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Re: Replacing Renault trafic brakes o5
That perished Rubber.
Remove it completely.
Get a torch inside as much of the bore as you can and see if any sign of rust.
Give it a good squirt of WD and get any gunge out you can
Carefully extend the piston.
This can be done by clamping with a G Clamp and slowly winding open as someone pushes on the brake pedal...clamp the second piston hard.
Don't let the piston escape, you just want to get enough of it out to get an idea if there is dirt which is cleanable or rust/damage that isn't.
If cleanable...WD40, toothbrush whatever, get the dirt out, re-grease, preferably with silicon or high temp grease. New rubber and you're away.
If rusty, best think on a new caliper
Nice piccies BTW, good for anyone not too sure
Currently in Dancingdad's garage:
Qashqai 1.6 spark driven, Kia Sedona 2.9 TDI, Scenic II 15DCi 2004 (SORN) not quite RIP.