Exam 97: Brake Bleeding Methods and Procedures

Two technicians are discussing bench bleeding a master cylinder. Technician A says that the front (nose end) of the master cylinder should be bled first. Technician B says that rear (brake pedal end) should be bled first. Which technician is correct?

Two technicians are discussing how to loosen bleeder valves. Technician A says that a shock is usually necessary to break the taper at the base of the valve. Technician B says to apply steady, loosening torque to the bleeder valve using a 6-point wrench. Which technician is correct?

The bleeder is opened at a caliper and no brake fluid flows out. Technician A says that this is normal and that brake fluid should not flow or drip out of an open bleeder valve. Technician B says that the vent port in the master cylinder may be blocked. Which technician is correct?

Technician A says that the brake pedal should be depressed with as much force as possible during the normal bleeding procedure. Technician B says that the brake pedal should be pumped rapidly during this manual bleeding procedure to force the air down toward the bleeder valve(s). Which technician is correct?

How does a bleeder valve seal?

While bleeding brakes, how long should you wait between strokes?

Technician A says that the wheel brake farthest from the master cylinder is generally bled first. Technician B says that the wheel brake closest to the master cylinder is generally bled first. Which technician is correct?

When bleeding wheel brakes, the bleeder screw is usually loosened one-half turn.