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Brakes still spongy

Discussion in 'Early CJ5 and CJ6 Tech' started by olywrestle, Mar 11, 2005.

  1. Mar 11, 2005
    olywrestle

    olywrestle New Member

    SLC, Utah
    Joined:
    Sep 25, 2002
    Messages:
    29
    Okay I have a 71 Master Cylinder. Scout 44's with disks up front. I removed the 10ld residual on the front port and added an inline 2lb, and added a proportioing valve to the rears. I cannot get them to get really firm and solid, they still feel spongy. The master cylinder is relatively new. Any ideas? am I missing something? Do I just need to bleed more?
     
    olywrestle, Mar 11, 2005
    #1
  2. Mar 11, 2005
    linckeil

    linckeil Member

    Danbury CT
    Joined:
    Aug 19, 2004
    Messages:
    492
    yeah, definitly bleed more if you are unsure all the air is out of the system. just make sure you keep the master cylinder full while bleeding. air in the lines is usually the reason for the problem you describe. make sure there are no leaks anywhere in the system.
     
    linckeil, Mar 11, 2005
    #2
  3. Mar 11, 2005
    olywrestle

    olywrestle New Member

    SLC, Utah
    Joined:
    Sep 25, 2002
    Messages:
    29
    pretty much all new lines, and components, wheell cylinders, calipers, etc... I guess I will just bleed and bleeed
     
    olywrestle, Mar 11, 2005
    #3
  4. Mar 11, 2005
    mb82

    mb82 I feel great!

    Charlottesville Va
    Joined:
    Mar 17, 2003
    Messages:
    2,706
    yes bleed bleed bleed. i changed out a buddies brake lines for longer ones on his TJ once. gees i could not believe how long i had to bleed those suckers for.
     
    mb82, Mar 11, 2005
    #4
  5. Mar 11, 2005
    Old Bill

    Old Bill Aggressively passive....

    Really Southern...
    Joined:
    Nov 12, 2004
    Messages:
    822
    Old Bill, Mar 11, 2005
    #5
  6. Mar 11, 2005
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
    Messages:
    4,275
    Just checking, did you bench-bleed the new master cylinder before installing it? You will NEVER get a good pedal feel if you skipped this important step when installing a new MC. Also, are the disc calipers installed on the correct sides of the vehicle? The bleeder ports have to be pointing up toward the sky in order to work. If you accidentally swap the calipers during reassembly, they will be installed so that the bleeders are on the bottom and they will NEVER get all the air out.
     
    w3srl, Mar 11, 2005
    #6
  7. Mar 11, 2005
    olywrestle

    olywrestle New Member

    SLC, Utah
    Joined:
    Sep 25, 2002
    Messages:
    29
    yes bench bled MC. Will check Claps, but I am pretty I got them right
     
    olywrestle, Mar 11, 2005
    #7
  8. Mar 11, 2005
    scott milliner

    scott milliner Master Fabricator

    Seattle Wa.
    Joined:
    Dec 17, 2002
    Messages:
    2,362
    Another trick is too bleed the lines at the master cylinder. It's done just like the wheel cylinder but you loosen the lines at the master. This makes the line bleeding process mush faster.
     
    scott milliner, Mar 11, 2005
    #8
  9. Mar 11, 2005
    Ducks-Bass-n-Jeeps

    Ducks-Bass-n-Jeeps A Parade of One

    Brentwood, Tennessee
    Joined:
    Aug 11, 2003
    Messages:
    120
    Ditto

    Keep bleeding!

    I like to get a clear hose with diameter that fits tightly over the bleed screw. Put the hose over the opened bleed screw and in a jar with a little fluid in it so when you pump it, it does not suck air back in when you release the pedal. Keep pumping until there are not air bubbles.

    It is a good method especially when you are by yourself.
     
    Ducks-Bass-n-Jeeps, Mar 11, 2005
    #9
  10. Mar 11, 2005
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
    Joined:
    Feb 2, 2003
    Messages:
    747
    Scott: When I first heard the term "bench bleed" on this board, I had no idea what anyone was talking about. Took a while to figure it out. The same thing I had been doing for 30+ years, but, doing it like you do! :D
     
    James P. Enderwies, Mar 11, 2005
    #10
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