Hey,
My 1999 F250 Ext Cab, 8' bed truck (7.3 dsl) has been giving me headaches in the brake department. I'm having an issue with the brakes sticking or hanging. When the problem comes up you can physically feel the truck being held back and the brake petal itself gets fairly hard to press. Also, when it releases you can hear a distinct pop and immediately feel that the brakes have freed up. I have changed calipers (twice actually), changed the front flex lines, as well as flushed the fluid. After every fix the problem seems to improve, but is still there. I'm not sure how to test the master cylinder and the booster, but suspect those are possibilities as I have not changed those items. The problem doesn't always happen which makes it a bit difficult to track down, so I figured I would see if I could get some direction from you guys. Now the second difficult part... My father will have to be looking into any of the recommendations you guys make on weekends as I'm working across country and hoping to get this solved before I go home to drive the truck back!!! Thanks for any feedback or recommendations.

 

I know I'm not answering your question which isn't of much help to you, but I'm having the same problem with my 99 F250 SD V10. Read brakes are hanging to the point the discs are starting to glow, sometimes they'll release sometimes they wont, I've tried everything from new rotors, to new callipers to new brake pads. Nothing seems to work, the rubber flex line doesn't appear to be collapsing on it self.

 

I'm thinking slide pins. Have a look at this. Welcome to guzzle's Front Caliper Slide Pin Upgrade Web. Might not be the problem, but I didn't see where the slide pins have been greased in your post.

Good luck.

 

Slide pins are greased and free. (calipers came with the entire unit, and new slide pins) Thanks for the thought though! Any other ideas?

 

I had mine all apart this morning, I found that the cups were full of dirt (even though they are only a couple weeks old) cleaned the cups out, sprayed some WD40 in worked the breaks a bit and they were still hanging up a little. I then took the caliper and slide pins all apart, cleaned everything up real well and greased everything up and they seem to be work fine now. I did have to replace one hose that was sucking the inner lining together when you let off the break which wasn't releasing the pressure off the calipers as well.

 

Did you replace both calipers and pads? I found today that the pads they gave me at outside were for a E250 which are different then the F250 and won't slide like their suppose to. Mine slid in and then after that they were to tight to slide back out far enough unless you get on the brakes real hard and then back on it again to pop them loose.

 

Fire,
I have replaced the pads, but this was some time ago. Might have to try a new set I guess. Also, how did you check the hose to see that it was sucking the inner lining in on it self?

Any other ideas are more than welcome. Is there a way to test the booster and the master cylinder?

 

i just had same problems replaced everything before master cylinder nothing worked until i replaced the master cylinder!

 

Good to know. I will probably go ahead and do the master cylinder, but does anyone know of a way to test it before hand. After changing everything else that made sense it would be nice to know I'm fixing it this time without blindly changing more parts!

 

To check whether the hanging is mechanical (pins, pads, etc) or hydraulic (Master cylinder), get the brakes to hang up and then open a bleeder screw. If the brakes release, you've found the problem to be hydraulic.

At that point, it's either the lines (you already replaced) or the master cylinder.

 

I will try it. The biggest issue with this is the problem isn't exactly consistent so it can be difficult for it to repeat the issue at times. Will see if I can get my dad to drive it a bit though, but he usually uses his work truck so might just end up having him change the master...

Thanks guys