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Case SC Oil Leak @ Rear Main

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wayne

07-06-1999 13:58:43




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I understand SC does not use a rear main seal. Mine leaks where the pan fits against the clutch housing and also the clutch housing gets some oil in it. I don't understand how the pan is gasketed against the clutch housing, it looks like it has a large flange that extends down across the clutch housing and I don't see why oil should leak past if there is a gasket between the pan flange and the housing. Does anyone know the principle here, how did they plan to do without the rear main seal? I guess there is a slinger to do its job. Also why did Case put a drain plug in the clutch housing, did they expect oil to get in there?

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Tom S.

07-09-1999 10:39:51




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 Re: Case SC Oil Leak @ Rear Main in reply to wayne, 07-06-1999 13:58:43  
The Case SC is designed to have oil in the clutch housing for proper operation of the "wet clutch", thus the drain plug.
The oil in the crankcase does circulate in and out of the clutch housing.
It is a good idea to drain the clutch housing periodically for that reason.
When I first drained mine I got a lot of heavy oil and crud out which had been there for a long time I'm sure.
As for the seal at the rear main I think the pan simply saels against the rear bearing housing and the transmission casting.
Putting the pan on is tricky due to the horizantal block surface and the vertical tranny surface.
Hope this helps.
Let me know if you resolve your leak.

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Wayne

07-16-1999 09:17:54




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 Re: Re: Case SC Oil Leak @ Rear Main in reply to Tom S., 07-09-1999 10:39:51  
Thanks TomS Are you sure the clutch is a wet clutch? Mine is a foot operated clutch not a hand clutch and is one of the later Case SC tractors. I thought it was a dry type. If you are right then I have a bad pan gasket seal and you are right about the difficulty to seal both the block and the clutch housing at the same time. I will check with the local mechanics here and will be glad if all I have to do is replace the gasket.

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SBATCH

08-18-1999 18:56:22




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 Re: Re: Re: Case SC Oil Leak @ Rear Main in reply to Wayne, 07-16-1999 09:17:54  
I JUST REBUILT MY CASE SC AND MINE IS THE SAME. BUT THE CLUCH DOES NOT SLIP. THE BACK OF THE MOTER IS CUT OUT I HADE MINE IN 3 PCS WHEN I STARTED MINE I HADE OIL COMING OUT BYE THE STARTER SO WE CUT A TUBE AND MADE MORE GASKETS AND IT WORKED GREAT IF YOU NEED PARTS I HAVE A PARTS TRACTOR



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Tom S.

07-19-1999 10:22:30




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 Re: Re: Re: Case SC Oil Leak @ Rear Main in reply to Wayne, 07-16-1999 09:17:54  
I assumed all SCs had the wet clutch. You may be right about the foot clutch being dry. Mine is a 1945 with a hand clutch.
As for sealing the gasket, I used yellow weatherstripping adhesive when I put my pan on and that was in 94 - so far no leaks.
Let me know what you find out about the clutch. I will also check my references and if I find more info. I'll let you know.
What year is your tractor?

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Toms

07-23-1999 09:27:30




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 Re: Re: Re: Re: Case SC Oil Leak @ Rear Main in reply to Tom S., 07-19-1999 10:22:30  
My tractor is a 1953 model and there is definately oil in the clutch housing and I hope it is supposed to be there. I think so since it fills up immediately after I drain it and restart the engine. I tightened up all my pan bolts and have narrowed the leak to only a drop or so now. I will bet that Case did not want to retool the pan and clutchhousing design putting in a seal, etc so they just let the oil be there below the dry clutch if indeed they put a dry clutch in when they went to the foot clutch. I just don't know!

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Tom Marabello

08-05-2002 22:45:33




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 Re: Re: Re: Re: Re: Case SC Oil Leak @ Rear Main in reply to Toms, 07-23-1999 09:27:30  
Tom, The clutch on your '53 sc is a wet clutch. I had a '53 sc for 14 years before I sold it to my brother-in-law. the clutch was wet then and it is wet now. If you get hold of a manual, it will show you the open design of the crankcase, and should ease your mind. Tom Marabello



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