Brake calipers

[sulzerman]

Hello all

 Just received a pair of recon brake calipers.  I have noticed the pistons are stepped., not as original.  Is this right?

Not seen this before.

Supplied by a very reputable supplier.

Please see picture

[johny]

Havent see that before but it does exactly the same thing as the shim that you usually fit with the pad. By putting pressure unequally the pad shouldnt vibrate and squeal and with those pistons I wouldnt have thought you now need to use shims...

[Peter Truman]

Think I’ve seen MG B pistons like why and benefits?

[Pete Lewis]

this ws common on lockheed calipers of the 70s  you dont need shims  the relief  needs to be on the 

leading edge, problem was the piston can rotate in time and the relief can be wrongly placed and then you get squeals

pete

[thescrapman]

Thank you all, you have just answered a question for me. I gave a set of recon 2000 Lockheed calipers to a mate, he gave them back saying the pistons were damaged.

Now I know who was right, and it wasn’t him!

[Pete Lewis]

it is a much better idea to give the pads a leading ,

until the piston rotates , and the lead in is upside down 

dont use grips to turn them as easy to score the seal surface 

common on Hunters and the like of the era 

Pete