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Master cylinder

Discussion in 'Intermediate CJ-5/6/7/8' started by quimbypond, Aug 20, 2013.

  1. quimbypond

    quimbypond Member

    Yet another spin-off.
    I picked up a Yj mc/booster/prop valve. Right now I have 11" drums all the way around. What combination of MC and prop valve should I use. Will the original prop valve with the new MC work?
    What happens when I swap in discs in the front? Should I then go to the Yj prop valve? Thanks
     
  2. johneyboy03

    johneyboy03 The green beast

    I run a yj booster/master, with his prop valve , i was having disk brake from a cj7 1977 and 11" drum at the rear, everything was working fine for me.
     
  3. joshua70x7

    joshua70x7 Jeepoholic

    I just bought a 89 YJ master cylinder/booster/prop valve for my 1973 CJ. I am gathering the rest of the stuff for the install so I'll be checking this thread as I go forward. What I've been reading on the net you can use either prop valve if you have drums all around - not sure about if you are adding discs.
    My question is - if brake tubing has to be chnged, is it OK to mix tube sizes or should you keep it all the same? My CJ has 1/4 lines I believe.
     
  4. quimbypond

    quimbypond Member

    I havent read anything about changing lines, other than to accomodate the fittings on the engine side of the yj mc rather than the fender side fittings of the cj mc. I believe my lines are1/4", as well. I'll link to the info I have tonight.
     
  5. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

  6. sterlclan

    sterlclan Member 2024 Sponsor 2022 Sponsor

    id run the factory prop valve till the disk swap then change the valve.
     
  7. quimbypond

    quimbypond Member

    That's what I was thinking.
     
  8. joshua70x7

    joshua70x7 Jeepoholic

  9. quimbypond

    quimbypond Member

    The hose to intake on my junk yard pull was cut.......Is there a one-way pressure valve off from the intake, or just the one in the grommet of the booster?? Thanks
     
  10. joshua70x7

    joshua70x7 Jeepoholic

    Just the one on the booster on mine..