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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: foliver on January 29, 2022, 08:35:35 AM

Title: Forks removal and seal replacement
Post by: foliver on January 29, 2022, 08:35:35 AM

Hi!
I’m thinking in doing the fork seals replacement myself or not
I don’t know if it’s easier than I think or not.
I read what I could, I saw the available vids about the K’s, but I don’t know.
Is a really hard work and are the forks difficult to disassemble?

What’s your experience?

I’ve a K75C

Txs again!!

Title: Re: Forks removal and seal replacement
Post by: beemuker on January 29, 2022, 09:23:18 AM

 I recently did it on a k1100lt. The procedure is similar for the 75C, with no tupperware to remove. It isn't too difficult. The biggest issue I had was getting a rusted retaining clip out. A manual and a good youtube vid should get you through it. 

Title: Re: Forks removal and seal replacement
Post by: foliver on January 29, 2022, 10:04:16 AM

Thanks beemuker.
Any tip on the Allen bolt on le lower part of the shock.
I read that a good fast moment, not a progressive one to unbolt is better..
You unbolt it without problems?

Title: Re: Forks removal and seal replacement
Post by: Laitch on January 29, 2022, 10:13:30 AM

There isn't anything special about the basic disassembly of front fork tubes. As with all possibly seized fasteners, the heat-penetrating oil-espresso-attack method is the modus operandi of choice.  Photograph the interior parts in position before further disassembly, if necessary. Compare them with diagrams from a BMW parts fiche or manual. This video will work well enough to get inside then reassemble.https://www.youtube.com/watch?v=vrmYJgcGX30 (https://www.youtube.com/watch?v=vrmYJgcGX30)

Title: Re: Forks removal and seal replacement
Post by: beemuker on January 29, 2022, 11:12:26 AM

Quote from: foliver on January 29, 2022, 10:04:16 AM

Thanks beemuker.
Any tip on the Allen bolt on le lower part of the shock.
I read that a good fast moment, not a progressive one to unbolt is better..
You unbolt it without problems?

yes, no problem with allen bolt, I may have used an impact wrench.

Title: Re: Forks removal and seal replacement
Post by: The Mighty Gryphon on January 29, 2022, 11:46:28 AM

Heat!  Turn the legs upside down and soak with penetrating oil.  Then lots of heat.  Mine had red Loctite on them and that stuff needs to be hot to let go.

The rest of the job isn't too bad.  Just keep all the parts in order.

Title: Re: Forks removal and seal replacement
Post by: Past-my-Prime on January 29, 2022, 01:07:30 PM

My friend, if I can do it, any half-assed mechanic can do it. I'm probably closer to 1/4 assed.

I took my time, took lots of breaks, took photos, and put it back together afterwards, carefully following directions regarding installation of the forks loosely at first, then the wheel, the bouncing, then tightening so that everything was ultimately in alignment. And used a torque wrench to get everything right.

Title: Re: Forks removal and seal replacement
Post by: foliver on January 30, 2022, 08:28:50 AM

thanks all foy your replies

Nice video Laitch, it feels manageable
"My friend, if I can do it, any half-assed mechanic can do it. I'm probably closer to 1/4 assed.", jajaj, you made me laugh
ok you give confidence, that's good!

Today i'm with the front master cylinder, after that: Forks!