Original/factory front disc brakes

[Morrie01]

My master brake cylinder is weeping fluid from the top. Took it to the brake shop.
Recommended sanding the top as it is a bit rusty where the seal is. All good.
I was told it is not the original mopar brake cylinder, as per photo, yep no problem, but if I want to replace it this is where it got interesting as we couldnt identify what master brake cylinder to order.
They said we would need to remove it and measure the cylinder dia. Said in all likely hood its a 1" dia. which I can do at some stage if the sanding doesnt work.
Then I was told that all 69 Chargers came from factory with front and rear drums only and no front disc option. Is this true?
I have read tonight that there was a factory front disc option??
I would love to get hold of my build sheet to know what it came out of the factory with but as this is not an option
Is there anyway to tell without the build sheet.
They are saying its probably easier to rebuild the one on there than ordering in something new if the sanding option doesnt work.
Apparently its probably a Chrslyer brake cylinder and matching it correctly to replace it is important for correct brake performance.
Any ideas on part numbers etc greatly appreciated for a replacement.

 

[Tony Tee]

Yes, some came with the bendix 4 piston calipers disc brake set up. I have a 69 R/T and a 69 383 Charger that came with these brakes.
That master cylinder in your picture look correct to me. Do you see any markings on it? If not it might be a reproduction master cyinder.

 

[moparmarks]

Disc brakes were optional starting in 1966.
My first car back in the 70's was a 69 Charger R\T with factory power disc brakes
Like stated your master looks correct. Look for a part number on the bottom side. .

 

[PurpleBeeper]

Your master cylinder was likely replaced at some point & it’s likely the correct replacement master cylinder (it looks correct). That exact master cylinder is available at Autozone, Advance, O’Reilly, NAPA, etc

 

[pnora]

My master brake cylinder is weeping fluid from the top. Took it to the brake shop.
Recommended sanding the top as it is a bit rusty where the seal is. All good.
I was told it is not the original mopar brake cylinder, as per photo, yep no problem, but if I want to replace it this is where it got interesting as we couldnt identify what master brake cylinder to order.
They said we would need to remove it and measure the cylinder dia. Said in all likely hood its a 1" dia. which I can do at some stage if the sanding doesnt work.
Then I was told that all 69 Chargers came from factory with front and rear drums only and no front disc option. Is this true?
I have read tonight that there was a factory front disc option??
I would love to get hold of my build sheet to know what it came out of the factory with but as this is not an option
Is there anyway to tell without the build sheet.
They are saying its probably easier to rebuild the one on there than ordering in something new if the sanding option doesnt work.
Apparently its probably a Chrslyer brake cylinder and matching it correctly to replace it is important for correct brake performance.
Any ideas on part numbers etc greatly appreciated for a replacement.


View attachment 1939222

You need the 2883058.

 

[MWbirdLOVER70]

My master brake cylinder is weeping fluid from the top. Took it to the brake shop.
Recommended sanding the top as it is a bit rusty where the seal is. All good.
I was told it is not the original mopar brake cylinder, as per photo, yep no problem, but if I want to replace it this is where it got interesting as we couldnt identify what master brake cylinder to order.
They said we would need to remove it and measure the cylinder dia. Said in all likely hood its a 1" dia. which I can do at some stage if the sanding doesnt work.
Then I was told that all 69 Chargers came from factory with front and rear drums only and no front disc option. Is this true?
I have read tonight that there was a factory front disc option??
I would love to get hold of my build sheet to know what it came out of the factory with but as this is not an option
Is there anyway to tell without the build sheet.
They are saying its probably easier to rebuild the one on there than ordering in something new if the sanding option doesnt work.
Apparently its probably a Chrslyer brake cylinder and matching it correctly to replace it is important for correct brake performance.
Any ideas on part numbers etc greatly appreciated for a replacement.


View attachment 1939222

Look under the master body with a mirror

 

[mobileparts]

As others have mentioned , that car came through with a Factory Disc Brake option , absolutely, and
That Master Cylinder is a 100 % correct Master Cylinder for the Power Disc Brake system…
That Master Cylinder fits 1967 - 1969 with Power Front
( Four (4) Piston Caliper ) Disc Brakes…..

