With all of your help, I finally obtained these part numbers from the Ford Motorcraft Parts Manual for the exact brake booster and master cylinder that I need.
Can someone help me cross reference these numbers into currently available part numbers from any vendor. CONFIDENTLY!
No guessing please - I'm already on my 4th master cylinder without success.

1973 F-250 4x4 VIN=R
FRONT DRUM BRAKES AND REAR DRUM BRAKES

Booster: diameter = 8.94”
★ C9TZ 2005-B, m/w D3TZ 2005-B

Master Cyl: diameter = 1.00”
★ D3TZ 2140-A, r/b D3TZ 2140-P, D3TZ 2004-A (before Serial “S”)

★ = out of production and/or superceded

 

First off why do you keep starting new threads for the exact same problem? If someone ever has the exact problem as you the answers are spread all over the forum, makes no sense and it becomes overly tedious to help you.
I provided you with the answer to this question in the very last post of yours. Here is the best place to get the parts you want. The power booster will be your exact power booster rebuilt. If you don't know if it's the original power booster then check for the part numbers on the the power booster you have to verify it in fact is one that originally came with your truck. I provided you with that part number so you could do that. There are no new power boosters for your truck. So if the one you currently have in your truck is not the correct one then you need to find a rebuildable core somewhere else and send it into the link I provided you. Oh here's a pleasant reminder for you, the reason you are not getting the answers and help your seeking is because of your personality and the way your going about it.You can "confidently" take the steps I've laid out for you to successfully get the proper parts to repair your 1973 highboy.

 

I doubt any aftermarket vendor is going to be able to cross a manufacturer's part number. You'll need the specific application that part was use in.

 

@Torpedo51 since I last posted Rockauto does now offer a remanufactured Cardone power booster for your Truck in it's original application. Look here..

 

I'm willing and able to lookup the parts using year/make/model/options on vendor websites as you and others have suggested, but this approach isn't working for me.
For example, when I look at the part description on Rock Auto as you suggested there's only one match for 4WD... but there's also nothing in the product description to make a match with confidence: there aren't any cross reference part numbers, it doesn't indicate that the part will work for front drum applications, etc. From your perspective, looking up the part on Rock Auto appears to be my best bet. From my perspective, it isn't my best bet; I've tried most vendors using this approach unsuccessfully already. For what its worth, I bought and returned this exact part number awhile back because it didn't fit my firewall (see below). Thats why I'm trying to work forward from the Ford part numbers at this time.

On this post, I asked for help how to connect the dots between an original Ford part number and whatever is offered from today's vendors (using my parts as an example). I think its reasonable to be assertive (not offensive) to ask for confident answers that are on point. I appreciate a good spitball session as much as anyone, and several of my prior postings below are just that. But that's not what I'm looking for here. For this post, I was hoping to avoid all the distractions so that someone can either give me a lesson or point me to a resource. Instead, I've been redirected to Rock Auto for a part known to be incompatible, the posting has been hijacked towards getting a booster rebuilt, and my personality has been criticized. Yikes! Tough forum!

Either way, I think I've behaved courteously throughout all of my postings, and people have consistently responded to me promptly, courteously, and helpfully as well. I certainly appreciate everyone's help in the past, present and future.

The reason I started more than one posting, is because each posting has a distinctly different objective and each appears to be a stand-alone topic to me (they don't all have to go together). Some are spitball sessions, some are procedural questions, whether they pertain to my truck or not, and whether they pertain to brake parts or any parts. Either way, I've provided the links to all of them below if you think there is value grouping them together.

from 2010: Cant find a brake booster that fits firewall
Problem: I tried several boosters (e.g. from AutoZone, LMC, Rock Auto), none fit my firewall
Objective: was hoping someone could give me a direct fit part number for the booster
Result: got lots of help but no guaranteed direct fit part number; I eventually did find one that "might be correct"

from 2016: Brake pedal goes to the floor
Problem: brake pedal going to the floor
Objective: Was trying to solicit some ideas what the root cause might be
Result: got some good ideas; still working on the problem one component at a time.

from 2021: Help: Select aftermarket master cylinder
Objective: direct fit part number for the aftermarket master cylinder
Problem: I tried several master cylinders (e.g. from AutoZone, LMC, Rock Auto, various mechanics); none seemed to fix my problem.
Result: got lots of good ideas

from 2021: Need Specs: master cyl and wheel cyl bore sizes (1973 F250 4x4 with PB, 4 drums)
Problem: I tried to lookup the guaranteed direct fit part numbers from Ford in the Motorcraft manual, got stuck
Objective: was hoping someone could give me a direct fit part number
Result: got the direct fit FORD part numbers (yay!)

from 2021: Help reading the Motorcraft Parts Manual
Problem: Had a hard time understanding the annotations
Objective: was hoping someone could interpret the annotations
Result: some of the annotations were explained "star", "r/b" (yay!), one is still a mystery, "m/w"

from 2021: Help - have OEM part number, need current part numbers from any vendor
Problem: Having a hard time converting the FORD part numbers into current part numbers
Objective: hoping someone can show me how to connect the dots between a FORD part number and a part number from a current vendor
Result: this post.

