Topic: 1965 Mustang Disc Master Cylinder

[65fastbk]

Hi,

Im trying to determine if my MC is original or correct for my car.  Its a 1965 San Jose built car (July).  Are there any markings to identify it?  Im trying to determine on wether to rebuild it or by an aftermarket one.

Thanks!!

[Bob Gaines]

The main distinguishing aspect is the fact that it has the brass adapter which indicates it is most likely original. The Master cylinders starting sometime in early 66 production changed over to having a flare fitting made into the master so as to do away with the adapter. That type of early masters are hard to find. because it was just one year and all replacement made after that were the 66 style. It is highly likely that it has not been replaced for that reason.

[65fastbk]

Thanks Bob, is it worth rebuilding it or just getting an aftermarket replacement and saving the original?  Do you know of any good rebuilders.

Thanks again!!

[Bob Gaines]

Worth rebuilding because of historical significance  but much cheaper to buy after market .Sorry don't have a recommend on a rebuilder.

[Brant]

The current new disc brake master cylinders (at least the ones we have) have the tube seats built in like the later '66 units, so if you want to retain this detail, you may want to have that one rebuilt.

[65fastbk]

Ah I see, thanks guys...decisions, decisions:) Oh last question...what color should it be, all black including the cover?

[Bob Gaines]

Ah I see, thanks guys...decisions, decisions:) Oh last question...what color should it be, all black including the cover?

Yes,most typical.

[jwc66k]

You might try a local brake repair facility and see what they offer. Do some net searches for endorsements, both kinds. I've used this shop in San Jose, CA a couple of times with good results. 
http://pwrbrake.com/Locations.html
You need to tell any brake shop that you want a rebuild, not a replacement.
Jim

[65fastbk]

Thanks Jim,

I actually had some calipers rebuilt there for a different car, but haven't put them on yet....So you were happy with your results?

Thanks!

You might try a local brake repair facility and see what they offer. Do some net searches for endorsements, both kinds. I've used this shop in San Jose, CA a couple of times with good results. 
http://pwrbrake.com/Locations.html
You need to tell any brake shop that you want a rebuild, not a replacement.
Jim

[rodster]

The main distinguishing aspect is the fact that it has the brass adapter which indicates it is most likely original. The Master cylinders starting sometime in early 66 production changed over to having a flare fitting made into the master so as to do away with the adapter. That type of early masters are hard to find. because it was just one year and all replacement made after that were the 66 style. It is highly likely that it has not been replaced for that reason.

Great info!      Thanks.

Looks like my 65 still has an original MC.

[65fastbk]

I just pulled it off and the numbers on the bottom reads:

618967  and next to it the Bendix "B"

Date code is weird, looks like 270 or 273? Could this be correct for a 65 mustang?  How many years did they make them with the brass flares attached?

[Bob Gaines]

I just pulled it off and the numbers on the bottom reads:

618967  and next to it the Bendix "B"

Date code is weird, looks like 270 or 273? Could this be correct for a 65 mustang?  How many years did they make them with the brass flares attached?

As mentioned in reply #1 changed over in early part of 66 production. No need to keep producing since the new style with the flare seat made into the Master would also fit the 65 model . There is enough flex in the lines to bridge the distance the brass adapter took up.

[Anghelrestorations]

I can do the rebuild on the master cylinder at my shop if you need help.  Typically we do the later dual reservoir style but can do this as well.  Contact me offline if interested.

The date code system that Bendix used was based on the Julian calendar....so from 001 to 365. 

Nice to see an original like this.

[rodster]

The numbers are different and I don't see the B for Bendix. What do I have here?

[Bob Gaines]

The numbers are different and I don't see the B for Bendix. What do I have here?

The Bendix "B" trademark is visible in the picture between the 7 digit series and the 5. So you have a early Bendix master of the 65 early 66 variety needing the brass adapter .