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Old 08-05-2020, 07:48 PM
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Tigger4X Tigger4X is offline
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Question FULL BRAKE SYSTEM BLEED HELP NEEDED

I have just finished replacing everything from the master cylinder to the calipers and now have to bleed a bone dry brake system. I've done the usual bleeding of the brakes before, and once I did a bench bleed of a master cylinder using the syringe type bleeder tool. What is the best way to go about this?




I would love to be able to afford one of those Mity-vac electric pressure units, but the budget says No! Maybe a cheap hand pump version?
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Old 08-05-2020, 07:51 PM
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Bleed the master cylinder first and then work your way downstream.


I rigged a plate and a piece of rubber to feed compressed air into the master cylinder. It makes one-person bleeding very, very easy
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Old 08-05-2020, 08:00 PM
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hey,does anyone here know how to.......
 
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i use tubes from outlet holes back to the reservoir, i dont know if you have to fab a prop valve holding thing......i use a mity vac to do the bleeding but a herlper also works, start with the longest line from the master
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Old 08-06-2020, 11:19 AM
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rang-a-stang rang-a-stang is offline
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Last time I did my whole system, I gravity bled it. Was stupid easy. put a vacuum line over each valve and drop that line into a cup/can/bottle, crack all of the valves open, top off your fluid, and make sure it does not go dry. Takes about 2 hours but it is THE EASIEST way to do it. And it works. I was skeptical when others recommended it to me but look it up. If you are in no hurry, that's the way to do it. You can work on something else and the system will bleed itself.

You can make one of those mity-vac systems for cheap with harbor freight stuff. I made one a while ago (you are welcome to borrow it if you pass through Camarillo again anytime soon) and i think i had about $15 in it? Again, google it and you will see a few How-Tos out there.
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Old 08-06-2020, 04:09 PM
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I've had the best results with the one person bleeder sold in the auto parts store. It's basically, a cup, hose and fitting that inserts into your brake bleeder. Just pump the brakes and remove it when you no longer see air bubbles. Gravity bleeding would be my 2nd go to, just takes longer.
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Old 08-18-2020, 04:48 PM
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THANKS FOR ALL THE INPUT GUYS! NEED MORE PLEASE!

I bought the syringe style tool to bleed the master cylinder and it worked great. I managed to keep the mess to a minimum and contained to shop rags. I went to go crack open the RR bleeder valve and then it went sideways. The axle is from a '79 J20 so it is a Dana60. A 3/8" is too small and a 10mm is too loose, risking rounding the buggers off. Is there some weird aftermarket valve that has some wild wrench size I am unaware of? For good measure I sprayed them both with PB Blaster hoping it will help when this gets figured out.
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Old 08-19-2020, 08:33 AM
MysticRob MysticRob is offline
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This worked great on mine:

https://www.harborfreight.com/brake-...der-92924.html
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Old 08-19-2020, 07:59 PM
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gravity bleed...I spent years attempting to use vac tools, etc...grav bleed.
J20
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Old 08-20-2020, 10:27 AM
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I ended up having to drop the axle to get a good grip on the valve with my vice grips, but they were going to inevitably round them off so I opted to smack a 3/8" deep socket on em and sure enough the came out nice n easy.


Quote:
Originally Posted by MysticRob

Having had issues with a number of the Pittsburg tools I used a 20% coupon on the MityVac hand pump unit. To use the one you linked I'll need to borrow a compressor. IThe MV unit seemed like a good find and for a much better price than at my McParts store. Suffice to say it keeps solid pressure when suctioned to my thumb, but not so much on the valve. The 90
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Keep in mind. Getting old is easy. Being old is hard.
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