My brake pedal can back out of the master!!!
#2352711
08/12/17 03:27 AM
08/12/17 03:27 AM
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Joined: Jan 2003
Posts: 4,244 Canada
Kam*Kuda
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,244
Canada
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Am I missing a part? This is a 68 road runner manual brakes
Let's see if you can see this image
https://www.flickr.com/photos/153614762@N02/?
Last edited by Kam*Kuda; 08/12/17 03:39 AM.
1970 Barracuda Convertible 1968 Satellite Street Strip car 1654.5 Mustang 1955 Land Rover
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Re: My brake pedal can back out of the master!!!
[Re: Kam*Kuda]
#2352720
08/12/17 04:36 AM
08/12/17 04:36 AM
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Joined: Aug 2011
Posts: 2,872 Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,872
Pattison Texas
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there should be a rubber piece that goes on the end of the rod,there is a groove that the rubber fits in, it is what holds the rod in the master.
Last edited by csk; 08/12/17 04:38 AM.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: My brake pedal can back out of the master!!!
[Re: Kam*Kuda]
#2352784
08/12/17 11:58 AM
08/12/17 11:58 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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have your parts house cut a piece of vacuum line of the right dia (7/16 iirc but don't quote me), just long enough to slide on the end of the pushrod into the groove on the end like in the pushrod in the pic. The tailor made ones have a thin/shallow groove lengthwise along the neoprene piece which might be to let the air out as it is installed into the tapered blind hole or it might be nothing & just from how it was held when it was mfr'd. Lube it, as it is a tight fit.
live every 24 hour block of time like it's your last day on earth
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Re: My brake pedal can back out of the master!!!
[Re: RapidRobert]
#2352795
08/12/17 12:29 PM
08/12/17 12:29 PM
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Joined: Jan 2003
Posts: 4,244 Canada
Kam*Kuda
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,244
Canada
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I do have the rubber piece It stays in place but if I pull back on the pedal it will come out
I looked at my cuda and this cant happen with that setup
It seems a safety issue. A local car had this happen on the track and had no brakes with disastrous results
I was going to weld in a bracket to create a stop to prevent it from being able to be backed out.
I was wondering if I was missing a part on the pedal assembly
1970 Barracuda Convertible 1968 Satellite Street Strip car 1654.5 Mustang 1955 Land Rover
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Re: My brake pedal can back out of the master!!!
[Re: Kam*Kuda]
#2352811
08/12/17 12:58 PM
08/12/17 12:58 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I do have the rubber piece It stays in place but if I pull back on the pedal it will come out Look down in the rear piston "thimble" in the back of the MC & there must be a shallow but wide circular groove about halfway down for the neoprene piece to lock into as opposed to it being a smooth taper like a sewing thimble, otherwise it just pulls back out like it is doing. manual brake MC's must have that recess. power brake MC's can function with or with out the recess cuz they are setup different & as you know you want the right piston bore diameter for your app. EDIT Rick Ehrenberg iirc used silicone to lock it in there which I thought would be risky but Eberg has forgotten more info than I know so I would be OK with that as a solution.
Last edited by RapidRobert; 08/12/17 01:01 PM.
live every 24 hour block of time like it's your last day on earth
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Re: My brake pedal can back out of the master!!!
[Re: Kam*Kuda]
#2352900
08/12/17 05:18 PM
08/12/17 05:18 PM
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Joined: Jan 2003
Posts: 25,988 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,988
Rio Linda, CA
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In some installations the brake light switch will prevent the pushrod from backing out; looks like yours is missing.
Fabricate a bracket to act as a pedal up stop.
The INTERNET, the MISinformation superhighway
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Re: My brake pedal can back out of the master!!!
[Re: John_Kunkel]
#2352949
08/12/17 06:57 PM
08/12/17 06:57 PM
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Joined: Jan 2003
Posts: 4,244 Canada
Kam*Kuda
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,244
Canada
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In some installations the brake light switch will prevent the pushrod from backing out; looks like yours is missing.
Fabricate a bracket to act as a pedal up stop.
yes I will fabricate something The car is a procharged bb so its getting quicker and I could get into problems fast
1970 Barracuda Convertible 1968 Satellite Street Strip car 1654.5 Mustang 1955 Land Rover
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Re: My brake pedal can back out of the master!!!
[Re: 71charger]
#2353315
08/13/17 06:35 PM
08/13/17 06:35 PM
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Joined: Jan 2003
Posts: 25,988 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,988
Rio Linda, CA
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The '55 has a positive pedal up stop...the BL switch is on the master cylinder.
The INTERNET, the MISinformation superhighway
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