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Master cylinder
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Forgotten 61
Posted 2019-07-02 10:07 PM (#584366)
Subject: Master cylinder



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Thanks to everyone that's contributed information and encouragement.
I have another puzzler. I'm sure there's a trick to effectively checking/filling the master cylinder equipped with power brakes.
The booster is giving me fits.
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56D500boy
Posted 2019-07-02 11:15 PM (#584372 - in reply to #584366)
Subject: RE: Master cylinder



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Forgotten 61 - 2019-07-02 7:07 PM
I have another puzzler. I'm sure there's a trick to effectively checking/filling the master cylinder equipped with power brakes.


When I asked, the answer was "Turkey baster" (buy your own, don't borrow the wife's) and a few others.

REFERENCE: http://www.forwardlook.net/forums/forums/thread-view.asp?tid=63686&...





Edited by 56D500boy 2019-07-02 11:18 PM
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Forgotten 61
Posted 2019-07-03 12:25 PM (#584390 - in reply to #584366)
Subject: RE: Master cylinder



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That's brilliant ! Which is probably why I didn't think of it.
Thank you again
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chipplake1
Posted 2019-07-03 10:41 PM (#584425 - in reply to #584366)
Subject: RE: Master cylinder



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I'm in the exact same predicament with my '59 Plymouth, I wonder what on earth they were thinking with this set-up?! Apparently, the thought of ever having to refill the cylinder wasn't on their minds when being designed- but the fact it was still like that in '59 as in '55-6- surely someone else had to have questioned the absurdity during those years?! Anyway, turkey baster it is- good tip!

When did Chrysler finally change it to the manageable booster/cylinder set-up? I thought it would have been with the all new 1960s but apparently not if this is an issue with a '61!

Edited by chipplake1 2019-07-03 10:47 PM
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Forgotten 61
Posted 2019-07-05 1:20 PM (#584462 - in reply to #584366)
Subject: RE: Master cylinder



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I could be wrong but I think it wasn't till 64 or 65 that the master cylinder went to dual chambers and redesigned the power boosters.
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normsclassicradio
Posted 2019-07-05 3:37 PM (#584464 - in reply to #584462)
Subject: RE: Master cylinder



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Forgotten 61 - 2019-07-05 11:20 AM

I could be wrong but I think it wasn't till 64 or 65 that the master cylinder went to dual chambers and redesigned the power boosters.


I think 64 was the first year for tandem booster/master cylinder. 66 for dual circuit master cylinder.
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ronbo97
Posted 2019-07-05 7:37 PM (#584478 - in reply to #584464)
Subject: RE: Master cylinder


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'No' to the turkey baster idea. Here's what you need.

Most auto parts stores sell a small funnel with a flexible plastic extension. The extension is about 12" long and is permanently attached to the funnel. That's what you need.

Ron

 

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mobileparts
Posted 2019-07-06 1:50 AM (#584487 - in reply to #584366)
Subject: Re: Master cylinder


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For you guys who are guessing, if you want to be perfect --
The Mopar world went to tandem boosters in 1963.
Dual master Cylinders began in 1967 in the Mopar world, with the
Federal Mandate.
(Other car manufacturers already had dual master Cylinders as
Early as 1962 -- including Rambler, of all manufacturers.....)
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56D500boy
Posted 2019-07-06 10:12 AM (#584492 - in reply to #584478)
Subject: RE: Master cylinder



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ronbo97 - 2019-07-05 4:37 PM Most auto parts stores sell a small funnel with a flexible plastic extension. The extension is about 12" long and is permanently attached to the funnel. That's what you need.



So something like this? I can see how that *SHOULD* work but I can also see spillage due to the lag between pouring fluid into the funnel and the fluid coming out of the hose. Very easy to over estimate the amount of fluid needed and by that time, it's too late. BTDT.

YMMV





Edited by 56D500boy 2019-07-06 10:13 AM
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ronbo97
Posted 2019-07-06 12:06 PM (#584494 - in reply to #584492)
Subject: RE: Master cylinder


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Same shape, but smaller and plastic extension. Add a little at a time. Doesn't need to be 'topped off'. As long as it is mostly filled. That's what I do.

Ron

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58coupe
Posted 2019-07-06 1:02 PM (#584498 - in reply to #584366)
Subject: Re: Master cylinder



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What I used to do on my Furys with the diaphragm type booster was have someone step on the brake pedal and hold it while I filled the reservoir or use a block of wood if alone. I had to remember not to fill it to the top or it would spillover when the brakes were released. Of course, first start the engine to build vacuum.

