So after cracking the shits with this (I feel you pain Marty) I thought I'd pull the calipers apart to see if they needed pistons
Yep, no worries, compressed air, pop the pistons out?
Not
This car has been idle for 16ish years?
The residual brake fluid had turned into crud, clag, varnish, poo...……….call it what you like but the pistons wouldn't be moved.
I even tried pushing them back in and soaking them in brake clean.
So.…………...The RoDoMotive (I don't throw anything out) Caliper piston wedge-o-matic piston puller was developed.
First I tried a slide puller, shaped washer which was cocked in the piston bore.
This was working but it destroyed the thread on the end of the puller...…………
Proto-type II was successful!
It was a wedge, basically, that gripped the inside of the piston which enabled it to be pulled out.
The sleeve that fitted inside the piston was an inner wheel bearing that I had removed. You'll see the crack.
The top and bottom washers are Holden rear upper shocker mound washers ground to the task.
The washers spread the bearing and grip the inside of the piston.
The bolt is 3/8 UNF with ample pulling power.
The spacer is made from an old tail shaft.
Edited by rodomo, 12 June 2020 - 11:02 PM.