Post to the EFV-8 Forum
Post Classified Ads
Shop the Online Store

User Login

Not Registered Yet? Click Here to Sign Up!

Early Ford V-8 Club Forum

FORUM RULES: Users agree to these Rules when using Forum.

The site administrator reserves the right to change the terms and conditions of the user agreement without prior notice to the user. It is the responsibility of the user to regularly review the terms of this agreement.

The user agrees to the following terms:

All information that you provide to us for your membership is correct.
You will not use your membership to spam, harrass, or exploit other members in any way.
Vulgar, Abusive, Racist and Sexist Language will not be tolerated.
Commercial-type sales postings will not be allowed.
No mass posting or flooding of the boards is allowed.
No Advertising of parts or cars; no Ebay or business/commercial ads (please use the "Classified" for ads Wanted or For Sale).
VIEWING MULTIPLE TOPICS ON SCREEN: You can choose to see more than 10 Topics at a time ... Log In and choose "Preferences" from the top bar on the Forum page. Scroll down and Change the "Default Topics Returned" parameter to 25 or 50, and save the changes. Since this setting is stored in your browser 'cookies' (if enabled), it seems to use that stored value even if you are not logged in. So, if you use a PC that you haven't logged into the forum from, the setting still seem to remain at the default.
EXTERNAL PHOTO LINKS ON FORUM: You can still use external photo links in your posts on the new forum. They follow the rules of any link in that they have to have the URL link qualified down to the full image file name (example: .jpg). The links will open in a new browser window, the same as an uploaded image attached to a post. Since an image attachment to any post does not display inline with the post, the results are the same. You can use multiple external links within a post. This link is from photos on a site from Don Clink's 'Deuce@75' albums:

http://donclink.com/deuce_75_1/images/dscn2950.jpg

Using links from photo sites such as Photobucket can help in "size" issue with uploaded attachment files. For best viewing in web browsers, photos should be around the 800x600 pixel range, and probably not more than 1024x768. Most cameras today store HUGE jpg image files, as the default settings are in the 7, 8, 10, and 12Mb image sizes. The image files that are then attached are very large, and the browser can't display the full image size without using the scroll bars. Use the re-sizing functions of your photo editing software to reduce the image to 800x600, which reduces the file sixe and the image load time in the browser. Don uses Google's free Picassa3 software, which is an excellent photo management product. All of the photo albums of the Deuce, Grand National, and Auburn that are links on the NORG site were built using Picassa's web creation functions. And it's free? (THANKS to Don Clink for the info!)
HOW DO I SHOW MY EMAIL ADDRESS ALONG WITH MY USERNAME? You can LogIn on the Forum, and select PREFERENCES. On this page Members can add optional information such as their City,State, Country; Occupation; Hobbies: list a Homepage; list AOL Instant Messanger Handle; Signature; "Make Email Address viewable to others;" and even change the number of Default Topics shown on a page. WHEN others click on your profile, they will see this information.

EFV-8 Club Forum / 1940 Ford Discussion / 40 Deluxe brake system question

Reply to Discussion | New Discussion

<< previous || next >>

Posted By

Discussion Topic: 40 Deluxe brake system question -- page: 1 2

2manybikes

03-11-2022 @ 4:13 PM

reply profile send p.m.

Member
Posts: 39
Joined: Sep 2021

TomO:

Thanks for another reply to my numerous questions. I hope to get back on the car next week.

TomO

03-08-2022 @ 8:46 AM

reply profile send p.m.

Senior
Posts: 7385
Joined: Oct 2009

I like to route the pipe through the frame and along side the left side frame rail. The best size pipe for the left side to do this, is a 1 1/2" pipe. A 1 3/4" pipe is the largest that will work on the left side.

I have photos of my Mercury's left side pipe but they won't do you much good as the frame on the Mercury is different from the Ford in 1939 and 1940.

As long as you have at least 1/2" clearance between the exhaust pipe and the master cylinder, the exhaust heat will not affect the brake fluid temperature. The brake fluid will heat up and expand with brake usage and the correct free play is critical. I am hard of hearing and I can still hear the pushrod contacting the master cylinder piston when I adjust the freeplay.

Tom

2manybikes

03-07-2022 @ 4:30 PM

reply profile send p.m.

Member
Posts: 39
Joined: Sep 2021

The weather has been nasty for so long its hard to remember being outside. I got the car out finally a couple days ago. I think my brake adjustment rod is close to where its supposed to be finally. This may be a hard question to answer but can anyone explain to me, or have a photo of the left side exhaust manifold pipe routing in relation to the master cylinder? I'm having issues with transferring photos from my phone to the computer or I would post what mine looks like. Basically mine runs under the frame below where the master cylinder mounts.

