Allen wrench for rear pistons?

[ricematthews]

I believe it is a 12 mm Allen (at least on the 4000Q).  The design is a bit
of a pain.  When I did mine, I couldn't find an Allen wrench that big - it's
not like I scoured the earth, but there wasn't one at Pep Boys, so I
scrounged a 12mm bolt and a couple of nuts, put the nuts on the bolt,
locking them together, then put the bolt head into the 12 mm hex hole on the
caliper and turned it with a ratchet.  Turn clockwise while pushing in -
that sounds right.


>    I totally forgot about having to turn the pistons in vs. pressing them
>in on rear calipers.  I am doing a rotor/pad job all around on my sister's
>5ks while she is off from work.  I hoped it would be a 10mm allen but it
>ain't.  That is the largest I have so I tried a 13mm headed bolt, no go.
So
>I assume a 12mm allen is the ticket, turn clockwise while pushing in,
right?
>
>TIA,
>
>Alexander van Gerbig -- '88 80