together. New gaskets. The oil pump pickup tube had to be welded, but I am pretty sure that is secure.
We started it up and got about 20psi. The tractor held at 20psi for a few minutes and then fell again. It has been without oil for a while, so we have "primed" it repeatedly.
We loosened the oil gauge a little until oil dripped out because there was definitely a bubble in the line going to the oil gauge. But now that has been resolved, and we are getting NO oil pressure.
It has since decided that KNOCKING is a good idea -- and not a subtle knock. Oil is not being circulated consistently, but each time we prime the oil pump, it gives us oil pressure.
The old bearings were NOT in bad shape, but we replaced the ones we could access with the oil pan off.
We primed the oil pump again and it was at 20psi once more. But again it fell to 5psi. While at 20psi, the knocking stops. It was NOT knocking before, even at low pressure.
We are using 20w40 oil with oil stabilizer.
Any thoughts?