Question about 1998 Ford F150 Regular Cab
I had the brakes at the changed, then there was almost no brakes. they have adjust the pedal in side the vehicle. the brakes was there but it got stuck. now they want to change the brake master cylinder and says that they cannot only change the seals inside they need to change the whole cyl because there as setting thats need to be done only by ford if you change the seals on the cylinder. I need to know if this is the truth.
Someyimes if the MC. level gets too low, air bubbles can get trapped in the hydraulic control unit for the ABS. and it won't matter how much you bleed the brakes, that bubble will b stuck and will cause spongy/no pedal. it this happens, only way to get it out is ABS service bleed with a professional scan tool (ones at oreilys won't cut it) to cycle the valves then re bleed system. most shops charge under $150 for this...worth a shot
Posted on Aug 02, 2013
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Posted on Jan 02, 2017
Adjust your rear brake shoes. Then rebleed the system. Start at the master cylinder Bleed master first then the wheel furthest away from the master (right rear then left rear then right front then left front. Do that and your pedal should be good.
Posted on Dec 30, 2008
Did you bench bleed the master cyl. before installing it? then when you installed the new master, did you bleed all 4 points? If yes, then check all for points for leaking caliper/s and leaking wheel cylinder/s. If the van has ABS, check the valve body for a bleeder screw and see if air bleeds out of it. If you've checked everything twice and did everything right then your new master cyl. may be defective.
Posted on Apr 29, 2009
check your brake booster and also make sure the rear shoes are adjusted up where they belong. If they are not adjusted up the brake pedal will go farther and farther toward the floor and get spongier as they go farther out of adjustment. If you adjust them up and they back down again change your self-adjusters and springs. They are readily available at your local parts store.
Posted on May 10, 2009
The LF and RR are in an independent circuit of the RF, LR wheels.
The master cylinder already has the lines hooked up in a way that if you trace the lines, you can make your own diagram.
Posted on Aug 03, 2010
Not likely that the booster is an issue. The booster would not be able to overcome the brake fluid compression.
First open and inspect all brakes for leaks, adjustment, etc. Check all brake lines.
So if no leaks, did the fluid go low in the MC? If so, pad consumption would eat more than a MC reservoir of fluid, and not require MC replacement, but rebleeding and top up of fluid. If the pads are worn, and you replace them, often this will expel air back through the MC.
If you determine the MC is faulty, bench bleed the new one before install, or you will have lots of problems getting air out....
Posted on Mar 03, 2011
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