eil
Forum Sage
Hi Ed!
Although this doesn't have anything to do with filling the brake lines with fluid, the only place the MC can realistically be clogged up (with as much cleaning as you've already done) is the pin-hole return port. It's one of the two holes in the bottom of the reservoir. One is large and the other is very, very small. Remove the piston, clear the MC completely of fluid, and shine a bright flashlight into the bore. You should see plenty of light through one hole and just a tiny pinhole through the other. The tiniest strand of copper wire you can find should be able to poke it out.
A dry, freshly-cleaned brake system often needs to be "primed" before the MC will start pushing fluid through of its own accord. This is where most people seem to have trouble and either can't get the fluid to flow at all or end up with non-functional or spongy brakes. I'm not an expert at this by any means, but this is my preferred fool-proof brake-bleeding procedure (so far):
1) Rig up your bleeding hoses or whatever you have down by the calipers.
2) Fill the brake reservoir with fluid. While bleeding, don't let it get empty enough to suck air into the system.
3) Remove the brake handle, fill the reservoir with fluid, crack open one bleeder and push the piston in with a screwdriver as far as it will go. Do this a couple times. It will push more air out of the MC than with the brake lever alone. Reattach the brake lever.
4) Use suction instead of pressure to bleed the lines. Down at the calipers, use some kind of vacuum source to pull fluid through the system. There are special vacuum bleeding setups you can buy at great cost, or you can be cheap like me and spend about $1 on a large plastic medical syringe: http://www.amazon.com/Special-Pack-...8&qid=1392051079&sr=8-1&keywords=60cc+syringe
You may have to alternate #3 and #4 once or twice to clear the MC of air. It may or may not help to lightly tap the MC with something plastic. Start to finish, this takes me about 15 minutes. Tying back the brake lever and letting it sit overnight is something I've seen recommended by fellow forum members.
Although this doesn't have anything to do with filling the brake lines with fluid, the only place the MC can realistically be clogged up (with as much cleaning as you've already done) is the pin-hole return port. It's one of the two holes in the bottom of the reservoir. One is large and the other is very, very small. Remove the piston, clear the MC completely of fluid, and shine a bright flashlight into the bore. You should see plenty of light through one hole and just a tiny pinhole through the other. The tiniest strand of copper wire you can find should be able to poke it out.
A dry, freshly-cleaned brake system often needs to be "primed" before the MC will start pushing fluid through of its own accord. This is where most people seem to have trouble and either can't get the fluid to flow at all or end up with non-functional or spongy brakes. I'm not an expert at this by any means, but this is my preferred fool-proof brake-bleeding procedure (so far):
1) Rig up your bleeding hoses or whatever you have down by the calipers.
2) Fill the brake reservoir with fluid. While bleeding, don't let it get empty enough to suck air into the system.
3) Remove the brake handle, fill the reservoir with fluid, crack open one bleeder and push the piston in with a screwdriver as far as it will go. Do this a couple times. It will push more air out of the MC than with the brake lever alone. Reattach the brake lever.
4) Use suction instead of pressure to bleed the lines. Down at the calipers, use some kind of vacuum source to pull fluid through the system. There are special vacuum bleeding setups you can buy at great cost, or you can be cheap like me and spend about $1 on a large plastic medical syringe: http://www.amazon.com/Special-Pack-...8&qid=1392051079&sr=8-1&keywords=60cc+syringe
You may have to alternate #3 and #4 once or twice to clear the MC of air. It may or may not help to lightly tap the MC with something plastic. Start to finish, this takes me about 15 minutes. Tying back the brake lever and letting it sit overnight is something I've seen recommended by fellow forum members.






