When bleeding brakes
#1
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When bleeding brakes
Do you use a section of clear silicone hose over the nipple to watch for air bubbles? And if so what size would it be to bleed a set of 4pots
Thanks in advance
Thanks in advance
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was looking at the brake bleeding kit but didn't know if they are any good? How can you see if there's no air or its fresh fluid if you'd ure in the car pressing the brake pedal?
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With the kit you get a nozel which attaches to your spare wheel, this then connects to a sort of header tank full of brake fluid, this then connects to your brake fluid reservoir. When you open the vale at the spare tyre end this fills the brake system with fluid under pressure. All you do is go round each caliper one at a time and open the bleed nipple and allow the old fluid to be forced out under pressure, use a tube to direct it into a catch tank. I went round twice just to be sure, also make sure the header tank doesn't run empty!
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i have never got the gunson to work on my newage brake reservoir.
Had to drill a hole in the reservoir cap as the ones in the gunson kit dont fit. And then the system isn't air tight on the subaru so it just sucks all the fluid in and then pushes it out through the cap.
2 man job every time for me.
Had to drill a hole in the reservoir cap as the ones in the gunson kit dont fit. And then the system isn't air tight on the subaru so it just sucks all the fluid in and then pushes it out through the cap.
2 man job every time for me.
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You can also get a kit that has a one way valve so when bleeding you don't have to keep closing the bleed nipple as the fluid can't travel back into the caliper.
Have used this on the bike but not tried it on the car yet.
Have used this on the bike but not tried it on the car yet.
#15
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I use one of these kit's, superb for 1 man job. 1 tip is to grease or vaseline all the way around the nipple threads as this prevents air been sucked back in through the cracked off nipple. Then just wipe it off after you have finished bleeding and tightened the nipple back up.
#16
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So you'd link the hose from nipple to reservoir, crack it open and fill the reservoir. Then pump brake, keep an eye on level until the fluid comes through the pipe into the reservoir. All you'd do once your happy all the air is out is tighten up the nipple and pull the pipe off over a container.
I've just done mine. All i did was have a small pipe into an old takeaway container, cracked the nipple and started to watch it drip. The level in the reservoir barely moves until you pump the brakes, so i just kept topping up, pumping the brakes and repeated on all 4.
I didn't have a hose long enough to try the other idea.
#18
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I usually work on feel, and bleed at least 250ml of fluid out per corner. With a few pumps on the brake pedal with the bleed valves CLOSED to asses pedal feel (engine off) to ensure its rock solid.
If the reservoir ever runs dry...start again!
Also its not just bubbles you are watching for...its also fluid colour.
Last edited by ALi-B; 24 April 2012 at 03:19 PM.
#19
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The problem here is when releasing the brake pedal, air can be sucked back though the threads of the bleed valve.
If you ever use a vacuum bleeder you can cleary see it sucking air through the bleed valve threads.
#20
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Of course you wouldn't want to re-use the old fluid that goes without saying.
Vaccuum bleeders are good if you have a compressor, but i've known them to not be the solution in the past.
There's nothing like using the braking system under its own steam to push fluid through and therefore air out.
Vaccuum bleeders are good if you have a compressor, but i've known them to not be the solution in the past.
There's nothing like using the braking system under its own steam to push fluid through and therefore air out.
#21
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A quick tip,
Bleed nipple open
Fit the bleed hose into a bottle
Press brake pedal 8 times job done,
I do this on mine and works perfectly
Although I can't be held responsible if u do it wrong, just make sure the resovoir is always full while doing it, or get a mate to help
Bleed nipple open
Fit the bleed hose into a bottle
Press brake pedal 8 times job done,
I do this on mine and works perfectly
Although I can't be held responsible if u do it wrong, just make sure the resovoir is always full while doing it, or get a mate to help
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Will air not get sucked into the system if you release the depressed brake pedal while the bleed nipple is open? I have always done it by getting a mate to open bleed nipple , I depress pedal , they tighten the nipple then I release the pedal?
#25
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If the bleed nipple is open and the pipe connected to it is in about 30mm of fluid then in theory the only thing to get sucked through will be brake fluid from the reservoir. That is of course if you have plenty of fluid in the reservoir. If you depress the pedal you will notice a significant drop in fluid in the reservoir where it is being sucked in and back out the nipple/pipe.
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