Topic: Midland Booster Identification

[TonyH]

I found a Midland power brake booster with a tag that has the following numbers C7ZA-2005-B and C-4262-D.  Haven't been able to Google anything that makes sense and I don't have any catalogs that cover this part.  Curious if anyone has information on how to ID this.  Appreciate any assistance...thanks!

v/r
Tony

[67gta289]

The 67 MPC lists

C7ZZ-2005-A as Midland-Ross booster for Mustang with disc brakes
C7ZZ-2005-B as Midland-Ross booster for Mustang with drum brakes

Not an exact match but with no additional information I would have to lean towards the drum brake version.

[TonyH]

Great...thanks John!

v/r
Tony

[196667Bob]

Tony : The previous page in the 1967 MPC shows that the C7AZ-2005-B is for "Full Size 1967 Fords (except Sta Wagons) with Drum Brakes".

Bob

Added 02/14/2019 : Note that the C7AZ Part Number does not apply to Tony's case, as his C7ZA is a "tag": number, which is an "ID" number.

[TonyH]

Thanks Bob.  Do you know if there is any significance in the ordering of the 3rd and 4th characters (C7ZA versus C7AZ)?

v/r
Tony

[67gta289]

The third character represents the vehicle that the part was designed for, A ("A body") for full size Ford; Z = Mustang.   With that said, you will find many "A" parts used on a Mustang, but probably never find a "Z" part used on a Galaxie.  You would find "Z" parts used on a Cougar.

The fourth character Z = a service part.  If I recall correctly, all other letters in the fourth position represents the group that did the design.  A C7AE would be a part designed by the engine engineering group for example.

There are a lot of nuances, but that should provide some basic information.

Because your part starts with C7Z, to me it is clear that it was designed for the 1967 Mustang, and would most likely be used for the Mustang or Cougar.  The last letter of "A" is a chassis design item.  The MPC is service oriented, so it lists service parts.  Often the engineering part number becomes the service part number with a simple change of only the fourth digit to a "Z".  Other times it is significantly different.  Another common situation is a collection of individually engineered parts that are grouped together an an assembly or kit, and those service numbers may not reflect any individual component making it up.

[196667Bob]

Tony : To explain a little further in what John has just presented (as well as for those that may not know the "Total Part Number" deciphering, here is a little more to wet your whistle.

Using the following as a generic Part Number, and using lower case letters for the generic to distinguish between the generic and actual Part Numbers which used all caps, here is a breakdown :

Part Number - abcd-efghijk-l

a = Decade (Ford began this system of Part Numbering in 1950, starting with "B".

b = Year of the decade (0 through 9)

c = Model for which Part was originally designed (see table below)

d = Engineering Division for which Part was Designed (see second table below)

efghijk = Group Number that Part fits into ( see attachments 3,4 and 5) - this could be 4 to 7 characters long, and could include the body type preceding the Group Number if a
              part was designed only for a specific body type of the Model listed. For example, a C7ZZ- 63xxxxx would be a Ford Service Part designed for a 1967 Mustang Fastback.

l = Design Version or Change

The Part Number represents the Model the particular part was originally designed for. As John noted, many times the same exact part was used for other Models, and thus you many times see Mustang Parts that are C7A-, C7S-, etc.

Taking into account all of the above, the Power Brake Booster sown in attachment # 6, C7WA-2005-B, was originally designed as a Lincoln/Mercury Chassis Part for a 1967 Cougar, but may have other applications for which it will work.

Hope this will be of help.

Bob

[krelboyne]

Here is a snap shot from the Mercury MPC. Been trying to save some of these tags, they do not appear to have any dates,
Our shop has received some "other than Mustang and Cougar' Midland brake boosters. The clam shell half that faces the master cylinder is one of the differences. The flat spot with the hole for the vacuum port is clocked differently.
Some also have a provision on the firewall side for a lever (Fairlane?)

[preaction]

I just went through this with booster Dewy when the front half flat spot doesn't clock correctly for  Mustang/Cougar the front half is mid size car.

[TonyH]

Thanks everyone!  New to this so really appreciate the background info.

v/r
Tony

[196667Bob]

Tony : In case you missed it, note that my comment in Reply # 3 is for a C7AZ Booster, not a C7ZA Booster as stated in your opening Post. Based on my "Part Numbering Deciphering lesson", yours would be for a Mustang, Designed for the Chassis Division. Thus yours, like my C7WA, could be an Assembly Line version (since neither is shown as a Service Part). Anyone else agree with this supposition ?

Bob

[RoyceP]

I thought it was really odd that your post was referring to a part that none of us were discussing or cared about. Obviously C7Z or C7W boosters could have been OEM on 1967 Mustang or Cougar since both offered the same exact brake system options other than the front to rear brake supply line which must be longer on the Cougar.  The Midland part number C-4262-D is also specific to those applications.

Tony : In case you missed it, note that my comment in Reply # 3 is for a C7AZ Booster, not a C7ZA Booster as stated in your opening Post. Based on my "Part Numbering Deciphering lesson", yours would be for a Mustang, Designed for the Chassis Division. Thus yours, like my C7WA, could be an Assembly Line version (since neither is shown as a Service Part). Anyone else agree with this supposition ?

Bob

[196667Bob]

Royce : I am going to modify my Reply #3 to make it more clear that it doesn't apply to Tony's Booster. I was apparently originally thinking that Tony mixed up the Part # and meant that it was C7AZ, instead of C7ZA. However, when I looked again before I made my last Post, it was clear that he implied that the "Tag" noted the C7ZA, not a part number, and "Tags" are like "casting ID #'s", which don't usually "mimmick" Part Numbers.

Sorry for my confusion.

Bob

[RoyceP]

That's kind of what I thought when I read your post and then looked again at his photo to see if maybe I was missing something. Don't feel bad I am personally capable of screwing up nearly anything I type or do.

Royce : I am going to modify my Reply #3 to make it more clear that it doesn't apply to Tony's Booster. I was apparently originally thinking that Tony mixed up the Part # and meant that it was C7AZ, instead of C7ZA. However, when I looked again before I made my last Post, it was clear that he implied that the "Tag" noted the C7ZA, not a part number, and "Tags" are like "casting ID #'s", which don't usually "mimmick" Part Numbers.

Sorry for my confusion.

Bob

[TonyH]

It’s cool...I was tracking.  Thanks again!

v/r
Tony