The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Frame => Topic started by: coater87 on 26.07. 2019 19:57

Title: Fwh rear sideplay
Post by: coater87 on 26.07. 2019 19:57: https://youtu.be/PldJEPxh2pQ

Cleaned the bike today and found this after 600 miles.

Thinking back, i used all the correct bearings, except i ordered shielded on both sides- i am not aware of it if that makes a difference.

I omitted one dust shield when i built up the wheel.

I dont know if the sprocket or the axle may have been made wrong.

Everything is bottomed out tight, but i still have .070 free play.

Anyone else ever have this?

Lee
Title: Re: Fwh rear sideplay
Post by: chaterlea25 on 27.07. 2019 00:04: Hi Lee,
The right hand wheel bearing retainer will have loosened off
They are drilled from one peg hole through the hub for a small split pin (cotter pin in USA)
The pin hole often gets blocked when the hub is repainted
If a new retainer was fitted then a new hole needs drilling

John
Title: Re: Fwh rear sideplay
Post by: coater87 on 27.07. 2019 00:26: Hi John,

Are you saying i need to back this bearing retainer out .070 to take up that slack?

I know for sure i do not have a cotter pin anywhere in the rear hub. Does anyone have a picture of where this pin goes?

Lee
Title: Re: Fwh rear sideplay
Post by: duTch on 27.07. 2019 00:30: Quote
Are you saying i need to back this bearing retainer out .070 to take up that slack?......

Lee, the way I read Johns comment is that the retainer has loosened itself off and needs to screwed back in

Quote
The right hand wheel bearing retainer will have loosened off.......
Title: Re: Fwh rear sideplay
Post by: chaterlea25 on 27.07. 2019 01:37: Hi Lee
Quote
Lee, the way I read Johns comment is that the retainer has loosened itself off and needs to screwed back in

Yes that was what I meant
Check each of the peg spanner holes for a radial drilling outwards through the threads
look inside the hub threads for signs of the drilling out through the threads
It can be hard to find

I had the same problem early in my A10 ownership and have seen it happen on other A10's
Loctite doesn't seem to work or didn't for me *sad2*

John
Title: Re: Fwh rear sideplay
Post by: coater87 on 27.07. 2019 02:14: Ok John,

Tomorrow i will dig into this, i am positive i did not install a cotter so i guess that retainer could be rattling around in there.

Thank you and i will report back.

Lee
Title: Re: Fwh rear sideplay
Post by: JulianS on 27.07. 2019 09:26: I have not seen drillings for cotter in a full width iron hub, but they are a feature in the Ariel type hubs.
Title: Re: Fwh rear sideplay
Post by: coater87 on 27.07. 2019 14:37: John,

You were exactly right, the retainer had back itself off.
I could see no drilling in the hub or any pegs hole, so i prepped it and tried lock tite blue and seated it down tight.
If it backs off again i will drill and pin.

Your a BSA genius Sir, and thanks again! *smile*

Lee
Title: Re: Fwh rear sideplay
Post by: RichardL on 27.07. 2019 14:50: Having trouble seeing how the retainer spinning out causes a gap rather than a tighter fit.

Richard L
Title: Re: Fwh rear sideplay
Post by: berger on 27.07. 2019 15:47: RichardL I think because its the right hand retainer that has backed off probably allowing that bearing to move outwards towards the retainer, I am sure there is a better way of explaining this but I have got thick mode on today *whistle*--- I went to the pub *beer*
Title: Re: Fwh rear sideplay
Post by: coater87 on 27.07. 2019 16:31: Quote from: RichardL on 27.07. 2019 14:50
Having trouble seeing how the retainer spinning out causes a gap rather than a tighter fit.

Richard L

Dont feel bad, i had the same problem.

Where i showed the movement on the video, i now have a permanent gap but everything is tight and there is no free play.

I imagine if i made a spacer to go between the hub and the bearing i can get rid of that gap too.

Next time i am in there i will clear all that up.

Lee
Title: Re: Fwh rear sideplay
Post by: morris on 28.07. 2019 12:37: Quote from: coater87 on 27.07. 2019 16:31
I imagine if i made a spacer to go between the hub and the bearing i can get rid of that gap too.

I think I did something similar on my SA's 7" hub.
If my memory serves me right I made up a spacer over the stub axle to take up the play.
Don't remember either if I put it before or after the chainwheel bearing.
Should learn to take notes really... *dunno2*
Title: Re: Fwh rear sideplay
Post by: JulianS on 28.07. 2019 15:04: I wonder if a spacer is missing here?

Have been removing and refitted the iron hub rear wheel for over 40 years and never come across this issue before.

The sculpted spacer which sits behind the hub bearing is about 0.1 inch thick and moves the hub/sprocket to the chain side?
Title: Re: Fwh rear sideplay
Post by: RichardL on 28.07. 2019 16:10: Quote from: JulianS on 28.07. 2019 15:04
I wonder if a spacer is missing here?

The sculpted spacer which sits behind the hub bearing is about 0.1 inch thick and moves the hub/sprocket to the chain side?

No trouble understanding this as a possible reason fo the wheel float

Richard L.
Title: Re: Fwh rear sideplay
Post by: coater87 on 29.07. 2019 12:14: Thanks Julian,

I have the sculpted washer in wrong.

Lee

Lee
Title: Re: Fwh rear sideplay
Post by: RichardL on 29.07. 2019 13:13: I, too, will be watching for the answer to your question. Sometime in the (hopefully) near future my A7 rear hub will need to go together.

Richard L.
Title: Re: Fwh rear sideplay
Post by: Jules on 04.08. 2019 03:10: interesting observation Julian, is that washer supposed to create a "spring load" or something?? I'm just intrigued why its that specific shape (as opposed to "just" a spacer.....?? cheers