F.K. said: (quoted from post at 07:26:46 06/27/11) Oil pump shaft and seal appear OK. Could a faulty safety valve block possibly be causing excessive psi and blowing by the good seal in the pump to the crankcase?
Not being familiar with most individual models of tractors, I don't know where a pressure test port might be, but it most likely has one. Find that and install a guage, probably one capable of 3000psi will do. Again, not sure what a 300 system pressure might be, but I'd check that agaist the specs... someone here no doubt knows what that is, but being a gear pump from that era (1950s), probably no more than 2500psi. Run your cylinder to the end of the stroke (dead-head it) and read the pressure. If it's noticably higher than the spec, that could be the problem. That's about the only way you can tell anything... put a guage on it.
This post was edited by IH fan at 06:02:06 06/27/11.
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