Mechanics

FLAT BRAKE

1996 Chevrolet Truck • 2WD Automatic •

96' chevy 1500 2wd 5.7 replaced master cylinder, brake booster. Brake pedal still falls to floor. NO LEAKS!What is Wrong?
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Nuaka
June 10, 2011.



Did this start before you replaced the parts? Did you bench-bleed the master cylinder?

Caradiodoc
Jun 10, 2011.
Yes, that was the reason I replaced the parts. I bleed the entire brake system.

Tiny
Nuaka
Jun 13, 2011.
Did you bench-bleed the master cylinder before you installed it? Does it sit at an angle with the front higher than the back?

Caradiodoc
Jun 13, 2011.
No, I bleed the system after installing the new master cylinder, brake booster, new wheel-cylinders; and new rear shoes. No, the truck does not sit higher on either end, it sits level.

Tiny
Nuaka
Jun 16, 2011.
Not the truck; the master cylinder.

Caradiodoc
Jun 16, 2011.
We already replaced the ABS unit. We believe that's what was causing the brakes not to work. But we are still waiting on response of customer. However, I believe the master cylinder was level.

Tiny
Nuaka
Jun 16, 2011.
Rats. A lot of GM master cylinders sit higher in the front and air hangs up right by the steel line. It has to go downhill to be bled out at the wheels or to get sucked back into the reservoir. Bleeding at that connection usually solves the mushy pedal.

Caradiodoc
Jun 17, 2011.