 

Your particular set of problems arose because you are not the original owner and when you began to find out something as critical as your brake system had been replaced with parts that were not originally designrd to work with other parts on the system. I definitely could empathize with your predicament so I having access to the Ford Master parts catalog for your vehicle spent the time digging out the parts numbers that were originally designed for your specific vehicle and brake system. I did this because it was the only way I felt you could accomplish your intended goal of having a safe and effective brake system. Having the part numbers and the supporting posts is what you and anyone else who has or will have issues with the pre disc brake highboy brake system will have a solution that has been built on that approach. Every month on this forum there are several posts that are about all drum brake trucks and still there is no one place where someone can go and address these specific set of problems. You starting several threads undermines the idea of that. I hope you can understand that.

Let me start here :
Why did I reccomend the master cylinder because if you read my post it is the one for 4wd drum brakes.
Then you said This was my advice to you a couple days back that included all the pertinent Ford brake parts numbers. Given that your new approach is "to work forward from the Ford part numbers at this time" then check the Power Booster to verify it is in fact what originally came on the Truck. You might find that it is not and that the reason the master cylinder with the exact part number got returned is because you were trying to mate it to a Power Booster that wasn't original to the Truck which by the way you have as yet to confirm it was original to the truck even though I provided you the part number a couple days ago. My recommendation on the power booster earlier was not to purchase another but to send yours to be rebuilt once you verified it is in fact one that is the part that came with the truck originally.
You were redirected to a part that is compatible with the power booster that you were given the part number to but have yet to verify as the one that is on your truck.
A fellow member was asking about the rebuild process for his power booster because in the post prior it was recommended to you to rebuild your power booster so you could guarantee you would have a power booster that was original to the truck once the part number was verified , period.
Your personality was not being criticized it was only an observation that was and is getting in the way of you getting and receiving a solution to your current Truck issue nothing more. I stand by my observation.

 

Hmm. When I woke up this morning, I didn't expect to get steam rolled and lambasted for asking a simple question about how to connect the dots between the Ford part numbers and the currently available part numbers...

I'm not here to agree or disagree with your motives, approaches, or justifications, and I prefer not to debate mine. The simple fact is that Rock Auto doesn't carry a booster that fits my firewall, I don't have a core to rebuild, and my best bet is to try to cross ref the OEM Ford part number into a part number that I can use to confidently identify an aftermarket part whether new or used.

Regretfully, none of the discussion on this posting is helpful for my objective of learning something about the parts interchange process. I think that its best to end this conversation and I respectfully please ask that you kindly ignore my posts that you find offensive or redundant. I think you can add me to your Ignore List in the User Profile Settings? Not sure if that hides postings, but you can try it.

For the benefit of others: Hopefully someone will chime in with an answer to this post, which isn't specific to my truck but does use my truck as an example, it simply asks for an approach on how to leverage an oem Ford part number to obtain a positive matching part from a current parts vendor. Thanks!

 

My only motive has always been to help you to fix your truck period. You have a core power booster or you wouldn't have been able to determine the master cylinder you purchased wasn't appropriate for the power booster installed in your truck..You blamed the parts warehouses instead after 4 tries. You've a;ready determined that some of your other brake parts were not originally designed for your truck's brake system. My point is until you use the part number I provided you to determine whether the power booster in your truck is in fact the factory installed power booster no cross referencing will help. In fact until you do verify this my guess is your working on your 5th returned master cylinder.

Cross reference this !

 

When I look at the diagram that you attached, it seems you think I have the master cylinder confused with the booster. I don't have them confused. That was a typo that I fixed. I currently have a booster that was sourced from Napa on their third try using the "year/make/model/options" lookup approach because nobody could tell from the ambiguous product descriptions which one was correct. You sent me a link to a Cardone booster at RockAuto that I had tried in the past unsuccessfully; it wouldn't mount on my firewall (the horizontal distance between the 4 studs were too narrow to match the mounting holes).

