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1G CAS Rebuild - Inner Oil Seal?

Don Lang

Proven Member
62
0
Mar 5, 2008
Auburn, California
I have oil leaking out of the inside of my 1g CAS. Does not leak from the o-ring!
I'm looking for the SHAFT seal. New CAS are very expensive. I want to service the shaft seal. Has anyone found a seal? Got the o-ring at the dealer but no seal available.:confused: Anyone found one???
 

AllanL

Proven Member
272
22
Apr 24, 2008
LV, Nevada
having no hydraulic press at home, i used my reliable vise, a concrete nail, and a junk socket to press it out.

i remember soaking it in oil or wd40 at that time prior to pressing out.

a local machine shop might help you with this as well.

and merc is correct, replace the seal and the bearing...
 

dwb

Proven Member
136
52
Sep 9, 2021
Broomfield, Colorado
Does anyone know where to find the inner oil seal for the 1g green top CAS? Not the o-ring, but inside the CAS is an oil seal that seals the shaft. You have to disassemble the CAS to get to it. Unfortunately the seal wears out and oil gets inside the CAS and causes it to fail.

I know they exist somewhere...aftermarket electronics manufactures can source them when they build these sensors.
 

steve

DSM Wiseman
14,391
1,345
Feb 3, 2002
St. Charles, Illinois
90 or 91+?
I haven't got access to my spares here to take a look at what type of seal is requires but maybe you can find a match.


These guys are in Denver and might be able to help.

(This is really a bump to see if someone else might have more helpful information)
 

dwb

Proven Member
136
52
Sep 9, 2021
Broomfield, Colorado
90 or 91+?
I haven't got access to my spares here to take a look at what type of seal is requires but maybe you can find a match.


These guys are in Denver and might be able to help.

(This is really a bump to see if someone else might have more helpful information)
It's a 91+ green top. Thanks for the links. If I ever dig one of my old CAS out of storage I'll set the seal aside to see if any of these places can help.

Mine was leaking and I tried to take the pin out (without a press) and damaged the CAS.

I never had to pull the pin. Just disassemble it and the shaft pulls right out.
 

dwb

Proven Member
136
52
Sep 9, 2021
Broomfield, Colorado
I don't see how that's possible. Can you upload a video when you do this?
Just disassemble it all the way and gently tap the shaft through with a hammer. There's two press fit bearings. One sealed inside and one oil-fed sleeve (?) bearing on the other side of the seal.

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I don't have a good way to measure it right now but here's a good pic if anything can be gathered from the numbers.
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TK's9d2TSi

Supporting Member
6,250
3,246
Sep 11, 2017
Cincinnati, Ohio
Just disassemble it all the way and gently tap the shaft through with a hammer. There's two press fit bearings. One sealed inside and one oil-fed sleeve (?) bearing on the other side of the seal.

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Ah. I see. Dang it! I trashed my green top for no reason LOL. Thanks for the explanation 👍
 

dwb

Proven Member
136
52
Sep 9, 2021
Broomfield, Colorado
Finally got something better than a tape measure (thanks Santa). Here are the dimensions of the seal. Lots of hits on google, so probably won't be hard to find.
14x24x6

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dwb

Proven Member
136
52
Sep 9, 2021
Broomfield, Colorado
Question for the mods...how did my thread get merged with one from 2011?

That old thread has all kinds of wrong info like pressing out the pin to remove the shaft, buying this seal from the dealer, leading people down a rabbit hole of looking in CAPS, wrong suggested seal size, etc. The CAS isn't meant to be serviced so there are no dealer provided internal parts available.
 
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