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JD 830 Engine Oil in Transmission

U

US244963

New User
My 1959 JD830 (electric start) has started leaking engine oil in to the transmission. Doesn't leak when just sitting (eng not running). But when running, will loose about 1 quart per hour of running in to the trans. I understand there is a PTO shaft seal on the timing gear side that could cause enging oil to leak in to the transmission. I also understand it could be the seals on the crankshaft on the belt pully side causing engin oil to flow in to the 1st reduction gear case and in to transmission. My question is- does anyone know which side is most likely to be the problem. Both of these are going to be quite labor intensive to get at- so I want to start on the side that is most likely to be the problem. Does the fact that it only leaks when engine is running mean that one of these is more likely? Appreciate any help I could get. Thanks! Jeff.
 
When you say "right side" seal do you mean the PTO seal behind the flywheel? or are you thinking it is the main seal on the belt pully side? Seems like most guys feel the PTO seal is the culprit.
 
Hi . Thanks for the response back. I appreciate it. seems most feel it is this PTO seal then vs. the main seal on the belt pully side. Just curious why you feel that way? Is it not that common that the main seals on the belt pully side can leak? I know there is some drain tube on that side that I have heard can get plugged and cause engine oil to run in to 1st Reduction gear cover (runs in Trans oil). I suppose there is no way to know for sure.. but hate the thought of tearing in to something that won't cure the problem.
 
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