40 Coupe

12-29-2021 @ 5:12 AM

reply profile send p.m.

Senior
Posts: 1800
Joined: Oct 2009

Here is some reading for you. Note how the pressurized brake fluid returns to the master cylinder fluid reservoir and how the piston can block the very small return hole if the brake pedal adjustment is not correct or the return spring is improper.. While driving heat can build up in the brake system expanding the brake fluid. There is a check valve at the fluid output end of the master cylinder it allows a residual very small pressure to stay in the brake lines. Any pressure in the brake lines in excess of the slight residual has to bleed back to the MC reservoir or the brakes can start to bind up and the brake lights will stay "ON".

TomO

12-28-2021 @ 8:05 PM

reply profile send p.m.

Senior
Posts: 7385
Joined: Oct 2009

Do you have the correct free play of the brake pedal? Until you have it, we cannot give you further advice.

Tom

2manybikes

12-28-2021 @ 6:54 PM

reply profile send p.m.

Member
Posts: 39
Joined: Sep 2021

40 Coupe, Thank you for replying. Since my initial post, I have learned quite a bit more than I did when I started. A better description of my issues is losing my "free play" and travel to a fully depressed pedal. My return spring is present and accounted for.

I sat in the car and pushed the brake pedal down 100 times, stopping every 25 and checking to see if the brake lights came on. They did not. I think that cancels out the theory of a plugged hole in the bore. I even put some unnecessary slack in the emergency brake cable, and adjusted the rod at the master cylinder out another 3/16" or so. Still did the same thing in about 5 miles. I moved it another 3/16" or so but was unable to try that before dark. A couple days of rain in the forecast so I will report back when I can.

Is it possible to overfill the master cylinder leaving no room for expansion if the fluid heats up? Once the car sits for an hour or so the "pressure" in the system drops, the lights go off and the pedal returns to a "normal" state.

40 Coupe

12-28-2021 @ 5:36 AM

reply profile send p.m.

Senior
Posts: 1800
Joined: Oct 2009

The brake pedal return spring must be missing or broken. With the proper spring in place the brake pedal should always return all the way and should not move by itself.

This message was edited by 40 Coupe on 12-28-21 @ 5:52 AM

2manybikes

12-27-2021 @ 9:04 AM

reply profile send p.m.

Member
Posts: 39
Joined: Sep 2021

kubes40 and TomO, thanks for the additional info and clarification.

TomO, Thanks for the service manual pics, that helps too. I need to get some general repair info.

The weather is supposed to be really nice tomorrow so its back under the car!

TomO

12-27-2021 @ 8:36 AM

reply profile send p.m.

Senior
Posts: 7385
Joined: Oct 2009

You need to shorten the distance between the brake pedal and the master cylinder, so you would turn the push rod in the direction that would make the rod shorter, the nut would go away from the master cylinder. Here are 2 pages from the training manual showing what you are trying to accomplish and how to do it.

When I am under the car, I reach up and try to pull the pedal down slowly. If there is any clearance, you can hear the click as the pushrod hits the piston. If you don't hear the click, shorten the rod about 5 turns and then listen for the click. If you can't hear it try to feel the movement before the rod hits the piston. You are looking for 1/4" - 1/2" movement at the top of the pedal before the rod touches the piston.

I hope that I have cleared up your questions, if not I will try again.

Tom

This message was edited by TomO on 12-27-21 @ 8:48 AM

kubes40

12-27-2021 @ 8:08 AM

reply profile send p.m.

Senior
Posts: 3574
Joined: Oct 2009

TomO is spot o with his advice. Your issue with the brake lights comes from the rod at the master cylinder being too long in adjustment. There is a fine line between "correct" and too long / too short. Creep up on the adjustment.
Low pedal? Brake shoe adjustment... figure about .005" clearance at BOTH the top and bottom of each shoe. Arcing shoes is paramount to a properly operating brake system.

Mike "Kube" Kubarth

<< previous || next >>

PAGE: 1 2

NOTE: YOU MUST BE A REGISTERED USER AND BE LOGGED IN TO POST (and reply to) messages in this forum. If you are a first time user, please click the CREATE A NEW ACCOUNT in the masthead above to register and Log In. After that, all you do is LOG IN to enjoy using this site.

DISCLAIMER: The V-8 Club does no independent testing of any of the opinions, thoughts or suggestions presented in the website on the Forum, in the Tech Tips section, or any section. A reader should consider the website to be a forum wherein differing solutions to a particular set of circumstances may be discussed. Ultimately, the selection of an item for an individual's vehicle must be based upon the independent study of the vehicle owner in consultation with people in the hobby and restoration experts.

Early Ford V-8 Club Forum

Merchandise Questions

Membership Questions