Sable 2000 front calipers hanging up

2000 Mercury Sable . Front calipers hanging up. 84K mi. Vehicle has
rear drums/front discs.

So far, have installed loaded calipers....bled system....pedal is
OK....still hanging up. To see if hoses have internal deterioration
impeding back flow, plan to crack hoses at caliper and compress
caliper pistons, to see if I get reverse flow up to master cylinder.
At this point, if it turns out that the hoses are not the problem, not
sure which way to turn.

Question comes to mind - isn't it kind of strange for both sides to
hang up at the same time? Makes me wonder about other
possibilities...is master cylinder a candidate....what about an ABS
related problem...and what about a proportioning valve? If so - what
are best ways to diagnose? Thanks.

panisman RemoveThis @erols.com wrote:
> 2000 Mercury Sable . Front calipers hanging up. 84K mi. Vehicle has
> rear drums/front discs.
>
> So far, have installed loaded calipers....bled system....pedal is
> OK....still hanging up. To see if hoses have internal deterioration
> impeding back flow, plan to crack hoses at caliper and compress
> caliper pistons, to see if I get reverse flow up to master cylinder.
> At this point, if it turns out that the hoses are not the problem, not
> sure which way to turn.
>
> Question comes to mind - isn't it kind of strange for both sides to
> hang up at the same time? Makes me wonder about other
> possibilities...is master cylinder a candidate....what about an ABS
> related problem...and what about a proportioning valve? If so - what
> are best ways to diagnose? Thanks.

are you sure the caliper pins are not rusted or pitted and have some
lube on them?

What does hanging up really mean?

Bob