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Old 12-31-2010, 08:44 AM
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Power Brakes have hard pedal !

I have finally gotten mobile enuff to start troubling shooting my PB problem on my '55. First some history - - - I had my power front disc brakes installed back in 2005 and after about 2 weeks the pedal got real hard and I took it back to my buddy who had installed it and he put a new booster on and the problem was solved - - - at least for 5 years hahahaha

I checked the vacum on both side of the check valve at the booster and it was good and strong but when I step on the "hard" brake pedal it seems to change the idle on the engine.

I know that I am being very wordy but I've never done anything like this and I'm working with a bad back, hip and leg trying to get ready to go to Lucky's Chicken Oil Cruise in Bryan on the 9th so bear with me.

I guess my MAIN QUESTION is this:
Can I replace the booster from the top side and not have to bleed the brakes afterwards? Unfortunately it's only me so I have to think this out before I open up a can of worms and I am not able to get under the car at the moment.

Thanks for any and all help and advise and Happy New Year!


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Old 12-31-2010, 11:26 AM
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Yes Em, you can leave the lines connected to the M/C and pull it out of the way and switch the boosters, And you should not have to bleed the system,
i have done this a few times without any problems.JMO


Cole
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Old 12-31-2010, 11:46 AM
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Sure can .... just reinforcement
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Old 12-31-2010, 12:04 PM
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Thank ya thank ya thank ya very much

I'm on my way to the shop right now be sure and watch the 5 o'clock news
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Old 12-31-2010, 12:19 PM
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As said before it can be done. Just keep in mind you have to disconnect the push rod from the break pedal! Might be difficult with your back.

Tomi
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Old 12-31-2010, 01:13 PM
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Ouch I might have let my mouth overload my spine. Was more of a strain on the back than I thought but I did manage to get the MC disconnected from the booster and the booster disconnected from the firewall. However, it appears that there is a permanent rod coming out of the booster and thru the firewall that has a U-bracket with a pin and cotter key which keeps it from just slipping out.(Oops I didn't see FuryTom's post until I had already posted this) That may be something that I will have to recruit some help to remove but nevertheless, at least I have begun the process.

Gonna take an Ibuprophen and quit for the day.

Thanks again for the help.
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Old 01-01-2011, 08:39 AM
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Yipee, Whoopie, Yahoo and Praise the Lord!
The booster is out and I can still walk straight!



The only markings on this booster are the letters
MBM on the rubber boot.
There is nothing else anywhere on the unit.
Hmmmm, I guess the parts house can match it up if they see it, huh??

Thanks again for Y'alls help
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Old 01-01-2011, 08:45 AM
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Hey Em, The MBM is the name of the booster co your booster came from.
it came from MBM Brakeboosters company. Pretty sure MBM has a web sight if you need it. But the parts store should be able to get what you need also.JMO
Glad you got it out.

Cole
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Old 01-01-2011, 09:00 AM
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Thanks, Cole, I googled it and found that they only sell wholesale so Monday when the world decides to go back to work, I'll go see what my local PH has to offer. I'm also wondering if maybe MBM isn't the way to go for me since one of their "new" boosters went out in 2005 and then the "new" replacment booster went out in 2010. Could be just a co-inky-dink but it causes one to wonder? I'm not looking for the cheapest, I want the best on the '55.
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Old 01-01-2011, 09:31 AM
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Here's one authorized dealer of MBM parts if you do need one. I am sure there are more dealers out there i just found this one looking around for you Em , .http://www.piratejack.net/ .


Cole
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Old 01-01-2011, 09:42 AM
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Cool, since I live in the boonies I may have to order it online.

What's the difference in performance or quality between an 8" and 9" booster?
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Old 01-01-2011, 12:51 PM
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[QUOTE=What's the difference in performance or quality between an 8" and 9" booster?[/QUOTE]


JMO, Em but i don't think it would be a noticeable difference but you would gain a litttle more clearance under the hood with the smaller type. IMHO


Cole
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Old 01-01-2011, 12:53 PM
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That's probably why my buddy used that size when he installed my power front disc brakes.
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Old 01-03-2011, 11:18 AM
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UPDATE:
Went to the local-yokel auto parts in boonie Buffalo Texas and they just shook their head and one even laughed at me when I showed them the after market booster so I called the place, Cole, linked me to and ordered a new 7" double diaphram booster just like the one I have.

They promised to have it here by Friday but that remains to be seen. More info on the Friday evening news.
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Old 01-03-2011, 05:52 PM
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Em, i hope they get it to you in time to go to that cruise, You got what 6 day's surely they will.


Cole
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