As illustrated , it is the early ( recalled ) Master Cylinder where the Brake Lines come out Engine side ( too close to the manifold —- heated up —- vapor lock ) , so the later design had the brake lines exiting out the Fender side…..

When you look at the casting number on the bottom side , you will see 2225621 , 2226191 , 2226821 and there were other casting numbers for that master cylinder… It will be ( if it is an original Chrysler Products / MOPAR ) … 222 and four more numbers…..

It IS 1 1/32” Bore…..

 

[4mulas]

You need the 2883058.

View attachment 1939240

My 1969 parts book for Plymouth says the same thing too but my 69 gtx has an original 2226821. I also have a replacement ready to use for it with the same casting number - 2226821

When you google the 2226821 it commonly comes up for the disc brake application for 67-70 and is commonly found around the net as the right one for the job, but when you google the 2883058 I only get the vague description that it is for disk or drum. And not a lot of info otherwise.

 

[mobileparts]

MOPAR actually serviced ( back in the day ) a Master Cylinder Lid and Gasket “kit” —- and I believe that I have exactly One (1) of them remaining !!!
That would be appropriate for ONLY an Original MOPAR Master Cylinder , of course… ( It would fit an aftermarket, yes , but wouldn’t be worth the expenditure $$ ) …..

 

[MWbirdLOVER70]

My master brake cylinder is weeping fluid from the top. Took it to the brake shop.
Recommended sanding the top as it is a bit rusty where the seal is. All good.
I was told it is not the original mopar brake cylinder, as per photo, yep no problem, but if I want to replace it this is where it got interesting as we couldnt identify what master brake cylinder to order.
They said we would need to remove it and measure the cylinder dia. Said in all likely hood its a 1" dia. which I can do at some stage if the sanding doesnt work.
Then I was told that all 69 Chargers came from factory with front and rear drums only and no front disc option. Is this true?
I have read tonight that there was a factory front disc option??
I would love to get hold of my build sheet to know what it came out of the factory with but as this is not an option
Is there anyway to tell without the build sheet.
They are saying its probably easier to rebuild the one on there than ordering in something new if the sanding option doesnt work.
Apparently its probably a Chrslyer brake cylinder and matching it correctly to replace it is important for correct brake performance.
Any ideas on part numbers etc greatly appreciated for a replacement.


View attachment 1939222

@mobileparts should hook you up

 

[Dave6T4]

I can tell by looking at your power brake booster that this car came with optional Bendix 4-piston disc brakes. The booster is a Bendix dual diaphragm unit, used only on disc brake systems on '60's B-bodies. It is identified by its conical shape. Disc brake cars used 10" rear drum brakes.
Disc brake master cylinders are different from drum brake master cylinders, in that they do NOT have a residual valve in the front brake circuit. This allows fluid pressure to fall to zero, to retract piston and pads from rotor.

 

[Morrie01]

Thanks for all the help guys. I had a look underneath the master cylinder with a mirror and can just make out a possible number but nothing really identifiable.
But at least I know the brakes should be factory.
Will give the top surface a sand. At least I can order the correct one if needed....Thanks
Its a bit harder being able to return stuff being down here in New Zealand.

 

[chrger1967]

My master brake cylinder is weeping fluid from the top. Took it to the brake shop.
Recommended sanding the top as it is a bit rusty where the seal is. All good.
I was told it is not the original mopar brake cylinder, as per photo, yep no problem, but if I want to replace it this is where it got interesting as we couldnt identify what master brake cylinder to order.
They said we would need to remove it and measure the cylinder dia. Said in all likely hood its a 1" dia. which I can do at some stage if the sanding doesnt work.
Then I was told that all 69 Chargers came from factory with front and rear drums only and no front disc option. Is this true?
I have read tonight that there was a factory front disc option??
I would love to get hold of my build sheet to know what it came out of the factory with but as this is not an option
Is there anyway to tell without the build sheet.
They are saying its probably easier to rebuild the one on there than ordering in something new if the sanding option doesnt work.
Apparently its probably a Chrslyer brake cylinder and matching it correctly to replace it is important for correct brake performance.
Any ideas on part numbers etc greatly appreciated for a replacement.


