Brake Calliper

Brake Calliper

The brake calliper:

The brake callipers would have to be one of the vehicles most important components out of all the brake components.

These are fitted over the brake rotor like a clamp & push against the pads to slow the vehicle down.

There are two types of callipers - Floating & fixed.

Floating Callipers:

These are when the pads secured to the body of the calliper between the piston & the rotor, The side between the body & the rotor.

Fixed Callipers:

These have two or more pistons on either side of the housing & are crossed drilled to allow the fluid to flow to all pistons evenly.

Off car vehicle testing:
Dissembling the calliper & testing all components.
(Left & below) is of the piston which pushes against the pad, the fluid pressure builds from behind.

We are looking for anything that could possibly cause the fluid to leak out from behind out on to the pads or loosing pressure.

Deep scratches
Broken/ chips from the end

Using the vernier calliper we then measure the  inside of the calliper to make sure that inside hasn't been worn from the piston moving back & forth. 

The same is done with the piston as it was with the calliper. We need to check specs to make sure it pass's.

Once all seals, calliper, piston are all checked & everything is fine.
Our one was not & needed a new piston & a couple of seal