Re: [FWDLK] Master cylinder interchange

["Chris 'Mopar' Lemos" <mopar@xxxxxxxxx>]

 > I was wondering if anyone has ever tried to use a non-power brake
master
 > cylinder in lieu of a power brake master cylinder?  The car is a '61
 > Chrysler Newport with power brakes.  The master cylinder went out on
it
 > and I just need to get the car home.  I have a good '61 Chrysler
 > non-power brake master cylinder at home.  Once I get the car home I
can
 > rebuild the bad master cylinder.  I am trying to prevent getting it
 > towed.  I hate using up my tow card if I don't have to.  Any info.
 > greatly appreciated.   Nick Nichols

I find that the Master Power Brakes catalog has excellent
tech/troubleshooting info.
Heres a few from their online FAQ:
http://www.mpbrakes.com/mpfaq.htm

Q: What is the difference between a power brake master and a manual
brake master?
A: A power brake master will have a larger bore diameter than a manual
master.

Q: Can I use my manual master on a booster?
A: Yes.

Q: Can I use a power brake master without a booster?
A: Usually not. The bore size will be too large giving a hard pedal and
the piston hole will be shallow allowing the push rod to fall out.

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