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[quote=”dexterc” post=153182]Changing out my Brake Master Cylinder. I have four wheel ABS. Two lines go from the Master cylinder to the ABS unit. I am going to use the reverse bleeder method. Can I just bleed at the wheels on the driver side to complete the job? Can I also skip bench bleeding the master cylinder?[/quote]
I would bench bleed the master. Once the master is installed bleed all four wheels.
Question One: Why do I need to bench bleed the master cylinder with the reverse bleeder method since the fluid is going to travel up into the reservoir?
Question Two: There are two lines going from the ABS to the Master Cylinder so why do I need to reverse bleed all four lines at the wheel? I would think the two wheels on the drivers side would be fine. Can you explain your answer?
i wouldn’t . its important to bench bleed so you don’t pump more air into the system . if you bench bleed properly and don’t shake the lines during the master replacement you might be able to skip bleeding at the wheels all together .
[quote=”dexterc” post=153278]Question One: Why do I need to bench bleed the master cylinder with the reverse bleeder method since the fluid is going to travel up into the reservoir?
Question Two: There are two lines going from the ABS to the Master Cylinder so why do I need to reverse bleed all four lines at the wheel? I would think the two wheels on the drivers side would be fine. Can you explain your answer?[/quote]
Once air is in the MC you won’t get it out. You will keep bleeding the system and have a spngy pedal.
Bleeding all four wheels ensures no air and a firm pedal. You may want to change the brake fluid first
before reverse bleeding to save yourself from pushing any dirty fluid back to the new MC.
Keep us posted on your progress.
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