I like to use a vacuum to do my brake bleeding because you can pull all of the fluid out of any line you choose much more quickly and efficiently than without it. This vacuum also assures that if there is any air in the line that it will be drawn out. It is a one person operation and I believe, much more effective at achieving the desired results, just my two cents. I use vacuum for cleaning my fluid for the clutch systems on cars and trucks as well. A lot of lines are bent up and down that it is nearly impossible to "Gravity Feed" the fluid out of these lines. Very few lines, especially to the back brakes, is a down hill run where air will travel up to the reservoir. Most lines to the back are bent up and down which makes it impossible to completely escape as it will travel to the highest point and stay there without some type of assistance, being someone pressurizing (pumping) the brakes as another cracks open bleeder screw or as stated, a vacuum pump.

 

Who gravity feeds lol. That's kind of foolish. The way I do it is one man operation, it's quick, no way to go wrong.

All you have to do is pump the bakes, 18 times for the right rear, close the bleeder, 7 times left rear, close the bleeder. Front right 12 times, front left 7 times, you done system is completely flushed. You can't get any more efficient. You just haven't done it the easy way yet.

To fill new calipers, yea use gravity and nothing else as I explained earlier, or you'll have one big mess on your hands. Then purge the air, what little there doing it that way. Understand it first, then try it you will see. You really mistook that gravity thing lol. I suppose it might be possible, take lots of reading material with yuh.

 

If your bottle is lower than your caliper, you are relying on gravity. Simple as that, but yeah, I was wondering how gravity was any good as I do not trust it to get all of the air pockets out. I like using vacuum because I know that no air is in the system because I am watching the fluid come out and can see how clean it is and if it is free of air. It does take a little longer but I am assured of my worries by being able to see the final product and not rely on doing the job from the front seat and not truly knowing if it is coming out clean or no bubbles. I don't need to pump the brakes at all, just crack and fill. Two different ways of doing the job but as I had a mechanic once tell me, "There are more than one way to do a job, it's just your preference." Some like speed, others like to be sure.

 

Uhmm, no lol. Apparently your still confused. Like I said what, - 3rd time now, If your just filling new calipers, then yes Gravity fill JUST the caliper cavity with new fluid since the system has nothing but new fluid in it. Forces the air out as it fills quickly...done.

What I explained to the OP is the flush bleed, one man, quick way using system function. Sure ? I'm sure it works and completely flushes the system. Your apparently not so sure, since you continue with your gravity fixation. I'm not relying on gravity for that procedure. I'm relying on hydraulic pressure....should be obvious. Bottles lower, tubes higher to help keep all air from returning to the system.

As long as you understand now, I'm good lol.



Anyway OP, no special tools required.

 

That's exactly what I did last night Brewster, except I had my Wife pump the brakes while I watched the fluid. I wanted to make sure it was the clean stuff coming through. That big bottle I posted was full by the time I was done. (16 ounces, after I'd also turkey basted the fluid out of the reservoir)

 

No gravity fixation, just a fact that I can see the fluid with my way of doing it and you can not. End of story.

 

What are you talking about ? Your kidding right ?? I see every bit of fluid.

Yes, the nonsense should end, I knew you could make sense if you tried.

 

The only sense I make is truth. My way is slower but as I said, I can see the fluid and air pockets coming out while I am applying vacuum, your way is faster but I prefer to see the final product instead of sitting in the front drivers seat and just guess as to if the fluid and air has been removed. Two different ways of doing things.

As I had a teacher once say, "Just because your head comes to a point does not make you sharp."

I knew you could make sense of it, as I said, end of story.

 

If I am just replacing front calipers, would I have to bleed rear as well?

 

If the system is temporarily open, no. If you let it sit for several hours, I would. When I am just doing calipers.... I'll just lightly pinch the hose with pinch-off tool to slow the flow, you know?

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