STANDARD COMPETENCIES:

 

 1. Identify poor stopping, premature wear, pulling, dragging, balance, or pedal feel problems caused by the hydraulic

     system; determine needed action.

 2. Inspect and test master cylinder for internal/external leaks and damage; replace as needed.

 3. Inspect hydraulic system brake lines, flexible hoses, and fittings for leaks and damage; replace as needed.

 4. Inspect and test metering (hold-off), load sensing/proportioning, proportioning, and combination valves; replace as needed.

 5. Inspect and test brake pressure differential valve and  warning light circuit switch, bulbs, wiring, and connectors; repair or replace as needed.

 6. Inspect disc brake caliper assemblies; replace as needed.

 7. Inspect/test brake fluid; bleed and/or flush system; determine proper fluid type.

 8. Identify poor stopping, brake noise, premature wear, pulling, grabbing, dragging, or pedal feel problems caused by mechanical

     components; determine needed action.

 9. Inspect and measure rotors; perform needed action.

 10. Inspect and measure disc brake pads; inspect mounting hardware; perform needed action.

 11. Check parking brake operation; inspect parking brake application and holding devices; adjust and replace as needed.

 12. Identify stopping problems caused by the brake assist (booster) system; determine needed action.

 13. Inspect, test, repair, or replace hydraulic brake assist (booster), hoses, and control valves; determine proper fluid type.

 14. Check emergency (back-up, reserve) brake assist system.

 15. Clean, inspect, lubricate and replace wheel bearings and races/cups; replace seals and wear rings; inspect spindle/tube;

     inspect and replace retaining hardware; adjust wheel bearings. Verify end play with dial indicator method.

  16. Identify, inspect or replace unitized/preset hub bearing assemblies.

 TOPICAL OUTLINE:

 

 I. Hydraulic Brakes Diagnosis and Repair

      A. Hydraulic System

      B. Pressure Differential Valves

      C. Metering Valves

      D. Proportioning Valves

      E. Combination Valves

      F.  Mechanical/Foundation

 

 II. Power Assist Units

     A. Hydraulic Power Boosters

     B. Hydraulic Parking Brake Systems