Author Topic: Brake caliper  (Read 4074 times)

0 Members and 2 Guests are viewing this topic.

Angiey2002

  • Guest
Brake caliper
« on: February 02, 2008, 06:49:18 AM »
Hi Guys
Heres the scenario. Overhauled front brake caliper 77 cb550. new seal in piston chamber, totally renewed master cylinder with rebuild kit, new braided lines, new pads so in other words completely new brake system. I had a stripped bleed nipple thread so got a kit to fit helicoil insert which i did. Problem I have is that the system wont bleed and i cant get any pressure. I have noticed that the fluid is still coming out of the bleed nipple when it is closed so I think what is happening is that the nipple is not seating properly in its housing so I have probably gone too far when i drilled the thread out. Any comments appreciated. I have a spare caliper with a bleed nipple housing that looks ok but the brake line fitting thread is stripped. Is it possible to put a helicoil in this fitting and if so what size is it? Am I on the right track regarding the seeping brake fluid?

Offline joeb

  • Hot Shot
  • ***
  • Posts: 404
Re: Brake caliper
« Reply #1 on: February 02, 2008, 06:59:30 AM »
If I'm right you are on the right track I want to say the seat is tapered to fit the bleeder I did the same thing with my 750 drilled to much out and the bleeder would not seat properly .  I used a spare caliper. Hope this helps.

newcbguy

  • Guest
Re: Brake caliper
« Reply #2 on: February 02, 2008, 07:21:34 AM »
I had this happen as well but it was the brake line side. turns out that the seat on the nut was messed up and looked like it was gouged. changed that out with another line and the leak went away.

Offline malcolmgb

  • What am I not? an
  • Expert
  • ****
  • Posts: 1,401
  • The BEST 400 four by far
    • malcnet
Re: Brake caliper
« Reply #3 on: February 02, 2008, 08:03:51 AM »
try this thread

http://forums.sohc4.net/index.php?topic=13965.msg136711;topicseen#msg136711

the repair kit was still available from a NAPA store last October when I bought one.
Malcolm

Artificial intelligence is no match for natural stupidity.

1977 CB400F
1973 CL175 K7
1976 XL175 - Sold
1964 CL72
1966 CA78
http://forums.sohc4.net/index.php?action=gallery;su=user;u=1988

Offline bryanj

  • Really Old Timer ...
  • *******
  • Posts: 14,025
  • CB500 Number 1000036
Re: Brake caliper
« Reply #4 on: February 02, 2008, 01:51:19 PM »
Thats the one that works
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline malcolmgb

  • What am I not? an
  • Expert
  • ****
  • Posts: 1,401
  • The BEST 400 four by far
    • malcnet
Re: Brake caliper
« Reply #5 on: February 02, 2008, 02:23:29 PM »
Thats the one that works

hi Bryan, yes I remembered your excellent thread on this.
Hope the house move went ok.
Malcolm

Artificial intelligence is no match for natural stupidity.

1977 CB400F
1973 CL175 K7
1976 XL175 - Sold
1964 CL72
1966 CA78
http://forums.sohc4.net/index.php?action=gallery;su=user;u=1988

Angiey2002

  • Guest
Re: Brake caliper
« Reply #6 on: February 03, 2008, 03:32:18 AM »
Thanks Guys. Question for BryanJ. Can you get these repair kits in UK or would I have to send to US for them? Thanks.

Offline bryanj

  • Really Old Timer ...
  • *******
  • Posts: 14,025
  • CB500 Number 1000036
Re: Brake caliper
« Reply #7 on: February 03, 2008, 03:45:02 AM »
Yes you can get them in UK.
try
http://www.agriemach.com/product_info.php?cPath=cPath=44&products_id=842.
They do lots of nice, but expensive tools---watch out for the postage costs, if there is anything else you want get it at the same time
Cheers Bryan
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Angiey2002

  • Guest
Re: Brake caliper
« Reply #8 on: February 03, 2008, 04:18:28 AM »
Cheers for that Bryan. Can you confirm that the drill bit I need is 8.5mm and a 1/8 tap bearing in mind that I have helicoiled the bleed nipple thread already as that was the original problem until my heavy handedness caused this latest one?
Thanks
Angus

Offline bryanj

  • Really Old Timer ...
  • *******
  • Posts: 14,025
  • CB500 Number 1000036
Re: Brake caliper
« Reply #9 on: February 03, 2008, 11:21:20 PM »
It gives full instructions on the pack the repair kit comes in and its a while since i did one so check that.
Rip out the helicoil before trying to drill/tap as the coil is so hard it will wreck the tools
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline bryanj

  • Really Old Timer ...
  • *******
  • Posts: 14,025
  • CB500 Number 1000036
Re: Brake caliper
« Reply #10 on: February 03, 2008, 11:23:07 PM »
Afterthought i remember it was an NPT tap (Tapered pipe thread)
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Angiey2002

  • Guest
Re: Brake caliper
« Reply #11 on: February 05, 2008, 12:13:46 AM »
Cheers for that. Much appreciated.
Angus