Edited by 58coupe 2019-07-06 1:04 PM
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Forgotten 61
Posted 2019-07-11 4:34 PM (#584708 - in reply to #584366)
Subject: Re: Master cylinder



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What about removing the booster all together and going with manual brakes.?
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Forgotten 61
Posted 2019-07-15 9:01 PM (#584875 - in reply to #584366)
Subject: Re: Master cylinder



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Has anyone changed from power to manual brakes ?
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61Fury2drht
Posted 2019-07-20 2:20 PM (#585030 - in reply to #584366)
Subject: Re: Master cylinder


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My personal opinion is, to make the best of a hare-brained design, use the turkey baster. Under the circumstances, it’s the “perfect” solution. The funnel just leaves too much room for error. But man, with all due respect to Chrysler engineering at the time, this was a fail from the get-go.
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westaus29
Posted 2019-07-20 10:10 PM (#585037 - in reply to #584366)
Subject: Re: Master cylinder


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We dont have turkey basters in Oz, at least I never heard of one and had to Google it to see what they look like. I carry a 5 ml hyperdermic in my brake kit for hard to get at m/c's, can also use it to bring level down when replacing disk pads
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lonesome mopar
Posted 2019-07-21 6:32 AM (#585045 - in reply to #584366)
Subject: Re: Master cylinder



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My humble solution is this:
I welded a small tube on the cover of the master cylinder, then I added a separate plastic brake reservori from a small modern car (actually the old 1980 Fiat Panda) which has the cap with a float that activates a lamp when the level is low.
This reservoir is set on the firewall slightly above the master cylinder and connected with a short hose to the previously welded tube on the master cylinder cap.
Then you can easily top this reservoir when needed, that is when the warning lamp goes on on your ****pit.

This way I saved my car (and my ass) a couple of times when a leak happened somewhere along the brake line.
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ronbo97
Posted 2019-07-21 5:28 PM (#585057 - in reply to #584875)
Subject: Re: Master cylinder


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Forgotten 61 - 2019-07-15 9:01 PM Has anyone changed from power to manual brakes ?

Bad idea. Takes much more effort to get the car to stop using the old, vintage drums. P/B is like night and day.

Filling the m/c is not a problem if you take your time.

Ron

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1960fury
Posted 2019-07-21 6:27 PM (#585058 - in reply to #585057)
Subject: Re: Master cylinder



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ronbo97 - 2019-07-21 5:28 PM

Filling the m/c is not a problem if you take your time.

Ron



No problem at all. Just connect some short piece of hose to a small funnel, 30 second and a few cents. That this comes up so often puzzles me. It is not that you are suppose to add brake fluid like motor oil. You change it every 2 or 3 years, thats it.
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Forgotten 61
Posted 2019-07-22 8:27 PM (#585108 - in reply to #584366)
Subject: Re: Master cylinder



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The level was low, but not empty. And I was going to take the opportunity to drain and refill the system. But before I did, I wanted to know how to refill the master. That's how all this started.
This my first experience with power brakes as my other 61 has manuals. The power brake system feels sloppy, spongy and slow to respond whereas the manual car feels tighter and more responsive.
I was just wondering what prevailing opinion was regarding switching.
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Handygun
Posted 2019-07-25 12:05 PM (#585216 - in reply to #584366)
Subject: Re: Master cylinder


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I got rid of that foolish factory configuration on my 58 Plymouth and went manual with a dual 15/16 m/c and aaj disc brake kit, E body rear w/11x3 drums, no flathead either, 400+ hp 392 and never felt underbraked,FWIW.
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Forgotten 61
Posted 2019-07-26 3:40 PM (#585261 - in reply to #584366)
Subject: Re: Master cylinder



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Location: Central New York
I really wasn't considering changing to a disc system, as I'd like to keep things semi-original. I have no issues with running drum brakes.
Everything I have is equipped with drums from the factory(except for the 2014 Ram 1-ton) 70 Challenger, 70 Roadrunner, 61 Belvedere 4dr, and 61 Fury convert all have drums and they work just fine.
What I'd really like to do is swap to a more contemporary drum setup from the 70's or 80's but I have no idea what cars and parts are compatible.
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