SC wet clutch

Tom R S · Dec 7, 2012

In a recent post the subject of the wet clutch was touched on briefly. My 1945 SC clutch has always worked great and I've wondered why the oil doesn't cause it to slip.
What was the whole idea of this design and why the oil? Was it to extend the life of the plate and disc?
It definitely works well - just wondering.
I drain the clutch hsg with the crank case when I do an oil change and it comes out pretty milky.

old · Dec 7, 2012

You also have to remember it is not the common foot type clutch but an over center hand clutch and those work a bit different then a foot clutch that uses springs on a pressure plate where as an over center is a + locking set up

Anonymous-0 · Dec 7, 2012

Almost hydro, handy as can be

D G Wells · Dec 8, 2012

Tom, Look up "Case LA Tractor Split" in this forum and look at the fifth picture down and you will see the oil holes in the pilot shaft of the tranny. The oil flows out of the crankshaft into the pilot shaft then sprays out right in the clutch, keeping it wet all the time. This prevents wear. The oil then flows back into the engine oil pan via a large hole in the engine casting at the back of the engine. ---Derrol in Texas---

Anonymous-0 · Dec 8, 2012

the oil gets back to the engine through a catch trough on the upper left hand side of the bell housing, the flywheel slings the oil into the trough and through a hole in the back of the block flange

John Saeli · Dec 8, 2012

All SC's & DC's, hand clutch, or foot clutch, used a wet clutch. Can't explain why they don't slip, but you have an internal engine problem causing the milky oil. Could be a leaking Sleeve O-ring, blown head gasket, cracked head, or cracked sleeve. Needs attention before you damage the lower end.

Jimmie D.Phelps · Dec 8, 2012

It makes no difference if it is a hand clutch or a foot clutch. The oil just oils everthing and dispates the heat if the clutch is first engaged once the clutch is engaged the plate no difference from a dry clutch. Even John Deere came with a oil bath clutch in some tractors , it got it's lube from the transmission. And doesn't the Case tractors with powershift use it and it works more like a dump valve?

Jimmie D. Phelps · Dec 8, 2012

I think the oil bath clutch and chain final drive was the best two things Case ever built. The tapered axle on the 500's threw the 930's was a mistake as the milled keyway was a source of the axles breaking. Though they never broke until the axle crystalized and just the last 1/2 in broke. Ask Mert Miller. He seen a lot of them and they all looked alike.

SC wet clutch

Tom R S

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old

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Anonymous-0

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D G Wells

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Anonymous-0

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John Saeli

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Jimmie D.Phelps

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Jimmie D. Phelps

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