ConcoursMustang Forums
1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1966 Mustang => Topic started by: J_Speegle on January 25, 2018, 06:09:18 PM
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We discussed this feature earlier in another thread and the subject came up (related to San Jose production) on another site so wanted to extend the research to or members and include what data we could add to what I'm assembling. Same "rules" as the other surveys
This thread is posted to collect data related to disc brake master cylinders originally used during 1966 production
- This is ONLY for 1966 Mustangs!!
- Participants need to provide the
a) cars VIN (you can leave off the last two numbers if you choose to keep it private) This will provide us with plant and sequential number
b) the projected build date from the original door/warranty tag unless you are offering date from a Shelby of course
c) if you can access it the date code from the master cylinder would be really helpful. A mirror or some play-doy will do the trick.
d) if you have loose master cylinders from the 66 production period those findings with a date code can still be very helpful
e) lastly which style it is.
- Look for features or clues of the part possibly being replaced. Mounting bolts, sound deadener...
I've already gone through some of my pictures building up a list and what appears to be the change over point at one plant but wanted as much data as we can collect to help with the determination.
Again thanks for your time
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Example of the earlier style that required a fitting/adapter
(http://www.concoursmustang.com/forum/gallery/9/6-250118165657.jpeg)
Example of the later style that required no fitting/adapter
(http://www.concoursmustang.com/forum/gallery/9/6-250118165713.jpeg)
(http://www.concoursmustang.com/forum/gallery/9/6-250118170804.jpeg)
Example of the location of the date code. in this case 4-6 ( April of 66)
(http://www.concoursmustang.com/forum/gallery/9/6-250118170747.jpeg)
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From my Metuchen car scheduled build date Oct 14 6T09K12****
Hard to see in the picture but it has the adapter
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Thanks. I guess an side benefit of this discussion may be the two different dating patterns
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Thanks. I guess an side benefit of this discussion may be the two different dating patterns
Even though 205 is July 24, my guess is that someone figured out during production that there is room for 3 characters only which would present a problem when you get to the months with 2 digits. Obviously more samples would help
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Even though 205 is July 24, my guess is that someone figured out during production that there is room for 3 characters only which would present a problem when you get to the months with 2 digits. Obviously more samples would help
Using the Julian calendar style three digits would be all that is needed since you would only need a max of 365/366 . For others the Julian calendar "decoder" is on the last pages of the date coding article in the Library
Found a couple more early (65's like the 205 numbered one here) outside. Need to capture their dates and keep an eye open for a few more at the swap meet tomorrow
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Jeff,
This is off my dad's Shelby. I believe I provided you the full Ford vin once before. Shelby is 1502. Let me know if these are ok or you need something else. Car was restored in the late 1990's.
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66 Metuchen, NJ 6T09C2435XX April 15th. The lid has most likely been cleaned a few to many times.
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66 Metuchen, NJ 6T09C2435XX April 15th. The lid has most likely been cleaned a few to many times.
The lid is typically painted black. It was painted along with the master cylinder body as a unit .
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My 65/66 studies are concentrated at the San Jose plant. All of the historical photos I have seen with cars from that plant show the gold lid painted black (gold on bottom side based on survivor car examination). I can't say with a certainty that the other plants followed suit but given the units used at the other plants were also Bendix master cylinders it is reasonable to assume that they did.
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.............The lid has most likely been cleaned a few to many times.
+1 Its been reported that the master cylinders with lids in place arrived at each of the assembly plants fully painted with plugs in both of the ports to protect the threads and keep contamination out. Plus any small amount of brake fluid used to lube the piston from leaking out
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11/08/65 build date, 6R09K129XXX, 65K miles, 268 date code, has adapters, appeared painted, sent to white post for restoration. Did appear to be gold somewhat on bottom of cap. 2225032 on btm. makers mark and the #4.
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11/08/65 build date, 6R09K129XXX, 65K miles, 268 date code, has adapters, appeared painted, sent to white post for restoration. Did appear to be gold somewhat on bottom of cap. 2225032 on btm. makers mark and the #4.
