1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Do I need a proportioning/combination valve on my 1960 CJ5?

Discussion in 'Early CJ5 and CJ6 Tech' started by Tater76, Nov 12, 2014.

  1. Tater76

    Tater76 New Member

    Just like the title says, is it necessary to install a proportioning valve in my system? I have upgraded to the dual master cylinder, new lines, 11" brake upgrade. If I need one does anyone have a part number and supplier?

    Also, the pressure switch...... is it's job to activate the brake lights? or backup lights? Does it need to be mounted on the proportioning valve? or 4 way tee? Sorry if that's a stupid question, I'm a brake noob.

    Any help is very much appreciated, as I need to finish the brakes so I can install the new drivetrain :D
     
    Tater76, Nov 12, 2014
    #1
  2. supertrooper

    supertrooper Member

    The pressure switch is for the brake lights. The back up switch should be mounted to the shift tower on the transmission. You can get a universal proportioning valve and add it inline with the rear brake line.
     
    supertrooper, Nov 12, 2014
    #2
  3. Tater76

    Tater76 New Member

    Awesome! Thanks for the info, but what about the valves that regulate the front and back? I think they are called combination valves? Are they necessary? Or can I get away with just regulating the back lines?
     
    Tater76, Nov 12, 2014
    #3
  4. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    It depends on which wheel cylinders you used, if the same diameter front & back then yes you need a proportioning valve. if you used a smaller diameter cylinder in the back then you shouldn't need the valve. IIRC without the valves fronts should be 1" & rears 15/16ths or 7/8 th's diameter.

    H.
     
    Howard Eisenhauer, Nov 12, 2014
    #4
  5. jeep2003

    jeep2003 Well-Known Member

    you can put the pressure switch anywhere you want. mine is in the rear line and it works fine. I would build it without a proportioning valve. if you really feel the back brakes pulling and locking up before the front then install it. but i have never had an issue when removing them
     
    jeep2003, Nov 14, 2014
    #5
  6. Tater76

    Tater76 New Member

    Thanks for the reply. I think I will try it without because I am having a heck of a time finding a universal one. All I have to go off of is grainy pics found off of the internet. Most of them have the four ports for front and back lines. Nobody seems to have a part number or definite idea around my neck of the woods. I am starting from scratch, so I just want to do it right once. I will try to post pics of everything so maybe it will help somebody else in the future.
     
    Tater76, Nov 15, 2014
    #6