1950 Brakes
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1950 Brakes
I'm learning about brakes. What was on the truck was the original setup with two lines going forward and one going to the T-fitting in the rear, all directly attached to the master cylinder. Now I've got a '67 to'72 Mustang dual master cylinder, and NAPA tells me I need a proportioning valve. Can I just use a T-fitting on both the front and rear or do I need a proportioning valve? If I need one ,where do you buy one?
Senior User
Joined: Aug 2000
Posts: 288
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From: Agua Dulce, So. Calif.
1950 Brakes
>I'm learning about brakes. What was
>on the truck was the
>original setup with two lines
>going forward and one going
>to the T-fitting in the
>rear, all directly attached to
>the master cylinder. Now
>I've got a '67 to'72
>Mustang dual master cylinder, and
>NAPA tells me I need
>a proportioning valve. Can
>I just use a T-fitting
>on both the front and
>rear or do I need
>a proportioning valve? If
>I need one ,where do
>you buy one?
With a disc drum combination I now for sure you will need a proportioning valve along with a 2 & 10 psi residual valve. I believe all you will need is to send a brake line from forward most resevoir to the rear and the other to the front. I am not certain about the residual valve because I think they come with the master cyl. I to will be intrested on the comments.
>on the truck was the
>original setup with two lines
>going forward and one going
>to the T-fitting in the
>rear, all directly attached to
>the master cylinder. Now
>I've got a '67 to'72
>Mustang dual master cylinder, and
>NAPA tells me I need
>a proportioning valve. Can
>I just use a T-fitting
>on both the front and
>rear or do I need
>a proportioning valve? If
>I need one ,where do
>you buy one?
With a disc drum combination I now for sure you will need a proportioning valve along with a 2 & 10 psi residual valve. I believe all you will need is to send a brake line from forward most resevoir to the rear and the other to the front. I am not certain about the residual valve because I think they come with the master cyl. I to will be intrested on the comments.
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Joined: Jan 2001
Posts: 56,979
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From: Virginia
1950 Brakes
Hopefully the master cylinder you got was for a mustang with
drums front and rear. If it is, it will have the correct
residual valves built into the master cylinder. The residual
valve keeps fluid in the lines and keeps the seal cups in the
wheel cylinders pushed out against the bore of the wheel cylinder. You don't have to use a proportioning valve-it's
just a nice feature the older vehicles didn't have. It delays
the rear brakes applying during a panic stop to keep the rear
wheels from locking up. Some of them also had a plunger that
would shift if you lost pressure to the front or rear and this
would turn a "brake" light on in the car. You could just get
the correct fittings and hook the system up directly to the
master cylinder.
drums front and rear. If it is, it will have the correct
residual valves built into the master cylinder. The residual
valve keeps fluid in the lines and keeps the seal cups in the
wheel cylinders pushed out against the bore of the wheel cylinder. You don't have to use a proportioning valve-it's
just a nice feature the older vehicles didn't have. It delays
the rear brakes applying during a panic stop to keep the rear
wheels from locking up. Some of them also had a plunger that
would shift if you lost pressure to the front or rear and this
would turn a "brake" light on in the car. You could just get
the correct fittings and hook the system up directly to the
master cylinder.
Senior User
Joined: Aug 2000
Posts: 288
Likes: 0
From: Agua Dulce, So. Calif.
1950 Brakes
>Hopefully the master cylinder you got
>was for a mustang with
>
>drums front and rear. If
>it is, it will have
>the correct
>residual valves built into the master
>cylinder. The residual
>valve keeps fluid in the lines
>and keeps the seal cups
>in the
>wheel cylinders pushed out against the
>bore of the wheel cylinder.
> You don't have to
>use a proportioning valve-it's
>just a nice feature the older
>vehicles didn't have. It
>delays
>the rear brakes applying during a
>panic stop to keep the
>rear
>wheels from locking up. Some
>of them also had a
>plunger that
>would shift if you lost pressure
>to the front or rear
>and this
>would turn a "brake" light on
>in the car. You
>could just get
>the correct fittings and hook the
>system up directly to the
>
>master cylinder.
The residual valve can be bought seperatley for 14 dollars at Speedway.
>was for a mustang with
>
>drums front and rear. If
>it is, it will have
>the correct
>residual valves built into the master
>cylinder. The residual
>valve keeps fluid in the lines
>and keeps the seal cups
>in the
>wheel cylinders pushed out against the
>bore of the wheel cylinder.
> You don't have to
>use a proportioning valve-it's
>just a nice feature the older
>vehicles didn't have. It
>delays
>the rear brakes applying during a
>panic stop to keep the
>rear
>wheels from locking up. Some
>of them also had a
>plunger that
>would shift if you lost pressure
>to the front or rear
>and this
>would turn a "brake" light on
>in the car. You
>could just get
>the correct fittings and hook the
>system up directly to the
>
>master cylinder.
The residual valve can be bought seperatley for 14 dollars at Speedway.
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