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Tips for bleeding the MC?

amorth

NAXJA Forum User
Location
Denver, CO
I need to bleed my MC after I let it get a bit too low while bleeding my brakes (I heard it gurgling when I opened the lid to add more fluid). I've google searched the crap out of how to do this (althought pretty much everything I read was how to bench bleed it - I'm not taking it out to do that) and have a pretty good idea of what needs to be done. Can anyone offer up any advice or things to do/look/prep for doing this? Is there a recommended kit to get this done? I've read a few reviews on some kits sold at Advance Auto and they all say they aren't complete - that there should be two bleeder adapters of the same size to do both valves at once.

Thanks all!
 
Unfortunatley... You now have an issue to deal with. Other than replacing the lines at the MC and doing the bleed on the Heep, the MC will need to come off.

One option you could try is a power bleeder. Personally, I use a "one man" bleeder that is a vacuum pump. You still have to bleed at the wheel cylinders though... And watch the MC levels.

Top end power bleeders use a pressurized tank of fluid connected to the MC by replacing the MC cover. Once the system is up to pressure, it is a matter of cracking the wheel bleeds until it runs clear. Call around to your local U-Rent It shops to see if one is available. These use compressed air for the pressure source.

And be prepared to have a ton of fluid on hand. What discharges from each bleeder valve is not supposed to ever go back into the system. To large a chance of contamination.
 
Thanks o-gauge. I'm hoping to not have to remove the MC unless it's absolutely necessary. Could you please explain how by replacing the lines at the MC and then bleeding the Jeep (I'm assuming you meed the brake lines) how that would bleed the MC? Also, if this were the case, are you talking about the hard lines between the MC and the proportioning valve? Or did I just totally misread what you wrote? lol
 
Yup, the lines that sit between the MC and the prop valve.

Make a set of line that bend up and back into the MC. You will need them for the bench bleed anyway. You can use a couple of pieces of clean hose and smaller hard lines.

You can make both lines out of a single pre-made line by cutting said line in half. Do not use a saw, use a tubing cutter...

Bending it is another matter. Takes a tool to do it properly. Fortunately, these a not expensive.
 
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