brakes and lights

Discussion in 'Technical' started by mavman, Dec 25, 2002.

  1. mavman

    mavman Member

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    I found my brake problem, now I need to know if '76 maverick (disc brake) spindles are the same as '76 Granada spindles? I've been running the smaller rotors from a power brake '76 on my '74, but the pedal effort is outrageous! I remembered that the granadas had 11" rotors from the factory, and I found one at the junkyard...but dont know if I need the spindles or just the caliper brackets and rotors. Also, I've got a problem with the running lights intermittently going off by themselves. I can turn on all the lights, they will stay on for 5 minutes or so, then go off for about 15 seconds, then come back on. Sometimes if I wiggle the headlight switch in the dash, they will come back on sooner, sometimes they wont. Also, stepping on the brake pedal will cause them to go out more often and stay off longer. I cannot for the life of me figure this out....replaced headlight switches many times, checked all the wiring and grounds, etc. I've got to be missing something??? Makes it a PITA to drive at night, especially when the local law is following me! Any ideas?
     
  2. K. Merring

    K. Merring Regular

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    Brakes. I don't understand why your asking about disc size. On both Mav. and Granada/Monarch and Lincoln they are all 11". Mustang II are smaller and don't think they fit the Mav spindle cprrectly.
    The master cylinder for disc brake application has a smaller bore to supply more pressure. If no power assist, the effort still will be high.
    Lighting. There is a circuit breaker on the light switch that is the protection feed for the lights. It is sensing to much current and trips then resets. Could just need replacement or if you changed head lights to the Haligen type or added more lights, this could be a problem.
     
  3. Mavericknutt

    Mavericknutt member

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    actually the mustang II spindle dimentions and the mav/granada spindle dimentions are the same I know this cause I put a factory MII under my car and have mav/granada rotors,bearings,and seals.
     
  4. K. Merring

    K. Merring Regular

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    Good point! I never had a need to look at that kind of installation. If one looks at the part number specified for Mav/Comet/Granada/Monarch, there all the same number for the 11" rotor and calipers.
     
  5. mavman

    mavman Member

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    they ARE different between power and manual. The power brakes are 10" rotors, the manuals are 11". I've got rotors from a power brake equipped car. that's why it takes so much pedal effort to stop this thing. Everything is new, lines, valve, master cylinder, calipers, wheel cylinders, drums, flexhoses, everything. Still doesnt lock up the wheels on loose gravel. Going to the junkyard in a few hours!
     
  6. K. Merring

    K. Merring Regular

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    Check page 228 of the Haynes book. You will see all 11.03". The drum brakes are 10". Check the part numbers for all the cars that use the same disc. There the same number, and all 11".
     
  7. merc1mack

    merc1mack merc1mack

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    brakes

    I am having vibration above 55 mph in my Merc1. Tomorrow my brake man is planning to replace the 4 brake drums on the Merc1. Should I just convert to disc brakes? What is you all's experience with this subject? I also wonder if I should check the size of the brake cylinders. The brake cylinders have been replaced as have all the flexible lines. Friday I had new sway bay ends installed. Plus I had new tie rods installed. The steering is much better. Just the brakes are a pain. HELP! Do I need to replace the drums to stop the vibration? Thanks for all your help.
     
  8. K. Merring

    K. Merring Regular

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    Make sure the wheels are in balance. If the drums are out of round or the center is bents, they could cause a problem at some speed.
    If your satified with the present braking and it's power, I would leave it as is.
    To upgrade, you need to replace the spindles, get rotors, calipers. Then there is a proportiong valve that need to be placed in the system. This is because there will be a difference between the front and the rear braking pressure application. With out it and proper operation the rear brakes would lock up first. You don't want that to happen so the job has to be worked out to that end.
    Also depending on if you have power assist, the pedal pressure needed to stop the car won't get any better except for the pads that may be used in the calipers.
    The master cylinder should also be replaced with the one for disc/drum application.
    When all done then front end alignment needs to be done.
     

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