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-   -   915 gearbox input shaft seal question (http://forums.pelicanparts.com/porsche-911-technical-forum/412388-915-gearbox-input-shaft-seal-question.html)

Sgrun 06-01-2008 07:27 AM

915 gearbox input shaft seal question
 
HI,

I'm lucky enough to have a 72 915 with the internal seal. I've installed a new seal from Pelican, but it seems too long & the lip of the seal is past the machined surface on the shaft.

See photos - is the seal in backwards? Seems like the spring, etc. should be to the oil side (it matches the orientation shown in the Haynes manual). When the input shaft is fully inserted, the seal is well beyond even the radiused area & sits on the minor diameter of the shaft.

Picture one is the sealing surface of the shaft sliding through.

Picture two is fully inserted.....

Did I get the wrong seal somehow?

Thanks,
Stevehttp://forums.pelicanparts.com/uploa...1212333877.jpg
http://forums.pelicanparts.com/uploa...1212333925.jpg

john walker's workshop 06-02-2008 06:01 AM

strangely enough, for a '72, the seal goes the other way. lip out. you might want to search for the grady clay thread about using another seal as a dam on the outside of the 1st seal and having a drain hole between them.

Jim Richards 06-02-2008 06:21 AM

Here's some (hopefully) interesting reading:

http://forums.pelicanparts.com/porsche-911-technical-forum/196173-input-shaft-seal-problem-915-mag-case.html

http://forums.pelicanparts.com/porsche-911-technical-forum/166535-transmission-input-shaft-oil-seal-69-whats-involved-replacing.html

Check out Grady's drawing about 2/3rds the way down the page, where he talks about the 915 dam seal modification:
http://forums.pelicanparts.com/porsche-911-technical-forum/173143-replacing-901-tranny-shift-shaft-seal.html


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