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July 3, 2013 8:20 pm  #1


Reverse bleeding ROCKS!!!!

Some time back when I was looking for a better way to bleed hydraulic clutches I came across a youtube video showing the advantages of "reverse bleeding"  For those of you not familiar with the term, when you reverse bleed you use a hand pump (like the one pictured below) and clear tube to pump the fluid into the system from the lowest point.  Prior to attaching the tube to the bleeder you pump all the air out of the tube loosen the bleeder attach the tube to the bleeder then begin pumping.  The idea is air is lighter than the fluid and bubbles want to rise so by filling the system from the bottom the fluid pushes ALL the air out.  Works extremely well with hydraulic clutches, as by any other method, they tend to be a bit of a pain to bleed.  I have used this technique on several hydraulic clutches myself and have recommended it to countless customers.  Even though it works fantastically on clutches, I never tried it on brakes.

All that changed today.  I replaced the MC on the galaxie and reworked the lines.  I decided that since all the air in the system was near the MC that traditional bleeding was not a good idea.  I only filled the MC half full when I bench bled it then I grabbed my hand pump and started with the rear calipers.  Cool part was I could hear the bubbles coming out of the MC and when the sound stopped I moved on to the next bleeder.  I was able to do all 4 bleeders in about 10 minutes, got all the air out the first time, AND was able to do it as a one man job.  I may never bleed any other way again.

 

August 19, 2013 2:49 pm  #2


Re: Reverse bleeding ROCKS!!!!

Wow that is excellent ! I'm going to try this next tiem the need arises ! Thanks for the tip.

 

August 20, 2013 1:40 pm  #3


Re: Reverse bleeding ROCKS!!!!

Daze wrote:

Some time back when I was looking for a better way to bleed hydraulic clutches I came across a youtube video showing the advantages of "reverse bleeding"  For those of you not familiar with the term, when you reverse bleed you use a hand pump (like the one pictured below) and clear tube to pump the fluid into the system from the lowest point.

Where can I buy a hand pump like the one you have?
 


1966 Galaxie 500 2 door 289ci/AT
1965 Chevy C10 Stepside shortbed restoration (in progress) at
http://www.lugnutz65chevystepside.weebly.com
 

August 21, 2013 4:38 pm  #4


Re: Reverse bleeding ROCKS!!!!

I got mine at the auto parts store.  it was simply an oil can with hose and metal end on it.  I removed the hose and attached the vinyl tubing to make it into a reverse bleeder.

     Thread Starter
 

August 21, 2013 6:04 pm  #5


Re: Reverse bleeding ROCKS!!!!

Thanks.  I've never seen one like that before.  I must be shopping at the wrong place.


1966 Galaxie 500 2 door 289ci/AT
1965 Chevy C10 Stepside shortbed restoration (in progress) at
http://www.lugnutz65chevystepside.weebly.com
 

March 18, 2015 8:57 pm  #6


Re: Reverse bleeding ROCKS!!!!

Wow, reverse bleeding does rock! Just wanted to include a pic of what I used to perform this. I used a manual suction gun. I filled it with brake fluid and pushed the fluid thru the system. I removed the threaded large tubing that came with the suction gun, purchased a brass fitting to allow for a smaller clear tubing, that easy. I simply forced all the air out of the gun and tubing, attached tubing to each caliper bleeder valve and pushed away. Had my son watch the master cylinder to make sure it didn't over fill as fluid was being forced thru the lines and also to confirm no air bubbles so I knew when to stop pushing fluid. The only drawback...when I removed the clear plastic tubing off of one caliper to go to the next caliper, brake fluid dripped out of the tubing...kind of messy, so use rags to catch the fluid. Anyway, give it a try, works great.

 

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