Thanks - Fits thew pattern
Caps were typically seen plated by zinc dichromate
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My disc brake master cylinder is installed and it's difficult to read the script in a mirror, but there is script in the center and under both cap retainer strap areas. The fluid lines do have an adapter. 6R09K121xxx, 18 Oct 65 build.
Jim
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Thanks - Added to the spreadsheet.
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Which style of MC would be expected on a mid-March San Jose car with serial number range of 175xxx?
Thank you.
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Which style of MC would be expected on a mid-March San Jose car with serial number range of 175xxx?
Style without the adapter fittings
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Hello,
The previous owner replaced the original Bendix manual disc master cylinder with an OEM version on my 66 GT Coupe. I purchased an original that I'm planning on rebuilding. The finish for the original is natural cast Iron with a natural what appears to be a copper finish. My VIN is 6T07A101612 built on August 30th 1965 for the 66 model year at the Metuchen plant. The cylinder I purchased requires line adapters which I believe is correct for an early model 66. The question I have is do I keep the finish natural cast or should I paint it Semi-Gloss Black like the original Kelsey Hayes Proportioning Valve that's installed. The Distribution Block was also painted semi-gloss black but I removed the paint (should I have kept it semi-gloss black?). Does anyone know where I can get a copy of a diagram of the Bendix manual disc master cylinder?
Thanks
Rich D.
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Hello,
The previous owner replaced the original Bendix manual disc master cylinder with an OEM version on my 66 GT Coupe. I purchased an original that I'm planning on rebuilding. The finish for the original is natural cast Iron with a natural what appears to be a copper finish. My VIN is 6T07A101612 built on August 30th 1965 for the 66 model year at the Metuchen plant. The cylinder I purchased requires line adapters which I believe is correct for an early model 66. The question I have is do I keep the finish natural cast or should I paint it Semi-Gloss Black like the original Kelsey Hayes Proportioning Valve that's installed. The Distribution Block was also painted semi-gloss black but I removed the paint (should I have kept it semi-gloss black?). Does anyone know where I can get a copy of a diagram of the Bendix manual disc master cylinder?
Thanks
Rich D.
Only paint the master semi gloss black if you want it to look a typical assemblyline. The proportioning valve was painted semi gloss black on the GT350?s to identify them because they were adjusted for the 2 1/2 rear brake shoes.
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thanks for your quick reply :)
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What about the cap? Should I also paint it semi-gloss black to match the Cylinder?
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What about the cap? Should I also paint it semi-gloss black to match the Cylinder?
The master cylinder with cap and retainers were painted as a unit semi-gloss black. There were caps/plugs installed at each brake line port leaving a shadow of bare steel ones the plugs were removed and the lines attached. Shadow was not as large as the whole machined surface there
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The master cylinder with cap and retainers were painted as a unit semi-gloss black. There were caps/plugs installed at each brake line port leaving a shadow of bare steel ones the plugs were removed and the lines attached. Shadow was not as large as the whole machined surface there
To add about the plug witness lines Jeff mentioned , the fitting hole had a unpainted machined metal witness line circle's approximately the size of a a dime. That is a easy guide in case you do not have access to original rubber plugs. to use to make the circle.
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Hello,
The previous owner replaced the original Bendix manual disc master cylinder with an OEM version on my 66 GT Coupe. I purchased an original that I'm planning on rebuilding. The finish for the original is natural cast Iron with a natural what appears to be a copper finish. My VIN is 6T07A101612 built on August 30th 1965 for the 66 model year at the Metuchen plant. The cylinder I purchased requires line adapters which I believe is correct for an early model 66.The question I have is do I keep the finish natural cast or should I paint it Semi-Gloss Black like the original Kelsey Hayes Proportioning Valve that's installed. The Distribution Block was also painted semi-gloss black but I removed the paint (should I have kept it semi-gloss black?). Does anyone know where I can get a copy of a diagram of the Bendix manual disc master cylinder?
Thanks
Rich D.
After rereading the post I thought it best to clarify. The proportioning valve was semi gloss black on a GT350 for reasons I mentioned before. For those with regular Mustang the proportioning valve was typically painted a battleship gray. The distribution block was bare unpainted brass with a silver zinc attachment bracket.