Parking Brake and Power Brake

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Name ___________________ Homework #6 Parking Brake and Power Brake Chapter 9 1) Explain the difference between Parking Brake and the Service Brake 2) What does a Parking Brake Equalizer do? 3) Describe how an Auxiliary Drum Parking Brake works. 4) Explain how an Integral Disc Brake Parking Brake works. (You can explain either the Screw & Nut style or the Ball and Ramp) 5) If you have drum brakes, why should you adjust the service brake BEFORE the parking brake? 6) Explain a typical under-car adjustment for drum brake parking brakes. Page 1 of 3 7) A special tool is required to complete a Disc-Brake Caliper Self-Adjustment Reset. What does this tool do? (How does it get the piston to move back into the caliper?) 8) After replacing a caliper, how can you set the initial clearance for the self adjusting rear disc brake caliper? 9) What are the two main Types of Power Brakes? 10) Vacuum is created in a running engine however it goes down under heavy engine loads and goes away entirely when the engine is shut off. How in the booster able to provide reserve braking when vacuum is low or the engine dies? 11) How do Vacuum Brake Boosters provide a “Pedal Feel” to let the driver know how much pressure is being applied to the service brakes? 12) Where are Power Boosters mounted? 13) How do you test the operation of the vacuum booster? 14) How can you check for a leaking vacuum booster? Page 2 of 3 15) What will happen if the Booster Pushrod Clearance Adjustment is too high? 16) How can you check the Booster Pushrod Clearance Adjustment? 17) The Hydro-boost brake is a Mechanical Hydraulic Power Brake. Where does this systems get the hydraulic fluid and pressure from? 18) What should you inspect to ensure the Hydro-Boost system operated properly? 19) What tests can be done to check a Hydro-Boost for proper function? 20) How do you bleed the Hydro-Boost to get rid of air in the hydraulic lines? 21) Any hydraulic system using an accumulator should have accumulator pressure relieved before opening or disconnecting any component. How do you relieve accumulator pressure in a hydraulic power brake system? (look under Powermaster Service pg 210) Page 3 of 3 .

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