I crashed a couple weeks brack, and took out my front brake like in the process, litterally ripping it in half. So anyway i got a new moose front brake like and brake lever and went out today to install it. So at first i left the cover off the master cyclinder and just keep on trying to bleed the brakes. I would pull the lever about 5-10 times, hold it, open up the bleeder screw and close it, then let go of the lever and repeat the process. so after doing that for a hour and a half i figured i must be doing something wrong so i looked at the service manual and it said to keep the cover on. Ok so i put the cover on and did it again. still no pressure at all. So i go and get my one man bleeder and try that. There was no air in the system. So now im getting bull****, The MC is pushing the fluid out to the bleeder valve so i dont know what is going on. I have no pressure whatsoever. Can someone give me a little help? Thanks :bang:
Replaced front brake line, now no front brakes
- Thread starter killer305
- Start date
Senior KX Rider
Super Power AssClown
- Nov 9, 1999
- 8,575
- 0
When I cchange brake lines I use a MityVac to get the air out. You can also use a plastic syringe and a piece of aquarium tubing to pump fluid in from the bottom. Works evry time :cool:
Senior KX Rider
Super Power AssClown
- Nov 9, 1999
- 8,575
- 0
Senior KX Rider
Super Power AssClown
- Nov 9, 1999
- 8,575
- 0
What you want to do with the syringe is open the bleed screw and PUMP fluid in from the bottom until all the air is out. Make sure you have no air in the syringe or tubing and pump it thru. It helps to have another person with a rag to catch the overflow from the reservoir
- Thread starter
- #7
Wouldnt it make more since to suck the fluid out than blow it threw? Im not going to be damaging the MC at all by backfeeding it? Im guessing using your method until no more air is coming out the the resevoir. I will try it tommorow and check back in with the results.
follow the directions you're being told - with a new brake line it will be full of air and you might pump it for 3 weeks before you get pressure - it needs to be reverse bled (push fluid with a syringe from the bleed screw UP to the master cylinder - you will not damage it - don't touch the lever - leave it out).
Senior KX Rider
Super Power AssClown
- Nov 9, 1999
- 8,575
- 0
Works EVERY time :nod:
Gazza2005au
Member
- Mar 27, 2005
- 117
- 0
when bleeding the brakes u should have a tube on the bleeder so it stops the air from rushing back into the brakes ;)
If the seals in the mastercylinder go bad, thsi can happen. However, your brake was working before the change. The new line will hold a lot of air. Way more than the stock mastercylinder can push out.
Do what was suggested by the other members before getting worried about the mastercylinder. I always dred changine a front line for the same reason.
It is slightly easier if you attach the top of the new line, fill the cylinder and line, then wait for fluid to drip out of the bottom before you attach it to the caliper.
Do what was suggested by the other members before getting worried about the mastercylinder. I always dred changine a front line for the same reason.
It is slightly easier if you attach the top of the new line, fill the cylinder and line, then wait for fluid to drip out of the bottom before you attach it to the caliper.
