Primary seal direction

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Mar 29, 2019 | 06:36 PM

madwrencher

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From: ohio

Primary seal direction

Im replacing the inner primary seal. The one that faces the drive sprocket. The original one is marked oil side and compared to an ordinary type seal looks like its installed backwords but its not. The new seal is a james gaskets and looks different. Like an ordinary type seal. Does the new seal go in like the original seal lip out or flat side out?

Mar 29, 2019 | 06:49 PM

madwrencher

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From: ohio

03 wide glide

Mar 29, 2019 | 06:54 PM

RDHIGH

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From: Winnipeg

Install the new seal the same as the old one- unless youv'e changed to a 'dry' primary (like a belt drive primary)

Mar 29, 2019 | 07:04 PM

brownie4412

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From: Ohio

General rule of thumb with shaft seals is the flat side faces away from the fluid you’re trying to contain. That seal is there to keep transmission fluid in the transmission. So the flat side will be facing you when you install it.

Last edited by brownie4412; Mar 29, 2019 at 07:15 PM.

Mar 29, 2019 | 07:08 PM

madwrencher

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From: ohio

Thats what i would think because then the spring on the seal would be on the fluid side like the orginal seal.

Mar 29, 2019 | 07:11 PM

brownie4412

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From: Ohio

Quote:

Originally Posted by madwrencher

Thats what i would think because then the spring on the seal would be on the fluid side like the orginal seal.

is it behind the pulley or before it? I may have told you wrong as I was thinking that is the main shaft seal. Either way the same principal applies. Flat side away from oil.