View attachment 1939222

I see that M/C has the ports on the engine side. What car us that for? The kit my car came with has a Corvett style M/C and I wouldn't mind changing it in the future.

 

[XS22J8R]

I see that M/C has the ports on the engine side. What car us that for? The kit my car came with has a Corvett style M/C and I wouldn't mind changing it in the future.

‘68-‘70 B Bodies with power disc brakes used that style master cylinder with the outlets exiting towards the engine.
With the exception of hemi cars, the MCs used on those were basically the same, except the ones used on hemis had lines that exited toward the fender.
The casting number for the non hemi MC is 2226821. I am not aware of an aftermarket version of it ever being available for it except for around 20 years ago, when there was one from China being sold for a couple years.
They are getting hard to find.
An aftermarket version with lines on the fender side has been available forever. If you’re not committed to concours correct, that might be the best choice to use as it functions the same. You’d need to redirect or replace the front brake lines though to install it. If your master cylinder has the 2226821 Casting number and you replace it, don’t toss the old one, cores are worth some money.
Amazon.com: Raybestos MC36283 Professional Grade Brake Master Cylinder : Automotive

 

[chrger1967]

‘68-‘70 B Bodies with power disc brakes used that style master cylinder with the outlets exiting towards the engine.
With the exception of hemi cars, the MCs used on those were basically the same except the lines exited toward the fender.
The casting number is 2226821. I am not aware of an aftermarket version of it ever being available for it except for around 20 years ago, when there was one from China being sold for a couple years.
They are getting hard to find.
An aftermarket version with lines on the fender side has been available forever. If you’re not committed to concours correct, that might be the best choice to use as it functions the same. You’d need to redirect or replace the front brake lines though to install it. If your master cylinder has the 2226821 Casting number and you replace it, don’t toss the old one, cores are worth some money.
Amazon.com: Raybestos MC36283 Professional Grade Brake Master Cylinder : Automotive

I've had 2 70 Chargers in my life and both had power disc brakes. But I don't remember what side the ports were on. On my 67 it seems a little tight to have the lines on the fender side. When I change that current M/C I want the correct looking on with the ports on the engine side. I'm going to check Amazon now.

 

[MWbirdLOVER70]

I've had 2 70 Chargers in my life and both had power disc brakes. But I don't remember what side the ports were on. On my 67 it seems a little tight to have the lines on the fender side. When I change that current M/C I want the correct looking on with the ports on the engine side. I'm going to check Amazon now.

Another reason for lines to the fender side was to reduce line temps toward the engine

 

[chrger1967]

‘68-‘70 B Bodies with power disc brakes used that style master cylinder with the outlets exiting towards the engine.
With the exception of hemi cars, the MCs used on those were basically the same except the lines exited toward the fender.
The casting number is 2226821. I am not aware of an aftermarket version of it ever being available for it except for around 20 years ago, when there was one from China being sold for a couple years.
They are getting hard to find.
An aftermarket version with lines on the fender side has been available forever. If you’re not committed to concours correct, that might be the best choice to use as it functions the same. You’d need to redirect or replace the front brake lines though to install it. If your master cylinder has the 2226821 Casting number and you replace it, don’t toss the old one, cores are worth some money.
Amazon.com: Raybestos MC36283 Professional Grade Brake Master Cylinder : Automotive

Guy on eBay is asking $495 for one of those engine side M/C. You ain't bullshittin.

 

[XS22J8R]

Another reason for lines to the fender side was to reduce line temps toward the engine

It’s a mystery to me why Mopar decided to run the lines toward the engine on disc brake B body wedge motor cars in ‘68.
In 67, the same master cylinder with lines toward the fender was used on both wedge and hemi motor cars. Then in 68 they made the change.
Drum brake cars always used the same master cylinder with lines toward the fender from 67-70.
The engineers must have had a reason but I’m at a loss to even guess why.

 

[chrger1967]

It’s a mystery to me why Mopar decided to run the lines toward the engine on disc brake B body wedge motor cars in ‘68.
In 67, the same master cylinder with lines toward the fender was used on both wedge and hemi motor cars. Then in 68 they made the change.
Drum brake cars always used the same master cylinder with lines toward the fender from 67-70.
The engineers must have had a reason but I’m at a loss to even guess why.