2 Suspension Systems Designed to: Maintains directional stability: provide satisfactory vehicle controlacceptable driver effortMaintains directional stability:on various road surfacesall types of weatherloaded and unloadedtowing
3 Road Variables Road Crown Bumps & Pot Holes Crosswinds & Cross winds created by other vehiclesRoad surfacesSide forcesDrive axle forcesSuspension part movement
4 Rear Wheel Alignment & Vehicle Tracking Thrust Line – Imaginary 90 degree angle to the centerline of the rear wheelsRear Wheel Offset – axle asm out of position, not parallel to centerline
14 Positive Caster Helps return to straight ahead position Increases steering effort, the wheels try to stay straightPos caster helps maintain directional stabilityToo much affects steering, rapid wheel returnPulls to side with the most pos caster.
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