Quote:
Originally Posted by whateverpratt
I did lr, rr, rf, lf today, twice. The brake fluid coming out of the bleeder valves started out pretty cruddy at first, but now wverything is nice and clean as far as the fluid goes. Only the left rear had any noticeable air bubbles.
My brakes aren't any better than before I bled them. The first time you push on them the pedal goes nearly to the floor before you feel any braking, and the second push gets very firm and brakes after 2 inches of travel. My left front is braking exceptionally hard. If I try to lock up the wheels, only the left one will lock.
Maybe I should bleed them again. Or perhaps it's an adjustment issue.
The way that I bench bled the master cylinder was new to me. The instructions said to mount it in the truck and plug the port (the MC came with a plastic plug). You then pump the brakes slowly and with only about an inch of travel until you don't see air bubbles coming up into the reservoir.
When one wheel locks first you have a bad adjustment of that wheel and/or its opposite. Occasionally this can also be a sticky cylinder. For now....
Keep bleeding till the system is firm above the floor on one stroke. Then go play with adjustments.
I followed those instructions, and I think it worked. The air bubbles stopped, and the pedal got very firm.
Any thoughts? Bleed the mc again? Bleed the wheel cylinders again? Adjust the brakes? All the above?
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Paragraph 2 is the answer to your problem......at this point you still have air in the lines since the pedal pumps up with multiple strokes. Keep bleeding and bleeding. You may have to run as much as a pint or more thru all 4 to push the air out...remember you are pushing it down and it wants to rise up.
In paragraph 4 you bench blead the master and this is required but is only step one of the job. Now you have to get the air out of the lines. Those air bubbles started out close to the master when you took off the old one and now have to be slowely pushed thru many feet of tubing to the wheel cylinder bleed screws.
After you get a firm pedal on the first stroke....then go back and check/draw the shoes closer to the drum. Drawing the shoes closer to the drum will cause the pedal to feel firm much higher in the stroke (i.e. when the pedal firms up with one pump close to the floor the shoe to drum gap is too large on at least one wheel).
pump and pump and pump and pump and then pump some more after a smoke break. they will come up eventually. I've seen it take hundreds and hundreds of pumps to clear a line or three.