Rear brake lever pivot bearing

[PW Cymru]

I've a bit of a slack pedal so to speak (Quiet at the back no tittering)

I want to fit a new bearing and stainless steel bolt.

Any tips on how to remove the bearing, cut through and drift out ?

 

[Rob Farmer]

Padsaw and lots of patience. It took me hours the last time I took one out.

The heavy flywheel bikes don't have a bush at all and run straight in the frame. My 100/7 is so bad is misses the brake switch

 

[PW Cymru]

Thanks Rob,

Patience with an airhead is a must have

 

[Shep]

I don't know that particular bush but could an expanding reamer be used to remove the old part??

 

[Rob Farmer]

Patience with an airhead is a must have

There's a patern emerging

 

[PW Cymru]

I don't know that particular bush but could an expanding reamer be used to remove the old part??

Hi Shep,

It's the one that the rear brake lever pivot from, just under the right hand rear down tube of the frame.

As Rob says its non existent on some models and get really sloppy when worn badly (cos its hanging out in the shit so to speak and is never lubricated).

Expanding reamer would do the trick nicely, especially as the bush is fairly thin walled.

However failing a reamer, looks like a small saw blade will have to make do.

I'll order the bits (Bush and stainless bolt) and let you know how I get on.

 

[John Roberts]

The accepted way to do it would be to press it out with a suitable mandrel, see sketch, it would take me five minutes to make one if you'd like. I would need to know:

1. the O/D, that is, the Outside Diameter of the bush (the same as the diameter of the hole in the brake pedal in which it fits)
   
2. the bore of the bush (the size of the hole in the bush)
   
3. the length of the bush

You could press the bush out in a vice, and you would also need a short length of tube to support the brake lever and allow the old bush to come out. A piece of conduit would do, I have loads of those. You would also be able to press the new bush in with the same mandrel.

Let me know if you're interested.

If you do decide to go ahead and saw it out (use a hacksaw not a padsaw- take the blade out of the hacksaw frame, thread it through the bush, then put it back in the saw frame and saw away) then be careful not to saw into the pedal itself, choose a point on the bore that will be under compression rather than under tension when you are braking so that you don't weaken it unduly. (I apologise if this is a case of Granny sucking eggs )

EDIT: "Mandrel" is the same as "Pin" in the sketch. Sorry.

 

[PW Cymru]

Thanks for the offer John, I'll try the blade method first as there's not a lot of material left to drift out as the bush is fairly thin walled to start with.