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single reservoir master ... which outlet feeds brake lines ?
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dodge59
Posted 2020-03-24 8:25 PM (#595976)
Subject: single reservoir master ... which outlet feeds brake lines ?



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Posts: 744
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Location: Milwaukee Wisconsin

I'm looking at  a  single reservoir  power brake  master cylinder  for a   59 mopar  . which line feeds the brakes lines? top or bottom hole on the master . I've seen pics of it in both positions .  which is  the right way  ? shop manual shows brake line coming in from  the bottom to bottom hole and   top  one  is for  the brake sender  to screw in .. does each outlet have the same amount of  pressure ?



Edited by dodge59 2020-03-24 8:59 PM
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56D500boy
Posted 2020-03-24 11:04 PM (#595981 - in reply to #595976)
Subject: RE: single reservoir master ... which outlet feeds brake lines ?



Expert 5K+

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Location: Lower Mainland BC
.
This is your chance to go for a dual master for not much more effort or cost.

The single has the pressure-based brake switch at the end of the master. The brake line is the port that goes down.

No use wasting money on a single reservoir master when you can, for a few dollars more,(or actually less, you can get a dual.

Don't forget to bench bleed.

Single:

https://www.rockauto.com/en/catalog/plymouth,1957,belvedere,5.1l+313...



Dual:

https://www.rockauto.com/en/parts/cardone+select,131323M,%3Cspan%20c...



Edited by 56D500boy 2020-03-24 11:08 PM
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dodge59
Posted 2020-03-25 9:33 AM (#595994 - in reply to #595976)
Subject: Re: single reservoir master ... which outlet feeds brake lines ?



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Posts: 744
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Location: Milwaukee Wisconsin
Yes , at some point I will upgrade .. I seen others use that rubber brake line hose . Is that what you used ?
For my application..... my brake line has to come in from the bottom with a sharp 90* angle. That hose might be a good idea .



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dodge59
Posted 2020-03-25 9:53 AM (#595997 - in reply to #595976)
Subject: Re: single reservoir master ... which outlet feeds brake lines ?



Elite Veteran

Posts: 744
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Location: Milwaukee Wisconsin
I did some searching on the master for the 59 dodges and it seems that most if not all have the main brake line in the top port of the master . brake light switch is on the bottom sooooo , there must be equal pressure on each port hole.
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1960fury
Posted 2020-03-25 10:27 AM (#595998 - in reply to #595976)
Subject: Re: single reservoir master ... which outlet feeds brake lines ?



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I would be highly surprised if these cars ever roled of the assenbly line with the brake line at the bottom, since the residual valve sits at the end of the MC.
At least in all the cars I've ever owned (59-61) and these of course had the brake line connected to the top (nose) of the MC from the factory.
So IF (?) you have a OE MC with the residual valve at the bottom, you MUST connect the brake line there.

Edited by 1960fury 2020-03-25 10:31 AM
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dodge59
Posted 2020-03-25 10:42 AM (#595999 - in reply to #595976)
Subject: Re: single reservoir master ... which outlet feeds brake lines ?



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Posts: 744
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Location: Milwaukee Wisconsin
<p>here is one  from a 56 dodge with the main brake line feed is on the bottom .</p>

Edited by dodge59 2020-03-25 10:44 AM




(1956Dodge_04_700.jpg)



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dodge59
Posted 2020-03-25 10:54 AM (#596000 - in reply to #595998)
Subject: Re: single reservoir master ... which outlet feeds brake lines ?



Elite Veteran

Posts: 744
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Location: Milwaukee Wisconsin

just looked at more pics on the internet and it appears the main feed  line is on the nose outlet for 59 mopars ..

       another question  ...............  are single reseviors masters  manual or for  power. brakes ..  any different internally ? 

I have both here and they appear to be the same except for bore size .

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dodge59
Posted 2020-03-25 10:57 AM (#596003 - in reply to #595976)
Subject: Re: single reservoir master ... which outlet feeds brake lines ?



Elite Veteran

Posts: 744
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Location: Milwaukee Wisconsin
one more question ........ can I use heater hose for the hoses that are on the power brakes units from intake to vac tank and from tank to Booster or do I need the high pressure hoses so they won't collaspe ?
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wizard
Posted 2020-03-25 1:19 PM (#596013 - in reply to #595976)
Subject: Re: single reservoir master ... which outlet feeds brake lines ?



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I use hydraulic braided return hoses for that purpose, won't collapse. The heater hose might collaps with the combined heat and vacuum.
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dodge59
Posted 2020-03-26 11:44 AM (#596058 - in reply to #595981)
Subject: RE: single reservoir master ... which outlet feeds brake lines ?



Elite Veteran

Posts: 744
50010010025
Location: Milwaukee Wisconsin

I have a power brake  master that is like the one you have with the sender on the nose port  and a hose on the bottom for the feed. the issue is............... that lower hose fitting hole  is different than a say a 59 dodge master. appears the master I have here is a for a 57 , from what I gathered on the sites is that 57 had a rubber hose line for the feed  .  just to point out that older 57 master has a different threaded hole to accomadate a  so called brake line fitting end. .  correct me if I'm wrong . I tried all kinds of brass fittings to screw/adapt  into the sender hole   and I haven't found one yet.

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normsclassicradio
Posted 2020-03-26 2:33 PM (#596070 - in reply to #596003)
Subject: Re: single reservoir master ... which outlet feeds brake lines ?



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Posts: 208
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I use Weatherhead H10008 hose from Napa for vacuum line runs. Available in different ID's. Fabric braids make it very flexible without kinking.

https://s7d9.scene7.com/s7viewers/html5/ZoomViewer.html?config=Genui...
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wizard
Posted 2020-03-26 2:58 PM (#596072 - in reply to #595976)
Subject: Re: single reservoir master ... which outlet feeds brake lines ?



Board Moderator & Exner Expert 10K+

Posts: 12176
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Location: Southern Sweden - Sturkö island
Practically, both outputs are after the residual valve, so - it doesn't matter.

BUT the correct is to connect the switch to the lower output since that has a restriction.




(Service_Brakes_Fig_18.jpg)



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1960fury
Posted 2020-03-26 3:43 PM (#596074 - in reply to #596072)
Subject: Re: single reservoir master ... which outlet feeds brake lines ?



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wizard - 2020-03-26 2:58 PM

Practically, both outputs are after the residual valve, so - it doesn't matter.

BUT the correct is to connect the switch to the lower output since that has a restriction.


Okay, this could be an explaination why there is so much trouble with the switches, since day one.
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wizard
Posted 2020-03-26 4:55 PM (#596080 - in reply to #595976)
Subject: Re: single reservoir master ... which outlet feeds brake lines ?



Board Moderator & Exner Expert 10K+

Posts: 12176
500050002000100252525
Location: Southern Sweden - Sturkö island
Yes Sid, the hydraulic switches was a drag - already in 61 mechanical switches was installed.

The mechanical switches saves many milliseconds as they can be adjusted to close the circuit just as the brake pedal is pressed down a little, even before hydraulic pressure is present.

All eventual gunk and residue ended up in the hydraulic switch, giving uneven function. Also, DOT5 brake fluid leaks through the hydraulic switch, even if brand new.
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