Rear caliper not winding back far enough

[loggyboy]

Can anyone shed any light on why this might be. Piston winds in and out nicely, but when trying to slide the pads in I need a little more space.
I searched and saw mention of spacers missing on discs for Cup models, but mine is a standard 172.
The previous set of pads fell out due to a failure of the retaining clips, this mean the piston had been pushed all they way out, would this have caused any issues? I assume not as it easily moves in and out of the caliper.

Thanks in advance.

 

[rich-6]

Push the sliders over to give yourself more room

 

[dmallett]

I had this, just push it over and quickly put the bolt in. Took me ages to figure it out

 

[loggyboy]

The slider makes no difference as it moves with the caliper?
And what bolts? theres no bolts on the rear calipers that need to be removed when doing pads?

The other side went in fine and I did nothing different.

 

[jenic]

Edit: if you have done one side then ignore me