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50, Oil dissappearing

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Walt in Jaxn, T

06-15-2002 20:39:51




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Started my 54 "50" all fuel today and ran it for 15 or 20 mins. on gasoline. got the temp up to 210 and let it run out of gas. i'd engaged the transmission in neutral to see if there were any noises-none, i did notice some slight lifter noise when alongside the valve cover, but, no noises that didn't belong no knocks pings thumps or slaps. for a carb that is in bad need of a rebuild it did well, the engine ran smooth, didn't speed up,slow down, speed up, slow down like most 2-cylinders i see today just ran at a steady plut plut plut till it ran out of gas. here's the problem, when i checked the oil to see if it might have some water in it, it was low two quarts. it didn't go out the exhaust and didn't run out on the floor. i'd noticed the rearend grease was very thin when i had checked it a few months ago, so how is the first reduction gear lubricated? from the engine like the A and B or is it lubricated from the transmission? if so then there is a seal on the crankshaft between the crankcase and the first reduction gear cover, right? how hard is this seal to replace if there is one there? the tractor has live P T O----- -Walt

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Clooney

06-16-2002 05:06:54




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 Re: 50, Oil dissappearing in reply to Walt in Jaxn, Tn., 06-15-2002 20:39:51  
Walt, you could very well be loosing oil into the trans through a failed R/H crank seal. The 1st reduction cover is lubed from trans oil & there is a seal(s) in the R/H main bearing housing that keeps engine oil from entering the 1st reduction cover & trans oil from entering the engine.
~It's kind of a pain to replace the seal(s) [it uses 2 back to back] because the PTO drive gear must be pulled from the crank to access the housing & seal area.
~The seals can be replaced without pulling the R/H main bearing housing but it isn't easy & it is easy to damage the cover or crankshaft. I always pull the R/H main bearing housing to make it is done correctly. ~Pack a little wheel bearing grease between the seals to lube the outer seal until oil finds it's way there & don't push the seals in so far that you cover the drain hole [if you cover the drain hole you will never stop the leak].
~If you pull the clutch fork bearing [4 bolts on the front of the 1st reduction housing] then pull the clutch fork, then drain the gear lube from the 1st reduction cover you should be able to run the tractor & look in there with a light to see if oil is pouring from the R/H seal. Or maybe just run the engine [with clutch dis-engaged] with the 1st reduction cover plug removed to see if engine oil comes out the drain hole..

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