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brake pedal travel
#1
runninpony 
Hi All, My brake booster is back in and I have zero travel on the brake pedal! It's Rock Hard! Now would that be normal since I have no vacuum to it (engine uninstalled). Brake fluid reservoir is full and have not been bled yet. Should I try to bleed the brake lines?

Old Mustangs never die, they just go faster!
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#2
You should still have travel without vacuum but have to push harder. I have a new booster in and was able to push the pedal to bleed the brakes. Not bleeding shouldnt hinder you from pushing so if i have to guess something is jaming the pedal hindering its travel or in the booster.

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        [Image: 20160929_171923_edit2_small.jpg]

1971 M-Code Mach 1 w/Ram Air, 408 stroker, 285/291 0.558" roller cam, Blue Thunder intake, TKO600, Hooker headers with electric cut-offs, FiTech EFI w/ RobBMC PowerSurge pump
4-wheel disc brakes
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#3
Or, thinking about it, the pedal may be all the way down instead of up.

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        [Image: 20160929_171923_edit2_small.jpg]

1971 M-Code Mach 1 w/Ram Air, 408 stroker, 285/291 0.558" roller cam, Blue Thunder intake, TKO600, Hooker headers with electric cut-offs, FiTech EFI w/ RobBMC PowerSurge pump
4-wheel disc brakes
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#4
(07-23-2018, 06:57 PM)NOT A T5 Wrote: Hi All, My brake booster is back in and I have zero travel on the brake pedal! It's Rock Hard! Now would that be normal since I have no vacuum to it (engine uninstalled). Brake fluid reservoir is full and have not been bled yet. Should I try to bleed the brake lines?

Your pedal should have an inch or two of travel before it gets hard
Check that you have adjusted the pushrod between booster and master cylinder correctly, if too long will get a hard pedal and brakes will come on too quickly, probably drag as well, too short and pedal will be close to the floor
Been posted here before but basically need to get a clearance of about 20 thou between the master cylinder piston and booster pushrod, hope this helps


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#5
runninpony 
Thanks, I will try to bleed everything and if that doesn't help I'll take the master off to check the push rod gap. I thought the guys who rebuilt my booster would've adjusted the gap to where it should be. I should've double checked it BEFORE I put everything back together!

Old Mustangs never die, they just go faster!
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