86 F150 brake problem
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86 F150 brake problem
I recently experienced the wooshy power brake booster on my 86 f150. The brake pedal was still firm and I could brake hard in emergencies if needed but I knew it needed to be replaced.
So I replaced the booster and the master cylinder with re-manufactured ones . (And I bench bled the master cylinder.)
Then I replaced all the bleeder screws and had someone help bleed all the lines.
Now the brakes feel like the power booster isn't there. I went around and re-bled all the lines and even test drove it stopping a little bit here and there and backing up as well. They still feel like they're manual brakes with no booster.
Any suggestions?
So I replaced the booster and the master cylinder with re-manufactured ones . (And I bench bled the master cylinder.)
Then I replaced all the bleeder screws and had someone help bleed all the lines.
Now the brakes feel like the power booster isn't there. I went around and re-bled all the lines and even test drove it stopping a little bit here and there and backing up as well. They still feel like they're manual brakes with no booster.
Any suggestions?
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Just as an extra bit of info...The pedal will get hard after 2 or 3 pumps when the truck is off but when I turn it on it starts acting up.
How do I check the check valve?
How do I check the check valve?
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Pull the vacuum hose off the valve (its that l shaped fitting on the booster), attach a clean hose to it, and suck on the hose, you should be able so suck a decent amount of air through it, then try blowing in the hose, it shouldn't allow any air movement in that direction
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Pull the vacuum hose off the valve (its that l shaped fitting on the booster), attach a clean hose to it, and suck on the hose, you should be able so suck a decent amount of air through it, then try blowing in the hose, it shouldn't allow any air movement in that direction
Decided to remove the hose from the booster altogether and the pedal stayed firm but the stopping power was definitely lacking.
Any other suggestions?
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How about pushrod length? Could this be the cause of the pedal going about 3/4 inch before it starts braking?
If so, do you adjust this by just turning it left to lengthen and right to shorten?
If so, do you adjust this by just turning it left to lengthen and right to shorten?
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Turns out that all I needed was to turn the screw on the pushrod for the booster out a bit and everything is great now.
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Postmaster
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Good to hear he hort it working Thats becoming rather common it seems, about a year ago, we got a serious of 3 defective steering racks from them for a volvo, just recently we bought a few defective distributors from them, so its no surprise to hear they're making defective brake boosters too
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