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DC CASE Oil Leak at Starter Base

G

Glenn F.

Member
Just got to working with my DC again. I'm getting a steady oil leak where the starter enters the bell housing. Cork gasket is in place. Any idea what's causing this significant leak. Engine is not overfilled with oil.

Thank you,
Glenn F.
 
Perhaps you know this. The flywheel housing has a wet clutch. Oil slowly circulates from the engine to the flywheel housing and back to the engine. About a quart of oil remains in the housing.

The flywheel and starter ring gear slings oil up the right side of the housing, over the top and down the left side of the housing where a "funnel" is cast into the housing. The funnel catches slung oil and drains it back into the engine crankcase. The area of the starter pinion gets drenched with slung oil.

Therefore, a good seal is needed between the starter and the round hole it fits into. The people who rebuild my DC starters install a rubber oring in the circular groove in the starter. The factory and dealers may have used a cork ring or cork rope. The parts book calls it a packing. The part number is listed as O7299AB. If I recall correctly, the O is the letter O and not a zero.
 
Sounds like you have an SC starter on your DC. The DC's have a groove cut into the stater for a square oring to seal in the tractor housing.It can not be seen with out removing the starter. SC's have a cork gasket that fits betweeen the starter and the housing. It can be seen with the starter in place.

The SC starter will work, it is just a little lighter built. New gaskets for the SC starter are available from external_link. Below is a link.

Nick
Untitled URL Link
 
Now that I thought about it a little, if you have an SC starter on a DC the factory gasket may not seal properly. The DC housing may not be machined correctly for the SC starter. I bought a DC once with a SC starter and the previous owner had wrapped cotton string around the starter to seal it.

If you do have an SC starter you may have to "Engineer" a solution, such as a thicker gasket or try the cotton string trick. Another option would be to buy a DC starter with the oring.

Nick
 
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