Author Topic: Fork Seal Question on 750k4  (Read 1054 times)

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Offline Kouros

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Fork Seal Question on 750k4
« on: May 10, 2010, 07:31:39 PM »
My forks were not leaking. But I have disassembled my forks any way to do cosmetic work on the lower fork's aluminum. Any reason I should change those any way? And If so, whats the best way. I found a couple threads on the subject but really did get a good explanation on removing the oil seals...........I'm just not sure if I should mess with this. They seem in good shape. Wadayathenk? :-\

Thanks.
-K
1974 CB750 K4 (Re-build in-progress)

Offline DHolbrook

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Re: Fork Seal Question on 750k4
« Reply #1 on: May 10, 2010, 07:41:19 PM »
Why not change them?  They're not expensive or difficult, especially if your forks are disassembled already.  I used 5 min. of fork lowers in boiling water and popped those seals out with a broad screwdriver.  While still hot I installed the new seals with ease using the old seals to tap against.  Just be sure to get the seal right side up (and use an oven mitt)!  Then you know you're good to go for another 30 years.  Easy Breezy.

Offline ekpent

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Re: Fork Seal Question on 750k4
« Reply #2 on: May 10, 2010, 08:40:42 PM »
Why not change them?  They're not expensive or difficult, especially if your forks are disassembled already.  I used 5 min. of fork lowers in boiling water and popped those seals out with a broad screwdriver.  While still hot I installed the new seals with ease using the old seals to tap against.  Just be sure to get the seal right side up (and use an oven mitt)!  Then you know you're good to go for another 30 years.  Easy Breezy.
Glad you got those seals fixed right DH.   For poster if you go into the project make sure you have all the bits that you will need. One day project could turn into 2-3 if not prepared.

Offline jaknight

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Re: Fork Seal Question on 750k4
« Reply #3 on: May 10, 2010, 09:43:26 PM »
Say Kouros,

Here's a good link with some good graphics and a written step
by step procedure:

http://www.salocal.com/sohc/tech/frkng/frkng.htm

Good luck with things, it's really very easy.

   ~ ~ ~ jaknight ~ ~ ~
"THE PEN IS MIGHTIER THAN THE SWORD........
..........EXCEPT IN A SWORD FIGHT"
___________________________________________
"There is nothing new under the sun.........But there are many old things we do not know"
BIBLE ---> Basic Instructions Before Leaving Earth

Offline Kouros

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Re: Fork Seal Question on 750k4
« Reply #4 on: May 10, 2010, 10:27:06 PM »
Thanks for the link. Now I got more questions. Mine is now all apart, but reading that link, I don't get the point of the broom stick! Mine was all disassembled easily.

I opened the bottom bolt, let the oil out, compressed the shock and got some more out, opened the top bolt, dumped the oil, removed the circlip, removed the bolt from the bottom of the lower and everything slipped right out except the seal and the seat with a large flange (not sure what its called). So once I follow the instruction for using hot water, I should be good. Right? Same technique to put everything back. Where does the broom stick come in? Got to mention that my shocks were out of the bike. If the broom stick is for stopping the valve from spinning, mine didn't! I had my son hold shock with upper and lower in hand while I turned the bottom center bolt. Thats it!

Edit:
Seal are out too.
« Last Edit: May 10, 2010, 11:15:40 PM by Kouros »
1974 CB750 K4 (Re-build in-progress)

Offline jaknight

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Re: Fork Seal Question on 750k4
« Reply #5 on: May 11, 2010, 12:28:08 AM »
It's Like A Woman,

Sometimes it's easy, sometimes it's impossible.

Depends upon mood.

Really, some do unscrew easily; many times they are super difficult to get out.  The
broomstick is good to have on hand and be prepared.  It wedges the bolt so that it
can be turned from the opposite end.

Sounds like you've got things made.  Just carefully tap or press the new seals in and
obviously make sure that you have the proper surface facing upwards toward the
handle bars.  Make sure the internal flange that the seal rests on is clean and smooth,
no nicks or scratches.

   ~ ~ ~ jaknight ~ ~ ~
« Last Edit: May 11, 2010, 12:31:48 AM by jaknight »
"THE PEN IS MIGHTIER THAN THE SWORD........
..........EXCEPT IN A SWORD FIGHT"
___________________________________________
"There is nothing new under the sun.........But there are many old things we do not know"
BIBLE ---> Basic Instructions Before Leaving Earth

Offline Kouros

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Re: Fork Seal Question on 750k4
« Reply #6 on: May 11, 2010, 12:40:05 AM »
Will do. Thanks Jak ;D
1974 CB750 K4 (Re-build in-progress)