NATEF Task Area A 5 Brake Systems A. General Brake System Diagnosis B. Hydraulic System Diagnosis & Repair C. Drum Brake Diagnosis & Repair D. Disc Brake Diagnosis & Repair E. Power Assist Diagnosis & Repair F. Wheel Bearing, Parking Brake, Electrical D & R G. Anti lock Brake & Traction Control Systems
A5.A.1 A. General Brake System Diagnosis Complete work order to include customer information, vehicle identifying information, verify customer concern, related service history, cause, correction. Have the Customer Sign & Date the R.O.
A5.A.2 A. General Brake System Diagnosis Identify & interpret brake system concern; determine necessary action.
A5.A.3 A. General Brake System Diagnosis Research applicable vehicle and service information, such as brake system operation, vehicle service history, service precautions, and technical service bulletins.
A5.A.4 A. General Brake System Diagnosis Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, calibration decals)
A5.B.1 B. Hydraulic System Diagnosis & Repair Diagnose pressure concerns in the brake system using hydraulic principles (Pascal's Law).
A5.B.2 B. Hydraulic System Diagnosis & Repair Measure pedal applied height; determine necessary action.
A5.B.3 B. Hydraulic System Diagnosis & Repair Check master cylinder for internal and external leaks and proper operation; determine necessary action.
A5.B.4 B. Hydraulic System Diagnosis & Repair Remove, bench bleed, and reinstall master cylinder.
A5.B.5 B. Hydraulic System Diagnosis & Repair Diagnose poor stopping, pulling or dragging concerns caused by problems in the hydraulic system; determine necessary action.
A5.B.6 B. Hydraulic System Diagnosis & Repair Inspect brake lines, flexible hoses, and fittings for leaks, restrictions, kinks, rust, cracks, bulging or wear; tighten loose fittings and supports; determine action.
A5.B.7 B. Hydraulic System Diagnosis & Repair Fabricate & install brake lines (double flare & ISO types); replace hoses, fittings, & supports as needed.
A5.B.8 B. Hydraulic System Diagnosis & Repair Select, handle, store, and install brake fluids to proper level.
A5.B.9 B. Hydraulic System Diagnosis & Repair Inspect, test, replace metering (hold off), proportioning (balance), pressure differential, & combination valves.
A5.B.10 B. Hydraulic System Diagnosis & Repair Inspect, test, replace, and adjust height (load) sensing proportioning valve.
A5.B.11 B. Hydraulic System Diagnosis & Repair Inspect, test, replace, and adjust height (load) sensing proportioning valve.
A5.B.12 B. Hydraulic System Diagnosis & Repair Bleed (manual, pressure, vacuum or surge) brake system
A5.B.13 Flush hydraulic system. B. Hydraulic System Diagnosis & Repair
A5.C.1 C. Drum Brake Diagnosis & Repair Diagnose poor stopping, noise, pulling, grabbing, dragging or pedal pulsation; determine necessary action.
A5.C.2 C. Drum Brake Diagnosis & Repair Remove, clean (w/proper safety procedures), inspect, & measure brake drums; service/replace as needed.
A5.C.3 C. Drum Brake Diagnosis & Repair Mount brake drum on lathe; machine braking surface.
A5.C.4 C. Drum Brake Diagnosis & Repair Remove, clean, and inspect brake shoes, springs, pins, clips, levers, adjusters/selfadjusters, other related brake hardware, and backing support plates; lubricate and reassemble.
A5.C.5 C. Drum Brake Diagnosis & Repair Remove, inspect, and install wheel cylinders.
A5.C.6 C. Drum Brake Diagnosis & Repair Pre adjust shoes & parking brake before installing brake drums or drum/hub assemblies & wheel bearings.
A5.C.7 C. Drum Brake Diagnosis & Repair Install wheel, torque lug nuts, and make final checks and adjustments.
A5.D.1 D. Disc Brake Diagnosis & Repair Diagnose poor stopping, noise, pulling, grabbing, dragging or pedal pulsation; determine necessary action.
A5.D.2 D. Disc Brake Diagnosis & Repair Remove caliper from mounting; clean & inspect for leaks & damage; determine necessary action.
A5.D.3 D. Disc Brake Diagnosis & Repair Clean and inspect caliper mounting and slides for wear and damage; determine necessary action.
A5.D.4 D. Disc Brake Diagnosis & Repair Remove, clean, and inspect pads and retaining hardware; determine necessary action.
A5.D.5 D. Disc Brake Diagnosis & Repair Disassemble and clean caliper assembly; inspect parts for wear, rust, scoring, and damage; replace seal, boot, and damaged or worn parts.
