brake caliper tool

  1. zeppelin builder

    zeppelin builder Member

    Messages:
    1,500
    Location:
    peoples republic of scotland
    i think that a better solution would be screwed in or similar stainless liners to match the pistons, im sure someone was doing this for Dunlop calipers used on classic jaguars
     
    stuvy likes this.
  2. tom2207 Member

    Messages:
    2,033
    Location:
    uk northern ireland
    Wish Id known that a few years ago ,, the hand brake on my Corrado only ever used to work for a week ,, that was the week after mot , then it seized up for another 11 months , was quite common to come back and find your car ten feet away from where you parked it , so it was always in gear , and wheels pointing at the kerb .

    Another vote for Big Red , ive an A6 allroad , with Lucas brakes , aka the big brakes , and they supplied replacement seals and pistons , all great quality and perfect fit ,and at a really great price too .
     
  3. eddie49 Member

    Yes, Jag Mk II calipers, the stainless liners are Loctited in.
     
    stuvy likes this.
  4. JohnH Member

    Messages:
    107
    UK M25 J6
    Maybe, but in this example 6000psi wouldnt remove the pistons, so 200 ft/lbs wont do much, and yes I do have genuine ATE pliers.

    It maybe a solution after the initial disassembly problem has taken place, but I truly believe the simple and cheap solution is Red Rubber Grease used during assembly. These calipers were originally supplied by a reputable company, but like all suppliers they use brake fluid as the lubricant during assembly, which may be okay for a car used on a daily basis, but for those used infrequently it causes problems.

    These are one of the calipers,

    [​IMG]

    It looks good inside the cylinder but beyond the seal, not so good.

    Assembly using Red Rubber Grease

    [​IMG]
     
    8ob, slim_boy_fat, zx9 and 2 others like this.
  5. 500e

    500e Always buy fire insurance a flood is hard to start

    Messages:
    4,813
    Location:
    SWest UK
    Can remember struggling with those early Mk Jag & AH Calipers
     
  6. armalites Member

    Messages:
    5,225
    Herefordshire
    They must have been in there good and proper and I wonder if the fact the pistons were stainless made a difference because the corrosion was focused in one place. I've only had to use grease once and it was on a set of Defender 110 calipers that looked like they were found on a beach.

    I've always used silicon grease or red rubber grease on the pistons,bores and seals. Using brake fluid is so messy..

    I find rebuilding calipers really enjoyable but I guess that would wear off pretty quick if you worked at Big Red or somewhere like that :laughing:
     
    slim_boy_fat likes this.
  7. JohnH Member

    Messages:
    107
    UK M25 J6
    The calipers were bought as a pair, in 2001, but I only discovered that one had Stainless pistons and the other iron after I disassembled them in 2015. The "iron" caliper came apart without any problems. The rebuilt pair are currently doing service on a road rally car in Scotland. No complaints so far!

    Like you, I really enjoy refurbing calipers. I guess we both have issues ;)
     
    slim_boy_fat likes this.
  8. RichardM Member

    Do they have what look like location pegs on the pistons?

    Have you found a paint which isn't effected by brake fluid?
     
  9. tom2207 Member

    Messages:
    2,033
    Location:
    uk northern ireland
    Is it maybe the fluid inlet port your seeing .
     
  10. 8ob

    8ob Forum Supporter

    Messages:
    6,120
    Location:
    moscow on thames
    Nice work John.

    Bob
     
  11. RichardM Member

    Pistons.jpg

    No it's not in the caliper body, but on the piston as above. Just never seen them before on bikes or cars I've done.
     
  12. tom2207 Member

    Messages:
    2,033
    Location:
    uk northern ireland
    Ah , sorry missed that ,, nope , but its a good idea , be better with two , then you could put a bar across and give them a wiggle for taking them out ,, range rover ones i just weld a bar across the pistons , granted they are not getting used again but some times its enough to get them out ,
     
  13. RichardM Member

    I use a rawlbolt with a split adapter, (have lathe) put the split adapter into the piston, rawlbolt in the middle, do it up, rawlbolt expands adapter making it relatively easy to pull out.
     
    tom2207 likes this.
  14. tom2207 Member

    Messages:
    2,033
    Location:
    uk northern ireland
    like a bearing puller , great idea , Ill knock something up and give it a go ,, 2ft bar is very common on range rovers , beats me how they get so stuck.
     
    slim_boy_fat likes this.
  15. RichardM Member

    Tight persons version of one of these ;)
     
    • Brake Piston Removal.png
  16. 500e

    500e Always buy fire insurance a flood is hard to start

    Messages:
    4,813
    Location:
    SWest UK
    Never liked silicon fluid
     
  17. northwest

    northwest Member

    Messages:
    1,714
    Location:
    Manchester UK
    Keeping on topic (sort of) went to my pal's yesterday to replace the discs and pads on the Asteroid. All pre arranged, all prepared discs an pads "on location" proper set up four post - everything.

    Had to hang around for four hours while the driver from Europarts brought a service exchange caliper. Some things you just can't anticipate :-(
     
Advertisements