915 Input Shaft Seal Installation in Guide Tube

[2jmotorsports]

Dear Pelicans,

In which side should a new input shaft seal be pressed into a 915 guide tube? From the A side or B side indicated below?



Gearbox is a 1983 915.

Also any other tips on installing the new seal? Install dry or lube?

Thanks in advance!

[proporsche]

Hi,i have a tool which is marked how deep the seal should go .I do it from the A side.Actually if look closely there is a end lip to which the seal should go to or ended up at...B full-arrow end on the pic...
Ivan

[2jmotorsports]

Hi Ivan,

I just removed my old guide tube and seal (which look probably original) and it was installed from the A-side. You are right it was right up against the lip and the end of the B arrow. I was just confused because the Bentley manual only states "press out old seal, press in new seal" and no other details. Also the original photo above (before I added the red arrows and text) kind of make it seem like the seal should be installed from the B side.



If it goes in from the A-side, that is a really long distance to drag the seal surface along the bore of the guide tube. Do you recommend some kind of lubricant?

[proporsche]

I have never used any lube there to install it..maybe some other boys do i would not know.I have never seen a Bentley book.
First time i heard about it( i guess here), it sounded funny to me Bentley tell us how to work on Porsche;-)
Ivan

ps.
do not worry about the installation just make sure you are going strait in.I have a pipe which has a inner diameter as the tube for installation.
And one more thing , do not forget to replace the tiny o ring!! very important...also lube the tube on outside too for the TO bearing to slide nicely on it.I use Sachs lube...

[2jmotorsports]

I appreciate it Ivan!

[kevingross]

Pack the inside of the seal with grease, which is done to help make sure the "gaiter" stays in place. The gaiter is the metal spring loop. Smear a little grease on the outside of the seal to help it slide into position and avoid catching / cutting the seal's rubber surface.

[Gordo2]

Here's how I did it:
Gordo's 915 Transmission Rebuild

Good luck,

Gordo