A5.D.6 D. Disc Brake Diagnosis & Repair Reassemble, lubricate, and reinstall caliper, pads, and related hardware; seat pads, and inspect for leaks.
A5.D.7 D. Disc Brake Diagnosis & Repair Clean, inspect, and measure rotor with a dial indicator and a micrometer; follow manufacturer s recommendations in determining need to machine or replace.
A5.D.8 Remove & reinstall rotor D. Disc Brake Diagnosis & Repair
A5.D.9 Refinish rotor on vehicle. D. Disc Brake Diagnosis & Repair
A5.D.10 Refinish rotor off of vehicle D. Disc Brake Diagnosis & Repair
A5.D.11 D. Disc Brake Diagnosis & Repair Adjust calipers with integrated parking brake system.
A5.D.12 D. Disc Brake Diagnosis & Repair Install wheel, torque lug nuts, and make final checks and adjustments.
A5.E.1 E. Power Assist Units Diagnosis & Repair Test pedal free travel with & without engine running; check power assist operation.
A5.E.2 E. Power Assist Units Diagnosis & Repair Check vacuum supply (manifold or auxiliary pump) to vacuum type power booster.
A5.E.3 E. Power Assist Units Diagnosis & Repair Inspect the vacuum type power booster unit for vacuum leaks; inspect the check valve for proper operation; determine necessary action.
A5.E.4 E. Power Assist Units Diagnosis & Repair Inspect & test hydraulically assisted power brake system for leaks and proper operation; determine necessary action.
A5.E.5 E. Power Assist Units Diagnosis & Repair Measure and adjust master cylinder push rod length.
A5.F.1 F. Wheel Bearing, Parking Brake, Electrical Diagnosis & Repair Diagnose wheel bearing noises, wheel shimmy, and vibration concerns; determine necessary action.
A5.F.2 F. Wheel Bearing, Parking Brake, Electrical Diagnosis & Repair Remove, clean, inspect, repack, & install wheel bearings, replace seals; install hub & adjust wheel bearings.
A5.F.3 F. Wheel Bearing, Parking Brake, Electrical Diagnosis & Repair Check parking brake cables and components for wear, rusting, binding, and corrosion; clean, lubricate, and replace as needed.
A5.F.4 F. Wheel Bearing, Parking Brake, Electrical Diagnosis & Repair Check parking brake operation; adjust as needed.
A5.F.5 F. Wheel Bearing, Parking Brake, Electrical Diagnosis & Repair Check operation of parking brake indicator light system.
A5.F.6 F. Wheel Bearing, Parking Brake, Electrical Diagnosis & Repair Check operation of brake stop light system; adjust and service as needed.
A5.F.7 F. Wheel Bearing, Parking Brake, Electrical Diagnosis & Repair Replace wheel bearing and race.
A5.F.8 F. Wheel Bearing, Parking Brake, Electrical Diagnosis & Repair Inspect and replace wheel studs
A5.F.9 F. Wheel Bearing, Parking Brake, Electrical Diagnosis & Repair Remove and reinstall sealed wheel bearing & hub assembly
A5.G.1 G. Anti lock Brake & Traction Control Systems Identify & Inspect anti lock brake system (ABS) components; determine necessary action.
A5.G.2 G. Anti lock Brake & Traction Control Systems Diagnose poor stopping, wheel lock up, abnormal pedal feel or pulsation, and noise concerns caused by the anti lock brake system (ABS); determine necessary action.
A5.G.3 G. Anti lock Brake & Traction Control Systems Diagnose anti lock brake system (ABS) electronic control(s) and components using self diagnosis and/or recommended test equipment; determine necessary action.
A5.G.4 G. Anti lock Brake & Traction Control Systems Depressurize high pressure components of the anti lock brake system.
A5.G.5 G. Anti lock Brake & Traction Control Systems Bleed the anti lock brake system s (ABS) front and rear hydraulic circuits.
A5.G.6 G. Anti lock Brake & Traction Control Systems Remove and install anti lock brake system (ABS) electrical/electronic and hydraulic components.
A5.G.7 G. Anti lock Brake & Traction Control Systems Test, diagnose, and service ABS speed sensors, toothed ring (tone wheel), and circuits using a graphing digital multimeter (GMM)/digital storage oscilloscope (DSO) (includes output signal, resistance, shorts to voltage/ground, and frequency data).
A5.G.8 G. Anti lock Brake & Traction Control Systems Diagnose anti lock brake system (ABS) braking concerns caused by vehicle modifications (tire size, curb height, final drive ratio, etc.).
A5.G.9 G. Anti lock Brake & Traction Control Systems Identify traction control/vehicle stability control system components