Well here is the deal, if you have been following along I had a problem of the wheel would make a hard turn when let go of the steering wheel. Turned out the tire pressure was very low. Fixed, however today it started when I would press on the brakes it would lean to the right at first it did it hard then I got lucky and read an aritcle here where someone lubed the pins the calipers ride on and well I tried that it helped a little but it still does it, I did not jack it up and rotate tires while someone pushed brake I will in the morning. Is this next question possible? As I haven't a clue. Would it be worth a shot of taking the calipers off the rotor and take brake pads off and push the brake allowing the piston to come out and then put some antiseize or bearing grease on the pistons? When I did the brakes the piston came out just enough to where I couldn't get them on and could not depress with hands, on other vehicles i have done, the caliper would come out a fair distance and I could depress them by hand unless they are the gm ones where you more or less screw them back in. So do you fellows think it would be a good idea to try and lube the piston ? Does it even come out enough to try? As I mentioned when I changed the pads the calipers pistons moved very little, is this normal for ford trucks? (1995 2wd) If I get no advice I am gonna replace both calipers tomorrow so if anyone thinks I should give the lube a shot let me know

 

The caliper piston should move all the way back into the caliper with gentle force. I use a large c-clamp and gently turn it down to bottom the piston. Under no condition should the piston be lubricated, it is surrounded by brake fluid at all times. The only dry part is what is visible when the pads are worn.
The piston sounds like it is sticking or stuck in place.
Just a note on seating the pistons on a vehicle with ABS- open the bleeder screw so the fluid is pushed out of the caliper or wheel cyl. instead of back into the master cylinder. That way any contaminates won't be forced thru the ABS pump, solenoids,etc. from the wheels. Then refill the MC with new clean brake fluid.

 

Thats what I figured I just didn't know if maybe some lube might help break the piston loose as a temporary fix. Nothing gentle about these pistons they were very stiff. Like I mentioned I have done brakes before but this is the first time for the ford truck and well it was different than the others as far as how the caliper piston felt closing. Oh well appreciate the response