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ACT CH18

TermDefinition
steering column surrounds and supports the steering shaft. The bottom portion is perforated metal or a wire mesh. It's designed to collapse during a collision.
steering shaft assembly connects the steering wheel to the steering gear. Usually consists of upper and lower shafts
steering gear changes the rotating motion of the steering shaft to a back-and-forth movement of the steering linkage
steering linkage consists of the components that transfer the motion of the steering gear to the vehicle's wheels
steering knuckle the connection between the steering and suspension systems
rack-and-pinion steering system is bolted to the cowl
The major components of this assembly include the rack which is a toothed rod
parallelogram steering gear takes the rotating action of the steering wheel
pitman arm converts the rotation of the sector shaft to a back-and-forth motion and transfers this motion to the rest of the steering linkage
center link a major part of a parallelogram linkage/is moved to the left or right by the pitman arm/supports one end of the center
idler arm a major part of a parallelogram linkage/is bolted the vehicle's frame and moves as the center link pivots/not all parallelogram steering systems have one
tie rods provides connections between the ends of the center link and the steering arms
suspension system isolates the vehicle's body from vibrations caused by the up-and-down movement of wheels
springs are the compressible link between a vehicle's suspension and its body or frame
shock absorbers commonly called shocks
MacPherson strut assembly a self-contained unit that consists of a shock absorber and a coil spring
control arms pivoting suspension components that help maintain alignment of the wheel or axle assembly while permitting needed mmovement
ball joints ball-and-socket joints that allow suspension components to move up and down
bushings allow suspension components to move without transmitting vibration and noise to the vehicle's frame or body
strut rods metal bars that are mounted between a vehicle's body and a control arm
stabilizer bar is connected to links bolted to the two lower control arms and minimizes body roll during turns
MacPherson strut front suspension is found in many front-wheel-drive unibody vehicles/In this system
short/long arm suspension (SLA) has both a lower control arm and an upper control arm
solid rear suspension has a solid rear axle that connects both rear wheels
electronic suspension system keeps the vehicle level during maneuvers
race the surface in the hub that the bearing contacts
tire pressure monitoring system will inform the driver of incorrect tire pressure
wheels the assemblies on which the tires are mounted
ride height the distance between a specified point on the vehicle and the shop floor
curb weight the weight of the vehicle without passengers or cargo
tracking the ability of vehicle's rear wheels to track directly behind the front wheels
wheel alignment involves checking the suspension parts for damage or wear
front-end alignment checks and sets the front wheels only
thrust-angle alignment involves checking to see that the rear wheels follow directly behind the front wheels
four-wheel alignment checks and sets all four wheels to specifications
total toe adding the left and right toe readings together determines this
toe the tire's orientation in relation to vehicle's centerline
camber the inward or outward tilt of the tire when viewed from the front of the vehicle
cross camber the comparison of the camber on the left or right sides of the vehicle
steering axis inclination (SAI) the angle between an imaginary line through the upper and lower ball joints
included angle the sum of the SAI and the camber angle
caster angle the difference between the steering axis and true vertical
cross caster the sum of the left and right caster values
setback the center of the wheel on one side of the vehicle is not directly across from the center wheel on the other side of the vehicle
pitman sector shaft steering/suspension component that moves the pitman arm back and forth
trailing arm in a solid rear suspension
Created by: cvis
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