brake problems

[oldboyracer64]

hi sorry to be a pain but i need help again
the brake pedal has gone long as it feels like you have no brakes but we jacked the car up all 4 wheels off the ground and spun the wheels pressed the pedal and all wheels stop all pads and shoes are good also there is no leeks anywhere we have bleed about 2 lts of fluid and this has not done anything
the type of brakes we have is one back to front pipe with a t peace on the subframe and at the front we have a round valve on the bulkhead and a servo hope you can help thanks
david

[guru_1071]

have you had the brakes in bits recentley?

[dfraser]

Hi there, I've had this problem after a major rebuild. I have a couple of suggestions which may be worth a shot (they assume everything is in good working order and fitted right). First is to get an easy bleed kit in order to suck any air out of the system. I used this kit after installing 90% new components to my system, and it worked a treat. You can get the kit from the likes of Halfords, I think it’s made by Gunsons. The other method requires patience and not much work really – it worked for me on a previous rebuild. Jack the rear of the car up as high as possible , open the bleed screws, connect the bleed pipes give it a couple of pumps to get it started, then just leave it – either overnight or longer if necessary. Repeat the process for the front if necessary. I was sceptical about this method, but it did work for me.
Best of luck with that.
David

[robminiman]

dfraser said:

Hi there, I've had this problem after a major rebuild. I have a couple of suggestions which may be worth a shot (they assume everything is in good working order and fitted right). First is to get an easy bleed kit in order to suck any air out of the system. I used this kit after installing 90% new components to my system, and it worked a treat. You can get the kit from the likes of Halfords, I think it’s made by Gunsons. The other method requires patience and not much work really – it worked for me on a previous rebuild. Jack the rear of the car up as high as possible , open the bleed screws, connect the bleed pipes give it a couple of pumps to get it started, then just leave it – either overnight or longer if necessary. Repeat the process for the front if necessary. I was sceptical about this method, but it did work for me.
Best of luck with that.
David

+1 i have to do this on my trials bike to get brake pressure nevr needed it on a car but worth a try

[annodomini2]

1. Check the fluid level

2. As has been said bleed the brakes first if they haven't been.

If this doesn't solve the problem its either:

3. Most likely if not bleeding, distribution valve on the bulkhead, notorious for failing.

4. Master cylinder issue.

[Cooperman]

When you bleed the rear brakes, make sure that the bleed valve(s) is open on each side before pressing the pedal. If you press the pedal before opening the bleed valve, the pressure can operate the limiting valve which prevents the balance unit from allowing any fluid (or air) out.
If it's not air, then suspect the master cylinder,

Peter

[Dino42]

I'm surprised no one else has said this, so I will

Adjust the rear brakes!

.... Firstly make sure the handbrake is fully off - cables loose, quadrants and levers free.(loosen the cables if needed)
Then adjust up the brakes, finally adjust up the handbrake if needed.

[oldboyracer64]

guru_1071 said:

have you had the brakes in bits recentley?

yes i have hade all the brakes apart to look for leeks
will look in to this when my son gets home on monday thanks
david

[guru_1071]

oldboyracer64 said:

guru_1071 said:

have you had the brakes in bits recentley?

yes i have hade all the brakes apart to look for leeks
will look in to this when my son gets home on monday thanks
david

have you had the calipers off?

if so, did you fit them back on the correct sides?

bleed nipples at the top?

if you fit them the wrong way round they will still bleed, work (okish!), but as there is so much air in the calipers the brake pedal remains very long.

its a very common mistake

[oldboyracer64]

guru_1071 said:

oldboyracer64 said:

guru_1071 said:

have you had the brakes in bits recentley?

yes i have hade all the brakes apart to look for leeks
will look in to this when my son gets home on monday thanks
david

have you had the calipers off?

if so, did you fit them back on the correct sides?

bleed nipples at the top?

if you fit them the wrong way round they will still bleed, work (okish!), but as there is so much air in the calipers the brake pedal remains very long.

its a very common mistake

yep have done that before so did check and nipples are at the top