Topic: Assembly line brake booster check valve

[Bob Gaines]

This picture is of an original Mustang assembled in Dearborn on Feb 16, 1968.

The pictured later 68 style check valve is more difficult to find then the 67/early 68 style from my experience .

[Texas Swede]

If I don't recall wrong, there was  a recall of the 67 valve due to problems during rain and the white valves got a red mark
to show they were fixed.
Texas Swede

[Bob Gaines]

If I don't recall wrong, there was  a recall of the 67 valve due to problems during rain and the white valves got a red mark
to show they were fixed.
Texas Swede

The assemblyline and the already painted service replacement booster/master assemblies which had the check valve installed had a red paint daub over the black paint. Over the counter white ones had the red paint daub also. Later service booster/master assemblies dropped the red marking because the below standard check valves had worked their way out of the system. The later manifold marked check valves did not have a red paint daub.

[J_Speegle]

Some pictures

First campaign/recall - just the check valve


New and improved check valve-C7AZ-2365-A




Second campaign/recall. Booster with earlier improved check valve





Related other threads

https://www.concoursmustang.com/forum/index.php?topic=412.msg2042#msg2042

https://www.concoursmustang.com/forum/index.php?topic=4264.msg69210#msg69210

Of course many people restoring earlier cars choose to restore their cars with the improved parts and leave the paint marks off so they reflect how the cars was originally built but with the upgrades hidden

[Bossbill]

Is the plastic protector on the master cylinder side of the booster used only on Midland manufactured boosters?

I have a decades old  Ford logo booster with that exact protector and wonder if the remanufacture industry used these as well?

[RoyceP]

I think perhaps you are thinking of the aluminum / plastic filter assembly used on the Midland boosters?

Is the plastic protector on the master cylinder side of the booster used only on Midland manufactured boosters?

I have a decades old  Ford logo booster with that exact protector and wonder if the remanufacture industry used these as well?

[Bossbill]

In Jeff's picture right where the "Ph" is in the word Photobucket is a plastic cone shaped protector that also holds the push rod in place.

I wondered if this protector was unique to Midland. I have one without the box and wondered about this unique(?) piece and if it might signify an original reman from Ford/Midland?

[Bob Gaines]

In Jeff's picture right where the "Ph" is in the word Photobucket is a plastic cone shaped protector that also holds the push rod in place.

I wondered if this protector was unique to Midland. I have one without the box and wondered about this unique(?) piece and if it might signify an original reman from Ford/Midland?

That protector is typical for new Midland boosters in the box when purchased over the Ford service counter or one that you would buy at the local auto parts store new in the box. I think I have seen some remanufactured ones used that over the years too. I don't think the plastic protector adds any particular significance one way or the other. It could be a original remanufactured or NOS even without the protector. They could fall off when the booster was stored out of the box. i have seen that many times . Many times the boosters were serviced with the master cylinder already installed and of course there would be no protector . 

[Bossbill]

Thanks Bob.
It's hard IDing parts this old out of the box. I'll check the aluminum tag and see if that offers any help.

[Bob Gaines]

Thanks Bob.
It's hard IDing parts this old out of the box. I'll check the aluminum tag and see if that offers any help.

That isn't the only problem with the booster. Many times old or even NOS boosters will have the rubber diaphragm inside deteriorate and leak air . Given how hard it is to change them once installed with the master cylinder and brake bleeding etc. I recommend having a fresh rebuild done on any that are installed regardless of if NOS or not . With a NOS one you have like a 50 50 chance of it leaking from my and others experience.

[Bossbill]

Silly me. Here I thought I caught a break finding something I wouldn't have to mess with.

Thanks for the feedback.

[Bossbill]

Are the C8ZA-H aluminum tags on the Ross-Midlands as common as the C7ZAs?
Can anyone decode the rest of this tag or is it just a Midland number?

[J_Speegle]

Are the C8ZA-H aluminum tags on the Ross-Midlands as common as the C7ZAs?
Can anyone decode the rest of this tag or is it just a Midland number?

Sorry have not figured out nor honestly spent much time focusing on the bottom line. Most likely IMCO its likely the suppliers internal number for their purposes

[warwick]

My Midland-Ross Tag is:

C8ZA 2B195-H
C-4262-AA

The C8ZA 2B195-H if the Ford PN and the C 4262-AA is the MR PN and identifies the booster variant. You can search for parts using it with the brake specialists.

[Bossbill]

Ok, here is my hidden agenda.
I have a NOS Midland booster with the tag above. The booster has Ford script so it's not assembly line. And, if the tag is to be believed it's a 68. What's interesting is that it's a C8ZA not a C8ZZ as most replacements might be.

I also have my original booster (not original to my 67 car) with no tag. I wanted to see if I could trade this C8 tag for a C7 tag if the two were equally common. I understand you can't usually see it but I going for better than Concours Div II.

The 68 booster also has the "MANIFOLD" small tit check valve which I understand is more valuable than the more common 67s.  I was going to try a trade plus cash but I found an expensive 67 NOS version online with rubber and crimp clamp.