Bleeding brakes

[RichardAlexander]

Thats the second night under the bus trying to bleed the brakes. What am I doing wrong?
Got the mises in the van pushing the brake down a bit of air comes out after 2or3pumps all good pedal pressed tighten the nipple onto the next. Started rear right, I am a lhd, then rear left then front right then front left. Right . Brakes still bloody spongy pump the break all is fine, not losing fluid when the brake are pump up even if a stand on them so air right, wrong I don't bloody know HELP

 

[67panel]

first make sure that there is free play between the pedal push rod and master cylinder.servo?drums?or discs.if calipers are the nipples at the top ,if not swop side to side.

 

[RichardAlexander]

Drums all round! Everything was good until I changed the cylinder on the front right

 

[Moseley]

Try pushing pedal down, then release the nipple and allow the fluid / air to flow out. Tighten the nipple back up again, and then release the brake pedal. Repeat process until no air bubbles flow out.

I've tried pressure bleeders and other methods in the past, and that way has never failed me.

The point where the last of the air is expelled from the system should suddenly make the pedal go very stiff in comparison - if your mrs didn't feel this then it sounds as if air is still present.

 

[Trikky2]

Another thought but memory failure here. I can't remember if your year of bus has the pressure regulator or not.

If it does have one then there is a bleed nipple on it.

 

[RichardAlexander]

Another thought but memory failure here. I can't remember if your year of bus has the pressure regulator or not.

If it does have one then there is a bleed nipple on it.

Is that under the belly pan

 

[RICH-I-AM]

Another thought but memory failure here. I can't remember if your year of bus has the pressure regulator or not.

If it does have one then there is a bleed nipple on it.

Single circuit brakes I would have thought.
Thought inline regulators would be on the disc brake models.

Rich

 

[Trikky2]

Another thought but memory failure here. I can't remember if your year of bus has the pressure regulator or not.

If it does have one then there is a bleed nipple on it.

Single circuit brakes I would have thought.
Thought inline regulators would be on the disc brake models.

Rich

Yea, sounds right, forget the regulator idea.

 

[*Sam*]

How old is the flexi pipe on that side, perhaps the inside is collapsing causing a blockage.

 

[RichardAlexander]

by all counts 45 years old, they dont look that old but i dont know
try again tonight been advised to pump to get pressure then release the nipple tighten and go again :?
MOT SAT so last chance saloon booked mot thinking this would be easy IDIOT

 

[*Sam*]

Think I would get some flexi pipes as it won't take 2 mins to change.
They collapse inside and cause a blockage meaning that you can't bleed the properly

 

[RICH-I-AM]

Try pushing pedal down, then release the nipple and allow the fluid / air to flow out. Tighten the nipple back up again, and then release the brake pedal. Repeat process until no air bubbles flow out.

This should do it.
Press the pedal down slowly (3 to 4 secs).
and the same on pedal up.

Rich

 

[RichardAlexander]

Done, I think, they stop me and I don't have to pump them, if it passes Saturday I booking him for a pro to look at

 

[Moseley]

Once you've got a solid pedal (or at least not über spongey!) it'll be a lot easier to remove any remaining air. When there is air at multiple points, every time you push and hold the pedal, the fluid won't necessarily easily come out of one bleed point, as the pressure you're creating is just compressing the air rather than forcing the fluid out of the nipple you open.

Once a good pedal is achieved, it may be worthwhile wedging a block of wood on the brake pedal overnight, and then doing a quick re-bleed of all the following day.