Board logo

Bleeding brakes
beaver34 - 31/8/11 at 08:58 PM

How do people do it?

I've one in my kit car, carnt get the air out of it! It's on twin cylinders so rear has it's own master that then Leeds to the handbrake then out to the rear brakes

Thanks

deltron63 - 31/8/11 at 09:02 PM

I always use a eezi bleed

beaver34 - 31/8/11 at 09:11 PM

quote:
Originally posted by deltron63
I always use a eezi bleed


Mine won't fit on the master cylinder

mark chandler - 31/8/11 at 09:25 PM

Gravity

Brake caliper turned so the nipple is at the absolute top and loose then wait.

It also helps if you have the wheel cylinders pushed tightly in as there is less fluid or air to displace, if you have a little air pocket then gently tapping the caliper will help to dislodge this and the bubble will rise.

gavin174 - 31/8/11 at 09:28 PM

you should always start with the biggest fluid capacity furthest away from master cylinder

normally the nsf.. then osf then furthest rear and nearest rear...

the best way to bleed it if you have the patience is to gravity bleed..

macc man - 31/8/11 at 09:33 PM

This seems to be a common problem with rear calipers. On mine the calipers were reversed so the nipple was at the bottom.
I had to remove it to bleed it as described in last post. Worked a treat.

beaver34 - 31/8/11 at 09:36 PM

Mines at the top,

Fronts fine But the rear is a nightmare,

gavin174 - 31/8/11 at 09:38 PM

how is it plumbed to handbrake / rear brakes?

gavin174 - 31/8/11 at 09:39 PM

are you running rear discs or drums..

what flexi pipes you running at the rear?

beaver34 - 31/8/11 at 09:55 PM

Run braided line into rear of the handbrake, then out of handbrake to rear split then to rear, is on Sierra discs

Ben_Copeland - 1/9/11 at 05:51 AM

Well you certainly have made it tricky for yourself.

Intergral masters you cant easibleed and hydraulic handbrake thats going to be a pain to gravity feed.

cant you do it the old fashioned way and get someone to pump the brakes...?

britishtrident - 1/9/11 at 06:53 AM

Effectively by fitting a hydraulic hand brake you have created a dead leg in the system with no way to bleed it, best way round it is to insert a Tee piece into the line going from the hand brake master cylinder (close to the cylinder) and screw a bleed nipple into the 3rd leg of the tee. You can then bleed this using the single stroke method, open the nipple (don't open too far) operate the hand brake, and with the handbrake still on close the nipple, then repeat 3 or 4 times.

Then do the same for the foot brake.

[Edited on 1/9/11 by britishtrident]

beaver34 - 1/9/11 at 07:11 AM

I've bleed nipple on the handbrake itself, I'll have another Play this week see what happens

Mr Whippy - 1/9/11 at 07:11 AM

I thought for the IVA or even the MOT the handbrake must be mechanical not hydraulic? or is this a race car?

beaver34 - 1/9/11 at 07:11 AM

All ready been svad many moons ago

DH2 - 1/9/11 at 08:17 AM

quote:
Originally posted by beaver34
All ready been svad many moons ago


Same applies to MOT though too, Al. Hydraulic handbrake should be a fail... though these things can sometimes depends on your tester.

Other things worth trying for bleeding: ensure the rear calipers are higher than the master cylinder, help get gravity on your side; leaving the pedal wedged down hard can help encourage air bubbles to migrate to the bleed nipple; disconnecting the fronts on the bias bar will help get more pedal travel into the rear master cylinder; use a vacuum bleeder to suck the fluid through.

DH2

beaver34 - 1/9/11 at 01:38 PM

Sorry have cable unit too, thanks for tips