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Reload this Page 1811 flywheel side oil seal.
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  #1  
Old 07-15-2018, 10:25 PM
Eslenk Eslenk is offline
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Default 1811 flywheel side oil seal.
I'm replacing the flywheel side crank seal in my 1811 with the correct Kohler seal.
Should I lube the seal where it rides on the crankshaft on do you leave it dry?

The reason I ask is I've replaced crank seals on a few Cummins diesels over the last few years ( yes, I know not exactly the same) and the seal specifically says it MUST be dry to seal correctly.

I was wondering if the same holds true for a 18hp magnum.

Thanks.
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Old 07-15-2018, 10:30 PM
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Lube the seal.
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Old 07-16-2018, 12:22 AM
J-Mech J-Mech is offline
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I've put in a lot of engine seals in Cummins..... This is a totally different type of seal.

Lube the crank before you slide it on. Oh, if you want to put some on the lip with your oily finger, that's ok too. But keep the outside of the seal dry. No oil. No silly-cone. No sealant.... DRY.
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Old 07-16-2018, 08:20 AM
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It is a good idea to wipe the case bore with solvent like lacquer thinner so it is free of oil, A "Q" tip works, as the area is small to work in.
I don't lube the crank as it is too easy to get it on the case bore,
but do lube the seal lip with grease to insure it don't start dry.
Make sure it goes in straight as they are a thin seal and easily cocked.
The Kohler factory seals used to come prelubed in the lip
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Old 07-16-2018, 09:25 AM
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Jon is right, Cummins is a different seal, multi-lipped Teflon, and must be installed dry. The seals used in your Kohler are most likely Viton, or in some cases of leather (CR) and must have a light film of lube on the lip.
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Old 07-18-2018, 10:11 PM
Eslenk Eslenk is offline
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Thanks for the advice all who responded.
The 1811 is back up running and cutting grass.
Sure was overdue for a cooling fin cleaning.
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Old 07-18-2018, 10:36 PM
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Quote:
Originally Posted by DieselDoctor View Post
Jon is right, Cummins is a different seal, multi-lipped Teflon, and must be installed dry. The seals used in your Kohler are most likely Viton, or in some cases of leather (CR) and must have a light film of lube on the lip.
I just put a rear main in a Cummins today as a matter of fact. I even did it without pulling the rear cover, or adapter housing.
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