Cobbles and calipers

[Athame57]

I often ride on cobbled streets through having a GF in darkest Wapping. A few days ago I noticed the rattle from up front was more profound than ever and after sniffing about a bit I discover the plastic disc cover that sits behind the front brake calipers was loose, so I finger tightened until I got home and then fitted the shiny new stud & nut waiting for it anyway. Next trip on cobbles, ( & potholes ) was quieter but still rattley as ever, it appears to be the brake calipers as I seem to have eliminated everything else. Is this normal or am I missing something?

[Bryanj]

Fairly common when aged, you can put an O ring top and bottom of the swinging bracket on the pivot pin, not sure if they were there from new

[Athame57]

Fairly common when aged, you can put an O ring top and bottom of the swinging bracket on the pivot pin, not sure if they were there from new

Yes, they are meant to be there and I have mine in place, I recently serviced the thing, that's why it looks so shiny! 

[Bryanj]

Only other thing i can think of is excess play between pin and bracket, would be unusual ask they are normaly siezed!

[Athame57]

Only other thing i can think of is excess play between pin and bracket, would be unusual ask they are normaly siezed!

I'll check, but I doubt it. After all mine was actually siezed up just like you said. I think I did a thread on it even, a very nice polish mechanic heat treated the caliper in order to unsieze it for me, all for free!     

[exvalvesetdabbler]

Grab hold of the caliper and see if it moves up and down with a clunk.  Usually due to a bit of wear in the pin or the hole in the arm becoming oval. I hear mine when a pot hole sneaks up on me.

Next time you go over the same bumps just ride the front brake a little that should take up the slack and the noise should go away.

Also the fixed pad does rattle around a bit.

Regards
Dave

[exvalvesetdabbler]

Sunday roast any good at that pup George?

Also sent you a PM

Regards
Dave

[Athame57]

Also the fixed pad does rattle around a bit.

Food for thought Dave, I think I'll make sure I don't have excessive clearance between it and disc.

[Athame57]

BTW.. thanks for the video you messaged me! 

[DomP]

Bit of a hijack but is it normal for the disk to deflect slightly when applying the front brake?  Regardless of adjustment of the arm I notice a slight flex

[TrickyMicky]

Nice photo, can you still sit on the verandah by the river.  Apparently years ago, it was common practice to have sheep stealers, rustlers etc.  taken to the South bank, strapped to a jetty at low tide, then you sat having your ale at the Prospect and watched the tide come in.  Talking of bad guys, I realise that you were close, but, PLEASE don't leave your bike with the keys in the ignition, it could be gone in a flash.

[Bryanj]

No its not normal for the disc to flex, usually means the pivot is siezed

[Athame57]

Bit of a hijack but is it normal for the disk to deflect slightly when applying the front brake?  Regardless of adjustment of the arm I notice a slight flex

Like Bryan just said. I once had an issue with strange noises that couldn't be ignored when turning th bike at walking speed, it turned out to be a siezed caliper.
I gather all discs have a very, very gentle warp built in to brush  the piston side pad away a bit prevent over heating, but I'm open to correction...... 

[Athame57]

Nice photo, can you still sit on the verandah by the river.  Apparently years ago, it was common practice to have sheep stealers, rustlers etc.  taken to the South bank, strapped to a jetty at low tide, then you sat having your ale at the Prospect and watched the tide come in.  Talking of bad guys, I realise that you were close, but, PLEASE don't leave your bike with the keys in the ignition, it could be gone in a flash.

Yes, you can still sit on the verandah. I would love to strap some of my damn neighbours out for the tide  . Just for you, the rest of the photo!