my 2001 toyota avensis has just gone through another set of pads on the osr.the piston would not push back in, so after removal i found that it screws onto a central thread,it seems to 'unscrew' as it is pumped out but there seems to be no way of it returning or going back in when released.the caliper also works the handbrake [no seperate shoes] but seems to work fine.any tips would be appriciated.thanks.

ant427, August 2012

yes it does have a spring but i suspect a rebuild is on the way then. thanks steve.ant

ant427, August 2012

rear caliper with handbrake built in always have the wind back piston.piston doesn't move back very far.Has it got a return spring on the handbrake mechanism.could need a new complete caliper to sort 100%

Steve, August 2012