Ausmini
It is currently Sat Jul 19, 2025 3:27 am

All times are UTC + 10 hours




Post new topic Reply to topic  [ 8 posts ] 
Author Message
 Post subject: Low brake pedal
PostPosted: Sat Jan 17, 2009 5:24 pm 
Offline
Give Ash some flowers Nick .
User avatar

Joined: Wed Aug 09, 2006 1:22 pm
Posts: 10149
Location: Toowoomba Region, QLD
Hey guys, I am after some idea's why the brake pedal in Ash's clubby remains low and I can't get the brakes to start working until (at best) 1/2 way through the pedal travel.

All wheel cyclinders are either fairly new or brand new. It has freshly machined drums up front with the correct size brake shoes. I have just replaced all 4 front wheel cylinders (today) and I did the back ones a couple of months ago. All brakes have been adjusted. I have bled all corners and am getting a steady amount of fluid with no air.

I am thinking I am going to replace the flexible lines (all 4) and the master cylinder. Any other thoughts cause it's giving me the shits :evil:

_________________
"In two years time your car will be like a lady's clothes, out of date, my car will still be in fashion when I am dead" - Sir Alec speaking to Pininfarina


Top
 Profile  
 
 Post subject:
PostPosted: Sat Jan 17, 2009 5:36 pm 
Offline
Causing or creating vexation

Joined: Wed Jul 21, 2004 10:32 pm
Posts: 19124
My brother owned a Leyland Mini that had a low pedal. No matter what I did it always had a very low pedal, I looked at everything, adjusted them and checked them again and again. Then I finally found the problem....

There was no clevis pin between the brake pedal and the master cylinder! :shock: :shock: :shock:

Check that there is a clevis pin in place and if there is a pin check that there is no wear in the fork or the pin.

I would ignore the hoses for now and go straight for the bottom of the master cylinder. :D


Top
 Profile  
 
 Post subject:
PostPosted: Sat Jan 17, 2009 5:39 pm 
Offline
Give Ash some flowers Nick .
User avatar

Joined: Wed Aug 09, 2006 1:22 pm
Posts: 10149
Location: Toowoomba Region, QLD
Thanks for the suggestion M1100. I forgot to mention, I have already checked it, very little wear on it. The pedal moves about 4mm or so (at the pedal rubber end where you press it) before the action of the pedal starts to move the rod on the master cylinder. I put it all back together with a new split pin as well.

_________________
"In two years time your car will be like a lady's clothes, out of date, my car will still be in fashion when I am dead" - Sir Alec speaking to Pininfarina


Top
 Profile  
 
 Post subject:
PostPosted: Sat Jan 17, 2009 9:04 pm 
Offline
Tomboss Breweros
User avatar

Joined: Wed Dec 31, 2008 9:57 pm
Posts: 7514
Location: Causing mayhem in northern rAdelaide
If the hoses look at all dodgey, replace them, and ballooning is bad.
My trick for bleeding is - full master, open the bleed nipple and get your assistant to pump the pedal 15 times very quickly, do this for all wheels.
Then jack up the car and adjust the brakes till they just drag, no drag and the pedal will be lower than a snakes arse.

_________________
Dean Hutton's first car was a Mini.

kimini wrote:
:mrgreen: It's the boobs and testosterone that make this place fun-ner :lol: !!

Jimmyinamini wrote:
It's not nice to throw spank on the floor.


Top
 Profile  
 
 Post subject:
PostPosted: Sat Jan 17, 2009 9:37 pm 
Offline
Give Ash some flowers Nick .
User avatar

Joined: Wed Aug 09, 2006 1:22 pm
Posts: 10149
Location: Toowoomba Region, QLD
Hoses look ok as it is, but I still think I'll replace them just to be sure.

I have a one man brake bleeder kit, no need for an assistant and am getting solid brake fluid, no bubbles from every pedal stroke, on all four corners.

I have adjusted the brakes so they drag HEAVILY. This is just to see where the brake came to. I will back them off a bit once I get the pedal up.

_________________
"In two years time your car will be like a lady's clothes, out of date, my car will still be in fashion when I am dead" - Sir Alec speaking to Pininfarina


Top
 Profile  
 
 Post subject:
PostPosted: Sat Jan 17, 2009 9:43 pm 
Offline
the King of Bling
User avatar

Joined: Thu Jun 03, 2004 11:11 pm
Posts: 19858
Location: Baulkham Hills
I'd be checking the Hoses..get under it and get someone to pump the peddle

_________________
Stop Licking the Dog...I Don't Care Who Started It


Top
 Profile  
 
 Post subject:
PostPosted: Sun Jan 18, 2009 7:13 pm 
Offline
1275cc
1275cc
User avatar

Joined: Sun Jul 01, 2007 11:25 pm
Posts: 5174
Location: Greensborough, Victoria
1018cc has it been like this since the car was purchased and put on the road or was it better and has since deteriorated as you have previously described :?:

What type of master cylinder and proportioning valve does it have (location, bulk head or rear sub frame)

_________________
http://www.youtube.com/watch?v=nDMkVq1jRGU


Top
 Profile  
 
 Post subject:
PostPosted: Sun Jan 18, 2009 7:16 pm 
Offline
Give Ash some flowers Nick .
User avatar

Joined: Wed Aug 09, 2006 1:22 pm
Posts: 10149
Location: Toowoomba Region, QLD
The pedal has always been pretty low. As long as Ash has had the car the brakes have always started working at around 1/2 way. I'll probably find dodgy crap as I go along because the P.O. didn't know anything (one of the wheel cylinders I replaced was only being held on by one bolt for example).

I reckon it has stayed the same since she's had it.

_________________
"In two years time your car will be like a lady's clothes, out of date, my car will still be in fashion when I am dead" - Sir Alec speaking to Pininfarina


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 

All times are UTC + 10 hours


Who is online

Users browsing this forum: No registered users and 108 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  

© 2016 Ausmini. All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.