ASE S5 Suspension & Steering (School Bus) study plan

Map the full steering system from steering wheel to road wheel, labeling each component and its function

Diagnose steering wander, shimmy, and hard-steering complaints by tracing likely root causes to specific components

Explain how to inspect tie rod ends, drag links, and steering gears for play and wear

Describe the procedure for checking and adjusting steering gear lash and preload

Diagnose steering column noise, binding, and tilt/telescoping faults on school bus columns

Inspect and evaluate steering shaft U-joints, collapsible shafts, and rag joints for wear

Trace steering linkage geometry and identify bump steer and linkage interference conditions

Explain proper torque and inspection practices for steering linkage fasteners and castle nuts

Diagnose power steering pump faults including whine, low assist, and fluid aeration

Perform proper power steering fluid flush and bleeding procedures and explain why each step matters

Inspect front suspension components including springs, control arm bushings, ball joints, and kingpins for wear

Differentiate between load-carrying and non-load-carrying ball joint testing methods

Identify front and rear suspension configurations common to school buses including leaf spring, air ride, and I-beam setups

Diagnose leaf spring sag, broken leaves, and worn shackle and hanger bushings

Inspect rear suspension components including springs, torque rods, and track bars for looseness and wear

Explain how suspension wear affects ride height and handling

Define caster, camber, toe, thrust angle, and steering axis inclination and describe how each affects tire wear and handling

Perform a pre-alignment inspection and explain why each check must precede measurement

Diagnose irregular tire wear patterns and match them to alignment or component causes

Inspect hubs, bearings, seals, and wheels for play, runout, and damage

Explain tire load rating, inflation, and matching requirements for school bus applications

Explain air suspension height control valve operation and diagnose ride height faults

Troubleshoot air bag leaks, leveling valve linkage, and air line restrictions

Describe hydraulic suspension control basics where applicable and safety precautions for air systems

Identify safety procedures for supporting a vehicle with air suspension before service

Re-diagnose steering complaints integrating alignment, power assist, and linkage causes

Explain how caster and steering axis inclination affect returnability and steering effort

Diagnose power steering pump pressure and flow complaints using gauge test logic

Integrate alignment readings with component wear to build a repair recommendation

Review all domains using a self-built question set focused on weakest areas

Re-perform timed practice on high-weight domains 1, 4, 3, and 6

Verify mastery of safety procedures across air, hydraulic, and lifting tasks

Identify remaining knowledge gaps and schedule targeted follow-up