Tyres

Actually the average G-clamp is designed *not* to rotate on the 'work-piece', so the only force most G-clamps will apply is a pushing force and not the (in this case) rotational force required to wind the 'outer' piston back in.

Exactly.

Not at all, but even if we were, we can still do the most important thing - understand who something works and thus the problem - unlike you Conor...

I've always found that they 'stick' a bit and will rotate.

Mind you, in this case, you're relying on the rotation of the clamp to wind the piston back in.

So, if it doesn't rotate, you're going to damage the threat / ratchet on the caliper, and if it does rotate, you'll be grinding away the face of the piston.

Gentlemen,

As the instigator of this thread I am disappointed that you have to have a slanging match that borders on total ignorance from the both of you, please do us all the favour of either going somewhere else to carry out your petty arguments or just shut up.

Martin P

The cone shaped part on the end of the clamp didn't rotate..

I have an extremely high mechanical aptitude.

So how do calipers that need to be wound back work then? Please explain to this qualified mechanic with main dealer experience.

"campingstoveman" gurgled happily, sounding much like they were saying:

NAHAY?

On the P6, the piston you see isn't a hydraulic piston. It is mechanically linked to the internal hydraulic piston via a self adjusting mechanism also operated by the handbrake.

Just a thought, but you do realise we're talking about the _rear_ brakes, don't you?

In *your* opinion of course, just like most out-and-out bodgers do...

I already have, read the thread!

Wooo!

'cos main dealer mechanics are all highly trained professionals and not in any way bodging grease monkeys.....

...and who said anything about main dealers, I've never worked in a main dealer workshop in my life - as will be the case with most mechanics, it's nothing to do with were one works but the ability to (sometimes stop to) understand how something works, and thus understand the problem, and thus understand how to fix/work-around it and not just use brute force and gross ignorance - especially when it's someone else's property!

According to all the aptitude tests I've ever done and the qualifications I have...

I was qualified when it actually meant a toss and before the ability to plug in a computer to tell you what was wrong was introduced.

Oh yes, those "Put the square block into the square hole and the circular block into the circular hole" aptitude tests whilst the NVQs just check that you can do nuts and bolts up, no understanding as to how things work...

So how come you don't understand how these callipers work then, tell us what the set text-book was for C&G levels 1 to 4 then, or have you hit your head and forgotten all you would have learnt back then?...

I'm waiting for you to tell me. After all, you're the one claiming I don't know so educate me.

tell

There's no such thing as level 4 CGLI 383 and there was no set text book either.

Thanks for proving you never sat it.