Posted by rankrank1 on December 30, 2014 at 08:32:02 from (166.137.14.17):
In Reply to: Farmall H oil use posted by johnmcc on December 30, 2014 at 08:02:31:
Has this tractor sat a while? Was it one that was previously stuck and then freed up? If yes, rust in the cylinders could have damaged the oil rings or you might get lucky and they are only stuck.
After verify the airbox is not restricted, the little pipe that runs to the airbox is not restricted, any engine vents are not restricted. Most importantantly check that little pipe that runs from the front of the head to the governor top and make sure it is present, not kinked, flowing, and not restricted with crud.
If you find nothing, then I would pull the plugs, add some ATF to each cylinder. Let it sit a day or 2. Add some ATF or Marvel Mystery Oil in a reasonably strong concentration to the gas. Then hook it to an implement and work the snot of it and hope the oil rings free up.
Farmall h's do not have oil seals on the valve stems so they can pull a little oil there if the guides get worn but they would have to be worn real bad to cause what you describing unless that little pipe that I mentioned earlier from the head to the governor is not draining away the excess oil from the top of the head. Then even a head in good shape but without valve seals would pull excess oil in around the guides simply cause there is excess oil there not draining away
Temp fix would be to add umbrella style valve seals to the valve stems using an air chuck or careful rope and piston placement to hold the valve in place without removing the head. Course if the guides are worn really bad this will only be a short term fix but it would let you know it is indeed the problem.
If it ends up being in the valve guides then pulling the head and having a machine shop press in new valve guides would be the best fix. Machine shop Knurling the old guides back to spec would be a compromise fix but remember knurled repairs last half as long as new guides would. Course doing either of these necessitates doing a valve job and you might as well add new umbrella seals as an upgrade when all this is done too.
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