Will replacing the hydraulic unit fix the problem?

Question

I have a 1994 Ford Explorer and its brakes have been working bad lately. It hits the floor most of the time when I break. I took it to the shop to see what was its problem and they said that air got in the brake fluid in the master cylinder and hydraulic unit, and wanted me to replace those two parts along with all the hoses and callipers, which would cost me over $2000 including labor. My dad told me he's going to by a used hydraulic unit or master cylinder or both (things are cheaper where he lives) and replace it for me. He didn't really specify which one he's going to buy and I don't remember telling him which one, but it's one of the two or both. If I replace one of those or both without replacing the hoses and callipers, will it fix the problem? Or is absolutely necessary to replace absolutely everything?

Answer 1

Replacing or just bleeding the air out of the hydraulic unit almost always fixed this type of problem. It can be done by using the brake pedal or a computer scanner to remove the air. Dad will fix it by replacing the hydraulic unit and bleeding the entire system. Good luck to you both.

Answer 2

where I live that would be called getting f--k-d, if you have a broken brake line the system would leak the oil out and fill the system full of air, I am not saying it is not the master cylinder, it might be but every thing should not have to be fixed. I would take it somewhere else for a second opinion, it could be a line once the system looses its fluid it will fill full of air, Try adding a few bottles of power steering fluid have a friend watch the brake lines while you sit in your vehicle and pump the brake pedal you will build a pressure in the system and it will force the oil out of the bad line if it is the line you will have to pump the brake pedal quite a few times while they watch for the leak. I think these guys are going to take you for a ride if you let them .

Good Luck

Answer 3

Don't ever go back to those clowns. All the hoses don't go bad at the same time unless someone got the wrong fluid in there. Air wouldn't do it.

You might just have a small leak or the master cylinder leaks. See what happens after your dad's done.

Answer 4

DO NOT pay those "pirate" fees !!!! The first thing that needs to be done is an inspection of the brakes themselves ( the pads in front and the shoes in the rear ) and if they are worn, then replace them. It's quite possible that all your vehicle's system needs is a replacement of the pads/shoes, along with a proper bleeding of the brake lines............any reputable shop can do that for less than $ 200............get several other estimates, along with warranties, then go with the least expensive that has a warranty

Answer 5

Three ways for air in brakes. Its leaking, have you had to add? If it boils the fluid it will do the same.And the last is by passing and pulling from the rear of the master cyl.