Post by robjamez on Apr 11, 2013 11:10:21 GMT
I recently rebuilt my rear caliper. The bike had been stood for way too long and the pistons were well and truly stuck.
As brake fluid was pumping out around the pistons I knew they weren't coming out with any type of hydraulic or air pressure.
So, after soaking in a petrol/diesel mix overnight (left over from a van tank draining exercise), I split the two halves. While I had someone hold the caliper itself, i slipped two foot lengths of 1-inch steel box section onto the handles of a pair of pliers, opened them inside the piston and out they came!
The sections of steel, which have been laying around for a long time, have also proved very useful on the end of a ratchet or socket lever for some extra force when necessary.
As brake fluid was pumping out around the pistons I knew they weren't coming out with any type of hydraulic or air pressure.
So, after soaking in a petrol/diesel mix overnight (left over from a van tank draining exercise), I split the two halves. While I had someone hold the caliper itself, i slipped two foot lengths of 1-inch steel box section onto the handles of a pair of pliers, opened them inside the piston and out they came!
The sections of steel, which have been laying around for a long time, have also proved very useful on the end of a ratchet or socket lever for some extra force when necessary.
needles to say new pistons required