I don't have the instructions handy but there is a small dimple on the parking brake shaft that is used to orient the handle. Obviously I have my lined up incorrectly. I don't remember reading any operating instructions and thought you simply "shifted" the lever to "On" and the brakes were set. Likewise, "Off" would release the brakes. Finally, someone showed me how the parking brake works. Think of the parking brake as a one-way valve that is brought in-line when the lever is moved to "On". The parking brake doesn't really move any hydraulic fluid but it will only let the fluid move in one direction. With the parking brake on, depress one of the brake pedals. Fluid will operate the caliper, the brake pads will squeeze, and the brake is set on that wheel. Release the brake pedal and the pads will continue to squeeze because the one-way valve continues to hold the pressure. Press the other brake pedal and both brakes will be set. Move the parking brake lever to "Off", the valve will open, and the brakes will be released. Now I need to dig out the instruction and figure out how to orient the lever. Or more likely, since I misread the instructions the first time, I'll try the four 90 degree orientations and see which one works.