Replacing the front fork oil seals. Some questions. - Page 4 - Ducati.ms - The Ultimate Ducati Forum
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post #31 of 41 (permalink) Old Mar 25th, 2019, 8:22 pm
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Originally Posted by ducvet View Post
Last I will add to this as we are getting war off topic.


i would have paid money to watch the blue rag go through the guzzi.
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post #32 of 41 (permalink) Old Mar 25th, 2019, 9:40 pm
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The ď way off topic ď threads are usually some of the best ones. Some topics are complicated and interrelated.

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post #33 of 41 (permalink) Old Apr 9th, 2019, 10:38 pm
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Confirming fork seal direction

Took the forks apart today to do seals.
The garter spring side of the old seals is facing down
toward the dust seal /axle end. Is this correct?
From what little I get from the manuals it may be......
The history of this bike has me questioning everything, and in
most applications the spring side of the seal is s'posed to go to the wet side eh?
Appreciate the help,
Jim

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post #34 of 41 (permalink) Old Apr 10th, 2019, 1:18 am
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photo will clarify what you mean.

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post #35 of 41 (permalink) Old Apr 10th, 2019, 10:01 am
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On the ohlins seal in my hand yes the spring is wet side.
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post #36 of 41 (permalink) Old Apr 10th, 2019, 11:01 am
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Showa seals

OOps my bad - the forks in question are the stock 1994 900cr Showa non adjuatable 41mm.
On close examination, the Haynes book photo appears to have the seal spring dry side, never run into this before....

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post #37 of 41 (permalink) Old Apr 12th, 2019, 4:21 am
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lots of forks seals have a spring both sides. larger spring and lip get wet.

photo will help get the answer you need.

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post #38 of 41 (permalink) Old Apr 12th, 2019, 7:20 am
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Normally any numbers or means of I.D. Face the dry side. There is a website devoted to showing which side is wet or dry, but I canít remember what itís called . It was something simple like ď fork seal identification ď orĒ fork seal types ď that I found by accident . Itís getting harder to figure out. They say to see which way the lips are angled, but some donít seem to be angled. Many of the seals Iíve bought have a spring on both sides, no I.d., and no instructions, or instructions that donít help at all. A simple picture of the seal installed the correct way would be fantastic, wouldnít it ?

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post #39 of 41 (permalink) Old Apr 12th, 2019, 8:06 pm
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More Lips

Trying not to over think this ! The LT Snyder book pretty clearly explains and illustrates the
seal weirdness - spring & seal ID imprint face the axle end. Normally I'd just re assemble same as it was originally but too many questionable things about this basket case.....
A couple o pictures to illustrate, and also the excellent use I put to an old bumper jack I'd almost
junked. Turned a three handed job into a piece of cake.
Thanks for the responses ,
Jim
Attached Thumbnails
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Name:	900fork (top_wet side).JPG
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post #40 of 41 (permalink) Old Yesterday, 7:42 am Thread Starter
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I've recently replaced some old NOK seals with new ARI seals.
For what I learned:

-The side with the numbers or ID faces down towards the axle.
-The seals have a circular gap on both sides. The smallest gap faces the axle. When thinking about it, this makes sense. The side with the smallest gap has the most material left for the seal driver to hammer on. The wet side has a wide gap with little rubber left for the seal driver.
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