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06-02-2021, 05:41 PM | #1 |
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Join Date: Feb 2013
Location: alaska
Posts: 26
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54 merc power brake booster
Booster seems to check out ok but when I push the pedal, it obviously loses vacuum to the point that engine almost dies. Have 16 in vacuum at manifold connection. Can find no hose leaks. Looks like a rebuild but want some expert opinions.
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red carr 54 Alaska merc |
06-02-2021, 10:24 PM | #2 |
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Join Date: Mar 2013
Location: Kent, WA. Tucson, AZ
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Re: 54 merc power brake booster
Sounds like an internal problem in the booster to me, creating a large vacuum leak. Does it still seem to be providing boost on the brakes?
Did those use the remote units like my 55 bird, or a treadle vac, or just what? |
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06-02-2021, 10:35 PM | #3 |
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Join Date: Feb 2013
Location: alaska
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Re: 54 merc power brake booster
mike
This is a treadle vac. Get no boost whatsoever and pedal is rock hard as expected without the booster. I know there are kits available and it should not be over my skill range Could it be just a check valve?
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red carr 54 Alaska merc |
06-02-2021, 11:06 PM | #4 |
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Re: 54 merc power brake booster
I don’t know. My one and only treadle vac experience was to help a friend remove one and replace it with a modern conventional booster. What I do remember is there was some complicated linkage/bellcrank that operated it. But it was a 56 Chev and you buy any kit for anything for them.
I do know they are rebuildable, I’ve no clue to the level of difficulty. Kultulz seems to have as many part numbers, etc. as anyone on here. Hopefully he or someone will chime in and help. |
06-03-2021, 04:58 AM | #5 | |
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Join Date: Aug 2012
Location: IN A 'GALAXIE' FAR FAR AWAY
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Re: 54 merc power brake booster
Quote:
You are getting 16" at the check valve? Does the check valve work correctly? Last date system was flushed? Here is a tutorial - http://ford-mel-engine.com/viewtopic.php?t=149 Feel free to ask anything you need more info on.
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***** - DISCLAIMER -
The above posted information is in my opinion only (IMO) and may contain copy and paste material(s). In addition, any above tech information is supplied in good faith. No responsibility implied or otherwise can be accepted for the way others use or interpret provided data. Your experience(s), opinion(s) and mileage may vary. DIAGNOSED CDO - (OCD In Correct Alphabetical Order) |
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06-03-2021, 08:45 AM | #6 |
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Join Date: Jul 2010
Location: Conifer, Colorado
Posts: 2,419
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Re: 54 merc power brake booster
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Rebuild kit: https://www.kanter.com/gallery.aspx?...Router=Catalog Can they be rebuilt? Yes, this is what mine looked like, when I got the car. It has worked perfectly ever since I cleaned it up and rebuilt it. So no mater what yours looks like, don't let it scare you. KULTULZ: thanks for the tutorial, it will go into my archive, wish I had had it when I was rebuilding mine, 10 years ago. Last edited by Merc Cruzer; 06-03-2021 at 09:05 AM. |
06-03-2021, 01:33 PM | #7 |
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Join Date: Feb 2013
Location: alaska
Posts: 26
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Re: 54 merc power brake booster
Ok, think I finally got logged in right.
Miker thks for the comeback. everything helps. merc cruzer.. thks, never thought about the tank maybe rusting. Chked hoses but not tank. Kultulz Thks. never thought there would be so much priceless info out there. valves are adj to '018,gauge reads steady at 16 (don't know why so low),timing is right on, service brakes will work but my 89 yr old legs won't push quite that hard anymore, fluid level stays constant. Looks like I better get out the visa card and the tool box
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red carr 54 Alaska merc |
06-03-2021, 05:02 PM | #8 | |
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Re: 54 merc power brake booster
Quote:
Something isn't quite right on the vacuum Red. Look at the chart below -
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***** - DISCLAIMER -
The above posted information is in my opinion only (IMO) and may contain copy and paste material(s). In addition, any above tech information is supplied in good faith. No responsibility implied or otherwise can be accepted for the way others use or interpret provided data. Your experience(s), opinion(s) and mileage may vary. DIAGNOSED CDO - (OCD In Correct Alphabetical Order) Last edited by KULTULZ; 06-03-2021 at 05:16 PM. |
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06-04-2021, 09:41 AM | #9 |
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Join Date: Aug 2012
Location: IN A 'GALAXIE' FAR FAR AWAY
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Re: 54 merc power brake booster
You are quite welcome. Unusual subject as they were mostly GM installed.
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***** - DISCLAIMER -
The above posted information is in my opinion only (IMO) and may contain copy and paste material(s). In addition, any above tech information is supplied in good faith. No responsibility implied or otherwise can be accepted for the way others use or interpret provided data. Your experience(s), opinion(s) and mileage may vary. DIAGNOSED CDO - (OCD In Correct Alphabetical Order) |
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