Stiff Brakes.
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Junior User
Joined: Sep 2009
Posts: 80
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From: Tallapoosa
Stiff Brakes.
I have noticed since I got my truck (78 F150 4x4) in Nov that the breaks are very stiff. I almost have to stand on them to get the truck to stop at times, however it will stop. Here is a summary of what I have done and things I noticed.
1. Replaced all flex lines with stainless. Truck still had original front lines from 78!!
a) Bleed all four locations until nothing but fluid came out. (Two man job)
b) Checked all metal lines for crimps, binds or leaks. I found none.
c) Check for leaks at calipers and drums. Found none.
d) Test front disk calipers. They are working from a visual standpoint.
e) MC is not loosing a lot of fluid, I don’t have to fill it up every day/week
2. I have noticed after driving a few days back that the MC reservoir was damp from seepage from around the MC cap. It is on tight but from looks of the seepage it appears not to be sealing anymore.
Before I start spending anymore money on parts I was wondering what some of you all thought it might be.
1. Replaced all flex lines with stainless. Truck still had original front lines from 78!!
a) Bleed all four locations until nothing but fluid came out. (Two man job)
b) Checked all metal lines for crimps, binds or leaks. I found none.
c) Check for leaks at calipers and drums. Found none.
d) Test front disk calipers. They are working from a visual standpoint.
e) MC is not loosing a lot of fluid, I don’t have to fill it up every day/week
2. I have noticed after driving a few days back that the MC reservoir was damp from seepage from around the MC cap. It is on tight but from looks of the seepage it appears not to be sealing anymore.
Before I start spending anymore money on parts I was wondering what some of you all thought it might be.
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Junior User
Joined: Sep 2009
Posts: 80
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From: Tallapoosa
What may be obvious to some isn’t to others. 
LOL but to answer your yes I do. Its rusted to heck and back but I haven’t done anything to it yet… Sometimes it appears to be wet around the bottom of it as well.
LOL but to answer your yes I do. Its rusted to heck and back but I haven’t done anything to it yet… Sometimes it appears to be wet around the bottom of it as well.
Posting Guru
Joined: Feb 2007
Posts: 1,735
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From: Wingo, Ky
Well since you say it has one then I would guess to say it is bad. I just had to ask though, never no somebody might have switched it over to manual. I just sold a good one with a new mastercylinder on it for 50 bucks.
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Junior User
Joined: Sep 2009
Posts: 80
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From: Tallapoosa
Ok if it is the booster then it looks like I can get a rebuild one for 120 with core return. Is this about right? Also I am very mechanically skilled so I can just about do anything but is this something better left to the pros with specific tools or is this something that I can do? Note: I know everyone’s skill level opinion of themselves differs so be honest
Posting Guru
Joined: Feb 2007
Posts: 1,735
Likes: 2
From: Wingo, Ky
Well I took one off today in about 15 minutes with basic tools in the pooring rain. Not difficult at all.
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From: Tallapoosa
Sounds like I need to order that brake booster then. Thanks fellas, I do appreciate it.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com
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From: springfield Missouri area
Check the booster check valve first. Probably not the problem, but it is first thing to check. When you pull it out of the booster after truck has been running, shut off truck and pull valve from front of booster with the vacuum line attached to it. You should hear a swoosh if booster had vacuum in it. Then check valve, you should be able to suck one way and not the other, through it.
