Floating front caliper assymetric pad wear

Fifth gen front left brake. I found the inside pad (from memory) was worn through while all the other pads show normal wear for the millage. Though of piston not retracting but found the caliper does not keep its position on the slider pin. Without wheel and then no surface for the pistons to push on, I push the caliper in and it does not stay there and always pull out. The inside pad is always dragging. It seems some air is compressed in the slider pin cylinders.

Is there a trick to assemble the caliper on the bracket without trapping air, or to purge the air? I rebuilt a few caliper in the past and never encounter this problem. Is it a known problem of this quite complex linked brake or just bad maintenance?

 

there are rubber caps that you can remove to service the pins, if yours are not there ( i had one go missing) its not a big deal, also remove any excess grease from the pins and their bores ans this traps air and can lead to your pins jambing. Your pins only need a little grease to ensure they move freely.

there is nothing different about linked brakes than regular brakes other than the additional piston on one caliper( per wheel). if you force a piston in and it comes back out then look at your resivoir, take the lid off and then push the piston back in, the trapped air in the resivoir will push the piston back out because you compressed it.

If you suspect air in your brake lines then bleed them, the process is the same and for the linked lines there is a process in the FSM.

 

Thanks for the info. I will try to remove some grease, I know there is a lot. The linked brakes just make this caliper hard to remove from the bracket. I already bled all lines.