So I've been researching brake bleeding...I bled them by pumping on the brake and then holding it
07-15-2004, 06:53 PM
#1
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So I've been researching brake bleeding...I bled them by pumping on the brake and then holding it
in. I've read a few posts that this is a major no no. How much damage to the master cylinder could I have done by doing it this one time?
07-15-2004, 07:32 PM
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That sounds fine...
Pump brake.
Hold down pedal. / (release pressure fitting, fluid squirts out.)
(close fitting.)
pump brake.
repeat.
Of course, you need two people to do this, () is the person at the wheel.
Hold down pedal. / (release pressure fitting, fluid squirts out.)
(close fitting.)
pump brake.
repeat.
Of course, you need two people to do this, () is the person at the wheel.
07-15-2004, 08:07 PM
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Put pressure on pedal; open bleed valve; pedal goes to floor;
hold pedal at floor; close bleed valve; release pressure on pedal; pedal returns to rest position.
Repeat until there are no more air bubbles. Do in the following order: RP, RD, FP, FD.
Have your assistant follow your directions on when to push/release, and have them call out when they have complied with your directions.
Repeat until there are no more air bubbles. Do in the following order: RP, RD, FP, FD.
Have your assistant follow your directions on when to push/release, and have them call out when they have complied with your directions.
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07-15-2004, 10:46 PM
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The problem with pumping the pedal...
You don't want to extend the pedal past it's normal range of travel. Supposedly, if you do, you'll risk damaging the seals in the master cylinder, and once that happens, it's time for a new master cylinder.
Basically, it goes something like this.
*pump brakes
*push brake and hold
*have person 2 open the bleeder valve
*instruct person 2 to close bleeder when you're at the halfway point, which will come quickly
*repeat from the top as many times as needed
The person opening and closing the bleeder should be gentle on the valve. You don't need to crank it down while bleeding...just close it until you feel the nut make contact. You only need to give it an extra tug (~8 ft lbs) when you're done bleeding that corner.
Basically, it goes something like this.
*pump brakes
*push brake and hold
*have person 2 open the bleeder valve
*instruct person 2 to close bleeder when you're at the halfway point, which will come quickly
*repeat from the top as many times as needed
The person opening and closing the bleeder should be gentle on the valve. You don't need to crank it down while bleeding...just close it until you feel the nut make contact. You only need to give it an extra tug (~8 ft lbs) when you're done bleeding that corner.
