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CHECKING AND ADJUSTING STEERING GEOMETRY. TOPIC 3. OBJECTIVES. Plan prepare for checking and adjusting steering geometry Explain and perform pre-checks on suspension components relating to steering geometry Analyze information and compile a condition report on suspension components
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OBJECTIVES • Plan prepare for checking and adjusting steering geometry • Explain and perform pre-checks on suspension components relating to steering geometry • Analyze information and compile a condition report on suspension components • Perform wheel alignment and adjustment
WHAT IS STEERING GEOMETRY? ANSWER; • Wheel alignment consists of six angles; • Camber • Caster • Toe-in • Toe-out on turns • Steering Axis • Scrub Radius
CAMBER ? • Camber is the inward and outward tilt of wheel assembly when viewed from the front of the vehicle.
CASTOR? • Caster is the angle of the steering pivot, measured in degrees, when viewed from the side of the vehicle.
TURN-OUT ON TURNS? • Toe in and toe out. Toe is determined by the difference in distance between the front and rear of the left and right hand-wheels.
STEERING AXIS INCLINATION? • Scrub radius is the distance between the point where the SAI line crosses the ground line ( )and where the centre line of the tyre crosses the ground.
SO 3.1 PLAN AND PREPARE FOR CHECKING AND ADJUSTING STEERING GEOMETRY • Select specifications for steering geometry. • Select tools and equipment. • Adhere to workshop procedures and safety to perform wheel alignment adjustments. • Adhere to the manual illustrations and procedures.
SO 3.1 PLAN AND PREPARE FOR CHECKING AND ADJUSTING STEERING GEOMETRYContinue • Safety Tips: • Clean area around and under machine. • Ask for assistance to guide vehicle on machine. • Align vehicle on machine and turn tables. • Drive slowly on and off the machine. • Block the vehicle before doing any adjustments
SO 3.2 EXPLAIN AND PERFORM PRE-CHECKS ON SUSPENSION COMPONENTS RELATING TO STEERING GEOMETRY • Check rear and front tyres tracking • Check suspension and steering components for wear • Check steering box free play • Check wheel bearings for excessive free play • Measure the ride height • Check tyre pressure • Check vehicle frame for accident damage • Check for broken or sagged springs • Inspect tyre for excessive wear and damage • Inspect wheel rims for buckling
ANALYSE INFORMATION AND COMPILE A CONDITION REPORT ON SUSPENSION COMPONENTS, SO 3.3 • Explain the reason for pre-checks on suspension. • Compare findings with manufacturer specifications. • Compile a report on the overall condition of suspension and submit report to lecturer/workshop manager.
Perform wheel alignment and adjustment SO 3.4 • This subject outcome explains how to set the wheel alignment. • Remember the subject outcomes 3.1, 3.2, and 3.3 is the key building blocks/pre-knowledge to perform wheel alignment. • The lecturer will now introduce you to the testing equipment and demonstrate the wheel alignment process. • REMEMBER SAFETY FIRST
CREDITS • Hunter wheel balancing • Google images • CDX • Presenter Media Emoticons