X eng X brake concern

[Gazzar]

I'm fitting an X brake at the moment, and I can't quite convince myself it's right.

The problem is getting the tension on the lever so that it doesn't rattle and rub.

If it's right enough not to rattle, it's rubbing, not much, but enough.

And I've this so loose that it's just barely under tension.

I think the issue is the floating pad doesn't fully back off against the back plate, there's a gap between the pad and the plate, that if it wasn't there, there'd be clearance for everything. 

The spring isn't able to expand enough to achieve this.

It's as if the lever prevents the pad and the back plate from closing up.

 

Are they supposed to rub?

[Gazzar]

I got industrial on this.

I've ground the back of the pivot lever back a couple of mm.

It now fits very nicely. Slight tension, pads clear, no rattle.

Much happier.

 

I'm not impressed by this kit, to be honest. It's okay, and the core mechanism is fine, but the disk could have been tighter on the flange, and the connection to the hand brake handle is decidedly unimpressive.

An extra £5 of cost and it would have been superb.

[Anderzander]

I can’t quite figure it out - it’s very different to the setup I had on my 90 with the JCB calliper 

[Bowie69]

It's a series set up, I believe.

[Gazzar]

The lever pivots in its bracket and forces the front pad against the disk.

The lever bracket and front pad slide on tubes that are held loosely by the gearbox mounting.

So as the front pad goes back to the disk, the tubes slide on the mounting,  pulling the rear pad forward.

Clever stuff, but the manufacture could be better, I believe.