brake caliper tool

  1. zeppelin builder

    zeppelin builder Member

    Messages:
    1,500
    Location:
    peoples republic of scotland
    while overhauling my old Audi brake calipers i made this wee tool out of a motorbike tube valve and a brake pipe fitting by silver soldering them, 20200423_123218.jpg 20200423_111501(0).jpg brass and steel together, it makes removing the pistons a doddle with 150 psi air pressure
     
    8ob, Wany, Hopefuldave and 2 others like this.
  2. Ashley Burton

    Ashley Burton Member

    Messages:
    4,489
    Location:
    Northamptonhire
    Just be careful with shooting pistons!
     
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  3. zeppelin builder

    zeppelin builder Member

    Messages:
    1,500
    Location:
    peoples republic of scotland
    risk assement done , toolbox talk to all personnel in work party ,permit signed and understood
     
  4. frank horton

    frank horton V twins are great but 4"s rule.........

    Messages:
    2,068
    Location:
    Soon 2 B Crete
    the calipers are really cheap now ....just buy new......
     
  5. Agroshield Member

    Messages:
    1,047
    Grease nipple can be substituted for Schraeder valve if air is not available.
     
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  6. Ashley Burton

    Ashley Burton Member

    Messages:
    4,489
    Location:
    Northamptonhire
    @frank horton Alot of the common models have become pretty cheap

    I found anything less common always held their price

    Supply & Demand I suppose

    Most of the chinese calipers are cheap, But I do question the quality
     
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  7. Wallace

    Wallace Member

    Messages:
    7,279
    Location:
    Staines, Middlesex, England.
    Is that caliper off the Quattro?
     
  8. The_Yellow_Ardvark

    The_Yellow_Ardvark perkele

    Messages:
    13,340
    Location:
    England
    I used a grease gun, nipple to pump out pistons in the past.

    It was slow, but it worked. Only once did one let fly.

    I think it was on a Marina estate car, bloody thing.

    Works on S1 slave cylinders as well.
     
    slim_boy_fat likes this.
  9. zeppelin builder

    zeppelin builder Member

    Messages:
    1,500
    Location:
    peoples republic of scotland
    yes ,doin a bit of mechanical work , so far this week , rebuild rear calipers , skim discs
    they were new 10 years ago so plenty thick
    replaced all the brake pipes with cunifer /copper on the tighter bits , new fuel pump and filter replace both fuel lines with 8 mm cuni
    today i intend to do a bit of removing any rust on the sub frame and coating with
    no i wanted to see the workings inside
    as always
     
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  10. Craig-SM

    Craig-SM Member

    Messages:
    910
    Location:
    Leeds
    I’ve seen pictures posted of broken calipers, usually at the mounting points. I’d rather recondition originals than by cheap calipers. It usually works out more cost effective anyway and no problems once fitted such as pistons rusting up way too quickly. It only takes around 30-60 mins per caliper to do depending on if the piston is stuck.
     
    Shox Dr, fizzy, Hopefuldave and 2 others like this.
  11. zeppelin builder

    zeppelin builder Member

    Messages:
    1,500
    Location:
    peoples republic of scotland
    yes going through it , new brake lines calipers rebuilt , new fuel lines , discs skimmed , new fuel pump and filter ,
    going to wax it up next , start on front next week same thing
    cast iron turning is easy but incredibly messy , discs were new 10 years ago so just a light cut to clean them still plenty thick
     
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    • 20200422_161653.jpg
    8ob, eddie49, tom2207 and 2 others like this.
  12. stuvy

    stuvy Member

    The cars I was recently working on are from the 50’s some hadn’t been driven in 50 years

    always used an airline and gently got the pistons out that way

    I have watched the apprentice fire them into the ceiling before
     
  13. armalites Member

    Messages:
    5,225
    Herefordshire
    I piece of wood always is advisable, they really do come out with a bang.

    Those VAG calipers with the handbrake mech are prone to seizing, make sure you clean that mech up. There used to be a return spring from a Ford Granada caliper we fitted to Golfs and Corrados back in the day as it was stronger.

    @zeppelin builder I was always intrigued how the handbrake mech worked too. It's quite a clever but simple system the way it ratchets, we fitted the Granada springs because if it didn't return properly the ratchet didn't reset.
     
    tom2207, Wany, Shox Dr and 1 other person like this.
  14. I showed my young apprentice in the kart shop how to remove the caliper pistons. some of our calipers have six pistons so it can get a bit inventive to get them all out. He was a bit blase about using the airline on them so I showed him just how powerful an airline can be. He now covers the caliper up with 2 or 3 microfibre towels and looks away. A piston going through two sides of a partition wall brought him down to earth. I followed that with a Youtube video of an exploding air receiver.
     
    Turbo, Wany, arther dailey and 2 others like this.
  15. Stupoty Member

    Messages:
    81
    Location:
    London
    I thought the way to remove the pistons was accidentally pressing the brake peddle any time the calipers are not mounted :)

    Maybe it's just me ?
     
    Morrisman, Alan Reynolds, zx9 and 2 others like this.
  16. stuvy

    stuvy Member

    you can do that but if your on the bench an airline is always to hand as @Alan Reynolds mentioned a cloth to stop it firing into next week
     
  17. a111r Member

    Messages:
    630
    Location:
    London
    Think the last one I did, I rigged up a push bike track pump.
     
  18. armalites Member

    Messages:
    5,225
    Herefordshire
    Sometime air just won't do it, with an airline you could be up to 150psi, with a grease gun you can be in thousands of PSI
     
  19. slim_boy_fat

    slim_boy_fat Forum Supporter

    Just for those of us without the knowledge/experience/confidence for brakes work [caliper overhauls etc], I give you.........http://biggred.co.uk/ I've no personal experience of them, but have read good reports elsewhere.

    Not a problem if you're prepared......:whistle: :D


    [​IMG]
     
  20. Craig-SM

    Craig-SM Member

    Messages:
    910
    Location:
    Leeds
    AFA5F24D-4779-47C9-9E8A-CA96F74676FE.jpeg These didn’t want to come out with air so had to resort to pulling them with tools.
    You may notice the end of the piston on the left is bashed. This was the previous owner who taken it to a garage and they charged him for reconditioning the rear calipers that were binding. Reconditioning must mean smashing the hell out of it until the piston goes back in the caliper.
     
    8ob, eddie49, zx9 and 2 others like this.
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