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V50/3 fork removal

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Planter View Drop Down
Falcone
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    Posted: 30 Jan 2019 at 17:55
Puzzled by how to remove the front forks on the V50/3.

The cap nut at the top of the fork does not seem to drop through the yoke hole. Does this mean to take the fork off it is necessary to dissemble the fork in situ by removing the lower bolt that fixes the cartridge to the lower fork leg so that the cartridge can be removed upwards?


Or should something else be done?


Cheers
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iansoady View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2019 at 14:31
No, I think it should go through. I take it you've removed the mudguard and are trying to remove one leg at a time? You have slackened the pinch bolts of course.....

Sometimes stanchions can be rusted in place, and occasionally you need to use a small wedge carefully in the yoke slot to give a bit more clearance.
Ian
1952 Norton ES2
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Planter Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2019 at 16:55
Yes, the entire front end is stripped down.

I reversed the pinch bolts to push the yoke holes open. The stanchion is moving and turning freely.

Will give it another go.

Cheers
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Post Options Post Options   Thanks (0) Thanks(0)   Quote c13pep Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2019 at 18:08
Originally posted by iansoady iansoady wrote:

No, I think it should go through. I take it you've removed the mudguard and are trying to remove one leg at a time? You have slackened the pinch bolts of course.....

Sometimes stanchions can be rusted in place, and occasionally you need to use a small wedge carefully in the yoke slot to give a bit more clearance.




Exactly as Ian says whether they`re oil/pneumatic or hydraulic

CHRIS
you can`t have any fun in a straight line

Monza
Honda CB77 project

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Planter Quote  Post ReplyReply Direct Link To This Post Posted: 03 Feb 2019 at 16:03
Thanks guys, got the forks off.
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iansoady View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 04 Feb 2019 at 10:25
What was stopping it?
Ian
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1958-ish Greeves/Triumph in progress
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Planter Quote  Post ReplyReply Direct Link To This Post Posted: 04 Feb 2019 at 14:12
The cap nuts had been rounded in past time which gave a couple of high spots and meant they did not pass through the yokes. I stripped the forks down in situ and the stanchions then dropped through quite happily.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 06 Feb 2019 at 16:50
Good news.
Ian
1952 Norton ES2
1986 Honda XBR500
1958-ish Greeves/Triumph in progress
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Post Options Post Options   Thanks (0) Thanks(0)   Quote waynedear Quote  Post ReplyReply Direct Link To This Post Posted: 24 Mar 2019 at 13:45
Did mine yesterday, once the wheel and associated gubbins were removed and the clamps slackened they slid straight out.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Planter Quote  Post ReplyReply Direct Link To This Post Posted: 26 Mar 2019 at 17:27
Wish mine worked like that!

One side effect of having to strip the forks apart in situ is that the top of the damper cartridge can be loosened and removed. This gives access to the fork oil in the damper, so leads to possibilities of firming up the fork action if desired.


However, next question is what this oil is? This oil is not mentioned in the workshop handbook.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Planter Quote  Post ReplyReply Direct Link To This Post Posted: 26 Mar 2019 at 17:40
Some pictures to illustrate:

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Planter Quote  Post ReplyReply Direct Link To This Post Posted: 02 May 2019 at 16:40
Bike back on the road.

- Replaced the cartridge fork oil with approx 120-150ml of 7.5 fork oil per fork; old cartridge fork oil was pretty grotty. Filled the cartridge up to the same level as the old oil.
- Used 70ml of DX3 ATF for the fork oil - slow fill process using a syringe and driblling the oil down the outside of the cartridge.
- Pressurised the fork to 40psi with a bike pump. This process on my bike pressurises the whole of the fork and not solely the cartridge.

Forks seem to work well on the road; front end is tight.

Lessons learnt,which seem to specific to my bike:
1) Have to dismantle the fork in situ as the fork cap will not easily go through the yokes.
2) Cartridge oil can be change/replaced by unscrewing the fork cap from the cartridge - this procedure is not mentioned in the handbook.

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