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08-27-2013, 10:38 AM
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#1 |
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Registered User
 
Join Date: Jan 2013
Location: Anaheim, CA
Posts: 263
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PB Question
Just put PB in my truck yesterday, but the pedal doesn't feel right. It doesn't seem to be coming up all the way, and the picture shows the bracket not returning all the way to the firewall after pressing the brakes in as I'm assuming it should. I have to pull it up with my foot to bring it up all the way.
Is this normal? I doubt its the MC, its pretty new and been working fine for months. No vacuum leaks, pulling vacuum straight off the manifold, and its a brand new booster. The master is fenco and the booster is bendix. I didn't mean to mix it up, but I assume it shouldn't matter? Could the booster be bad? Or am I just thinking too much because power brakes feel so strange after manual for so long? It does feel as if the brakes are slightly dragging, but that could be just cuz I'm thinking about it too much
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Josh 72 C10, 350/2004r, Porter Steel Pacs, and 40+ years of leftovers from strange POs... |
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08-27-2013, 10:39 AM
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#2 |
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Registered User
Join Date: Jan 2013
Location: Anaheim, CA
Posts: 263
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Re: PB Question
The pic is after pressing the brake in and letting off, to clarify. That's as far as it will return by itself without me pulling up on the pedal
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Josh 72 C10, 350/2004r, Porter Steel Pacs, and 40+ years of leftovers from strange POs... |
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08-27-2013, 03:43 PM
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#3 |
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Registered User
Join Date: Jan 2013
Location: Anaheim, CA
Posts: 263
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Re: PB Question
Well, if i push in the pedal with the engine off (no vacuum in booster) the pedal does fully return. So it appears that there is nothing binding and the pedal pushrod angle is ok.
Maybe springs inside the booster? Im not sure. It is definitely dragging the brakes slighty by not fully returning though.
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Josh 72 C10, 350/2004r, Porter Steel Pacs, and 40+ years of leftovers from strange POs... |
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08-27-2013, 04:32 PM
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#4 |
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Formerly- 1972SuperCheyenne
Join Date: Oct 2008
Location: Wake Forest NC
Posts: 5,782
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Re: PB Question
Unplug the vacuum from the booster and see what it does. (Or crimp the hose with some vicegrips, that works fine too)
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--Josh My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218 A good crossthread is better than Loctite any day. Life is not about what you have, but who you have to share it with. |
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08-27-2013, 04:33 PM
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#5 |
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Formerly- 1972SuperCheyenne
Join Date: Oct 2008
Location: Wake Forest NC
Posts: 5,782
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Re: PB Question
Also, does your truck have a spring on the brake pedal that is supposed to help pull pedal back?
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--Josh My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218 A good crossthread is better than Loctite any day. Life is not about what you have, but who you have to share it with. |
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08-27-2013, 04:45 PM
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#6 |
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Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,141
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Re: PB Question
Do you have the return spring installed?
Posted via Mobile Device
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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08-28-2013, 10:33 PM
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#7 |
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Registered User
Join Date: Jan 2013
Location: Anaheim, CA
Posts: 263
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Re: PB Question
Turned out the booster pushrod was adjusted too far out. Now its workin good!
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Josh 72 C10, 350/2004r, Porter Steel Pacs, and 40+ years of leftovers from strange POs... |
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