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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 23:45 - 21 Jan 2019 Post subject: Perennial problem dismantling forks for oil seal change |
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I keep having a problem with dismantling forks to change the oil seals.
I take the bottom bolt out, remove the damper rod, dust seals out, circlip out. I heat round the seal area with a heat gun then slide-hammer the uppers and lowers apart.
About half the time, they come apart second or third knock. The other half of the time, I spend the next three hours sweating, swearing, heating, clamping in a vice, hammering then eventually destructively removing the seal and going back online to order a new set of bushes because the inner and outer have overridden one another. Usually damaging the fork lower in the process.
What am I doing wrong? Or does everyone else have this problem too?
https://lh3.googleusercontent.com/7X2VC3_XJnV1r_OCuk6h-N-QfOSzIM1at24TNQsZojBM_k-ot5tw-KCsrxapUIMk_F7GU-AtiC6SKzgW46a4mV2PmmvpL4cx9YjDb6qW76ukPNckckymdgUX0IYiDsXmiV8l_uS7sQ=w1164-h873-no ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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Riejufixing |
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Riejufixing World Chat Champion
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Kawasaki Jimbo |
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Kawasaki Jimbo World Chat Champion
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Riejufixing |
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Riejufixing World Chat Champion
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Robby |
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Robby Dirty Old Man
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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MarJay |
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MarJay But it's British!
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Islander |
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Islander World Chat Champion
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Meatybeaty |
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Meatybeaty World Chat Champion
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Posted: 12:45 - 22 Jan 2019 Post subject: |
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bikenut |
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bikenut World Chat Champion
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stinkwheel |
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stinkwheel Bovine Proctologist
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Meatybeaty |
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Meatybeaty World Chat Champion
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DrSnoosnoo |
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DrSnoosnoo World Chat Champion
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G |
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G The Voice of Reason
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Riejufixing |
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Riejufixing World Chat Champion
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Pigeon |
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Pigeon World Chat Champion
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Kentol750 |
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Kentol750 World Chat Champion
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Riejufixing |
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Riejufixing World Chat Champion
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bikenut |
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bikenut World Chat Champion
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chris-red |
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chris-red Have you considered a TDM?
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sickpup |
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sickpup Old Timer
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 16:42 - 23 Jan 2019 Post subject: Re: forks |
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bikenut wrote: | Hi stinkwheel, thanks for posting the exploded view......
If the drain plug part number 20 ( yes it also has an other function as well ) was removed whilst the fork stanchion was still in the bike, and the circlip part number 12 and its associated upper "seal" removed then the lower fork leg could be removed via its own effective "slide hammer" and weight, once the mudguard etc is off ??
The other parts could then be removed for bench working? |
That's how you do it on an old Brit bike with fork shrouds but in this instance, it would probably have been a really good way of knocking the bike over. The old brits often don't have bushings (like my bullet has no bushes but two oil seals per leg spaced about an inch apart)
The problem is with that "Slide hammer" action, it doesn't always deliver. In my experience, about half the time the fork comes apart, the other half of the time the bushings start overiding one another and you're in it for the long-haul. Even with the fork on the bench and the lower clamped in a padded vice. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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sickpup |
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sickpup Old Timer
Joined: 21 Apr 2004 Karma :
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 22:44 - 23 Jan 2019 Post subject: |
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Well, in this case, the fluid that came out was clear and colourless. So it was either changed just before it was parked up 13 years ago or it's in hell of a good nick. I'm sure nobody has had the fork tops off recently.
Anyway, as predicted, the second one came out with minimal fuss . So my 50:50 record is intact. I did heat them in the end, they didn't look like they were going to move cold, took three bashes after warming up. Although perhaps soaking them in ATF/Acetone mix loosened things up (it certainly loosened the paint I got a drip on!).
Got the new bushes and seals ready to fit and a bottle of multigrade fork oil but I'm going to give the sliders a coat of polyurethane laquer before I refit them to prevent stone chips. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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Old Thread Alert!
The last post was made 5 years, 91 days ago. Instead of replying here, would creating a new thread be more useful? |
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