pressure bleeders.

bleeding brakes,
im gonna stick some braided hoses on my CBR that i got from the BMF show for 30 notes.

in the haynes manual, it says to use a pressure bleeder tool,
if one isnt available, bleed brakes using a tube and jar, then ride to a honda dealer where they can use the pressure bleeder on the bike.

why is this ?
will you get a better bleed using a pressure bleeder ? how much are they and where can u get em from ?

surely, if your brakes are bled, there bled, there isnt 2 ways about it ?
is it not possible to bleed your brakes the traditional way ?

[northwind]

If anyone suggests you buy a Gunnsons Eezibleed, put them in your little book of enemies Those things are just awful. Though they do have much potential for hilarity, in a not very well made, full of pressurised brake fluid, kind of a way.

I'm not sure why they suggest that, but there might be a good reason.

the bit that confuses me the most, is how do you use a pressure bleeder ?

since we are on the subject, can you not use a syring attached to a one way valve attacjhed to the bleed nipple to pull brake fluid out (filling with new as you go) empty attach and continue etc.?

or is it never going to be that easy?

Andy

[northwind]

Well, the one time I used one, I used it to spray a bottle of brakefluid over the front of the bike. But I suspect that's not really what they're supposed to do.

to be honest, i dont really understand the science of bleeding brakes, i just know how to do it.

can someone technical explain (with diagrams preferbrally "que rictus, sid squid or embee" ) the science of brake bleeding ? for my benefit?

i always thought that the air bubbles would rise through the hoses and emerge in the master cyclinder resivoir ?

what i will do, when im done bleeding, and i understand the bleeding, ill create a flash video on how to bleed brakes for everyone to see (there seems to be many o threads on all kinds of forums about bleeding brakes)

[embee]

been done numerous times before (as we all know ), but I just happened to have changed the brake fluid in 2 of my bikes and a car at the weekend using my trusty Mityvac.

No fuss, no drama, no hassle, just simple empty, refill, bleed, done. First time, no messing, no spongey pedals/levers.

2 big advantages that I can see -

- you can simply suck all the old fluid from the reservoir before filling up with new stuff so no mixing/contamination

- when bleeding you give the pump a few squeezes to create a vacuum in the bottle and then crack open the bleed nipple, this then pulls the fluid through in a continuous flow thus carrying any debris or air with it. Ignore the fact that the nipple threads leak air so the bleed pipes are full of air bubbles, it doesn't matter because no air can get back into the brake system since fluid is flowing out all the time.

Just keep an eye on the reservoir fluid level and don't allow it to get too low. When topping up, allow the new fluid to settle for a minute of so and any small air bubbles will rise to the top before bleeding again (other caliper etc).

And no pressurised fluid either!

Can be done other ways, but once you try one you'll be converted. Money well spent I say.

[northwind]

I was going to mention that, but every time I admit to using a Mityvac I lose 10 Sid Squid Respect Points. I'm far enough in the red as it is

[embee]

Originally Posted by northwind

I was going to mention that, but every time I admit to using a Mityvac I lose 10 Sid Squid Respect Points. I'm far enough in the red as it is

.........bet it works though!

[21QUEST]

Mityvac is for lazy mechanics.

There is a book out 'Learn the art of brake bleeding in five minutes'. Buy it rather than waste your money on useless thingy bobbies.

Cheers
Ben



















:P . Good tool(?) to have really. It's just when mine broke I was forced to learn to do it properly manually. Motrax also do one now. Think taht is £59 though so I expectit got other fancy uses.