Birdie's Return To Life

it usually doesnt take a whole lot of force...I use a large pair of pliers to compress the pistons on my Jeep Grand Cherokee...I have to assume yours are smaller. Im not familiar with the Citroen at all
 
Its possible thats it is seized?

My usual solution to car repair complications is to wack the offending part with a hammer. Thats why I dont do it very much. haha

In this case that might help, preceeded by a liberal dose of penetrating oil. There's a vague memory too about using the old break pad to bridge the O on the piston making it easier to use the C clamp.
 
Birdie Im wondering how your daughters are doing. All good there?
They started school a week ago.
According to them, they love it there.
I can see they do, because they look happy and secure :)
 
There's two types of pistons Birdie. Some you have to use a special adapter that turns the piston down. If you try and compress it without turning you will damage it. Just make sure yours is not that type.
If it is, needlenose pliers opened up and placed between the 'fins' of the piston will allow to to turn it clockwise to retract back into the housing.
As mentioned, remove the brake reservoir cap. Compress the piston slowly. Prybars or big screwdrivers work if you use them as levers pushing down on the piston. Careful not to pinch or damage the rubber boot. Add grease to those caliper pins once you have them out as well.
I think I had a volvo that needed a tool to twist it back in. I used something on hand. Otherwise the c clamp or channel lock pliers.
 
I think I had a volvo that needed a tool to twist it back in. I used something on hand. Otherwise the c clamp or channel lock pliers.
That was my first thought.. But can't find the size needed. Not deep enough or wide.
So, I went for a c clamp as a second idea
 
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