I can't yet verify that the booster that I have installed on the truck is accurate for the truck even though it "fits". If it is accurate for the truck, it already works and I don't need it rebuilt. If its not accurate for the truck, then I effectively don't have an accurate core to rebuild.

​​​​​​​Yes, and that's why the original purpose of this post is to learn how to translate an original Ford part number... so that I can try to verify my installed booster, my installed master cylinder, and also try to identify candidate parts for sale by any vendor, and be able to do the same for other unrelated parts in the future.

Fortunately, I have been able to verify that all four wheel cylinders installed on the truck have the correct bore. Its entirely possible that the booster and MC that I have are both correct for the truck, but perhaps my distribution block is faulty. I'm trying to rule out having an inaccurate booster and/or master cylinder before I consider replacing the block.

 

Ok now we are getting somewhere. Have you determined that the current installed master cylinder is the same bore size as the one indicated in the Master parts catalog parts number ? and are all brake shoes the size as indicated in the master parts catalog ? Once you've verified that all the parts are those of the originally designed system we can question the brake differential valve block at that time. Only because it will be the hardest to find a suitable replacement. Reason being they are no longer being manufactured and no one is rebuilding them that I know of. Many people have however had success in using an aftermarket brake proportioning valve in place of the original Ford differential valve.
When you have gotten this far and we find that there are still short comings then you can eliminate those with proper adjustment. A question still remains if there are any significant design specification differences with the Power booster you currently have installed and that of the OEM original one. Another question that should be posed and eliminated is "Is the cab original to the truck?" on an almost 50 year old truck anything is possible.
Hang in there and well get to the bottom of this with a working brake system being the goal. Post back with any progress or questions.

 

Yes - the specs for the master cylinder bore, front shoe dimensions, rear shoe dimentions, and all four wheel cylinder bores match the parts manual. The cab appears to be original.

The brakes (drums, wheel cylinders, adjusters, bearings, etc) have all been replaced, adjusted and bled to perfection multiple times by multiple people, including myself. The pushrod was verified, the pushrod gap was verified. All of this has been ruled out in a prior posting where I asked for ideas what else might be causing the symptoms.

On this post, I'd really like to learn how to translate the Ford part numbers so that I can try to verify if my existing booster and master cylinder are either correct or incorrect.

 

Hey, Had a little time to put into this and have the Master Cylinder cross reference solved.



Note: There were two Master cylinders used in 1973 in the F250 4WD
It would appear the only difference was the length of the push rods.
I'm looking into which was which. Can you find out where you fall as
far as the ser. is concerned
1) “Before Ser. R00, 001” = D3TZ 2140-A, M
2) “From Ser. R00,001” = D3TZ 2140- N

The Dorman M83579 master Cylinder is a match!
Cross reference from their product page ..

As you can see in the picture provided the Dorman M83579 includes two different push rod lengths making it suitable to be used as both Ford original equipment parts numbers listed above.

 

Part 2162 is a cap. This cap is intended to fit the 2140 master cylinder. The 2140 master cylinder doesn't appear to be a match for my truck, so I suspect the 2140 is for a front disc rear drum application?

The master cylinder for my truck appears to be part 2004 (as noted in the original posting at the top).

 

The number came from the far right column which lists your master cylinder exactly. Like I said before It's your personality.. I'm done putting another minute into your problems especially your personnel ones. There is a reason you haven't solved this issue in 5 years and it definitely has nothing to do with part #s.

 

Sir,

Thank you. None of the following is intended to offend you, but it probably will: I'm not asking to locate a master cylinder on this post. That was a question that I asked on the prior post. I'm trying to verify if the one I already have is an accurate match. To do that, my question on this post is asking how to translate an obsolete Ford part number into a contemporary part number (using my part number as an example). Nothing more than that. The assistance you're providing here is probably more helpful to those reading my prior post, and probably belongs on that post instead of this one. I'm not trying to solve my problem "your way".

I'm trying to solve my own problem by learning the three processes and putting them together myself. First I asked for spitballs on possible root causes. Then I asked for help to generically obtain part numbers (using my brakes as an example). Now I'm asking how to translate the generic part numbers (using my brakes as an example). Three posts that are helping me learn the processes. I'm hoping to use this generic knowledge to solve future problems that aren't related to my brakes.

I've already asked you to please stop hijacking my thread, to please stop criticizing my personality, and to please ignore me and my postings that you find offensive. But here we are, because you keep coming for me. *sigh.

Thats the best insult you've got? I've been recovering from brain surgery and making memories while raising my three little kids for the past 5 years . I don't expect this truck to get completed for at least another 5, and I don't want to waste another minute sifting through your unwanted noise.

Please - find someone else that you can "help" and leave me alone.