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Re: Brakes on 2000 Mercury Moutaineer wont stay
There Has To Be Air Getting In The Line Somewhere Keep Depressing it And Adding Brake Fluid. Make Sure That When You Bleed The Brakes You Have 2 People 1 Pushing The Brake 1,2,3 Hold And The Other Is By The Bleed Off. Heres The Job For The Second Person They Should Have A Clear Jar Half Full With Brake Fluid And A Hose Comming From The Bleed Valve And The Ither End Should Be Sitting In The Jar In The Brake Fluid. Before The Person Holding The Brakes Releases Tighten The Valve And Then Release The Brakes. Pump, 1,2,3, Then Open The Valve Again To See If Any Air Bubbles Are Visible Coming From The End Of The Hose In The Brake Fluid If So Much As 1 Is Visible Repeat Again. Once Finished Move On To The Other Side. You May Have To Do All 4 Valves One On Every Brake.
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It is most likely you have air in the brake fluid. The first press of the pedal compresses the air and the effect lasts for a little while.
Another cause may be warped (bent) rotors, the pads can be pushed back into the calipers by the off center area of the rotor. This means that the pads have to travel further in order to contact the rotors when you press the pedal.
There is air in the calipers and they need to be bled. Have an assistant pump the brake pedal a couple of times then hold it down. Loosen the bleed screw on the caliper, then tighten and have them pump the pedal again. Repeat until all the air is out of the system. Keep an eye on the brake fluid reservoir so it doesn't run out, or you will end up having to bleed the whole system.
DId you bleed the system after you changed the caliper? If the Master cylinder lost it's fluid while you were changing the caliper, then there is air in the system and you need to bleed the entire system. start with the REAR RIGHT, then the REAR LEFT and then the FRONT RIGHT and last the FRONT LEFT. make sure the master cylinder NEVER runs low on fluid and DO NOT re-use any fluid that you get out of the calipers.
try holding the brake pedal down overnight with a broom jammed into the seat ?? if that doiesnt work then bleed the brakes and if still no joy then ask a local mechanic to diagnose for you before you spend a fortune on unecessary parts
your power brake booster is blown out
the seal has a leak in it
run the truck for 3 minutes and shut it off. with the windows up listen carefully while you gently apply the brakes
listen for a hissing sound of air leaking.
the sound of these leaking is a very soft sound
Something doesn't sound right, you shouldn't have to remove the brake line to install pads. Did you have to do this on both sides? Do the new pads and the old pads look the same? Did you get the caliper on crooked? Just recheck your work first before replacing more parts. When you install the caliper, You have to hook the pad on one side first before you slide it over the rotor.
Did you bleed the wheel furthest away from the master cylinder? THen next furthest, to closest last. Did u make sure the master cylinder never got low enough to draw in air? To bleed, Pumo brakes 3x, holding pedal down 1/2 way, while bleeder is opened, let air/fluid flow, shut bleeder as flow diminishes so no air gets in the line. Is the car running when u bleed brakes? It should be. If u are doing all of this u should feel your pedal coming back (getting firm). Let me know how you make out. countrycurt0