Caliper sticking with new pads

[Moley]

Just fitted a new set of DS2500 pads and have a problem.

With the new pads fitted (Shims removed etc), and caliper put back together the disc turns fine.

However, once I press the brake pedal the caliper won't release properly and I can't turn the disc.

If I use grips and push the piston back if frees up.

I have tried a replacement caliper and it does the same. Put the old pads back in and everything is ok.

Any suggestions?

 

[MRBILLYUK]

Are your pads moving freely ? I've always found , with any pads I've used over the years I need to file a tiny bit off each corner of the backing plate of the pad so it doesn't bind in the carrier . I've never had a problem after I file it down and I always use the shims.

 

[imprezaworks]

Think you do have to file these down.

 

[Moley]

Filed down and shims removed, they move freely.

 

[MRBILLYUK]

I crack the bleed nipple and push the piston back into the caliper with my thumbs ( I have BIG thumbs lol) so I know mines not rusted inside if I can use my thumbs. Maybe your piston is rusty inside and sticking ? Also worth taking the slider pins out , clean them up and grease them.

 

[Tommo.]

Remove the shims (if you haven't already) and file the tabs at each side of the pads to allow a small amount of vertical movement once in the carrier.

 

[Moley]

Bleeding the brakes (twice) ended up clearing the problem.

 

[G Hut]

Remove the shims (if you haven't already) and file the tabs at each side of the pads to allow a small amount of vertical movement once in the carrier.

Great instructions, just fitted some ds2500 on my ph1 172 and no issue or binding following the above
Thanks