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57 STEERING 10 FAULT DIAGNOSIS VISUAL AND SAFETY CHECKS WARNING: Before taking vehicle out on checks are carried out to ensure that the vehicle Tyres and wheel rims 1. Check and adjust tyre pressures. See GENERAL SPECIFICATION DATA, 2. Check condition of tyres. Inspect for signs of uneven wear, damage and feathering. Check 3. Ensure that the tyre make, type and general condition are common across each axle. 4. Check wheel rims for signs of damage and excessive run out. 5. Carry out road test. See Road Test Procedure ROAD TEST PROCEDURE General steering/handling problems can usually be WARNING: Ensure that all road tests are traffic conditions allow. 1. Carry out visual and safety checks. See Visual and Safety Checks Confirm general nature of complaint with customer, 2. Steering load assessment - drive at 16 km/h (10 mph). Put 90 ° turn input into steering wheel, check self centering. The self centering should 3. Steering assessment - drive at 64 km/h (40 mph) on a staight FLAT road (no camber), check for 4. Directional stability assessment - drive at 112 km/h (70 mph) or maximum legal speed on a 5. Braking assessment (medium effort) - drive at 96 km/h (60 mph) on a straight flat road. Apply 6. Braking assessment (full effort) - drive at 96 km/h (60 mph) on a straight flat road. Apply full If the symptom described by the customer is stiff See Stiff Steering Checklist If not proceed with basic checks and adjustments. |