Chapter 78

True

A pressure-relief valve is used in a power steering system to protect components from damage.

True

An engine-driven pump and hydraulic system are used to assist steering action in a power steering system.

True

An integral-piston power steering system has the hydraulic piston mounted inside the steering gearbox.

Function of Steering System

Provide directional control for vehicle, maintain correct level of effort needed to turn front wheels, transmit "road feel" to the driver.

Parts of recirculating -ball gearbox

Sector shaft, worm shaft, ball nut.

True

Steering box ratios range from 15:1 to 24:1.

True

The most popular type of steering system on today's vehicles is rack-and-pinion.

True

The two common types of steering systems are worm gear and rack -and- pinion.

Types of pumps used in power steering systems

Vane, roller, slipper, gear.

allow linkage arms to swivel in all directions for suspension and steering

ball sockets

an external ___________ power steering system has the power piston bolted to the frame and center link

cylinder

available types of four wheel steering systems are mechanical, hydraulic and ___________

electronic

A(n) _______________ rack-and-pinion power steering systems senses vehicle speed and steering load to provide adequate road feel for the driver

proportional

power steering systems use either a rotary-type or __________ type control valve to regulate hydraulic pressure into either end of the power cylinder

spool

assembly that supports steering wheel and steering shaft

steering column

connects steering gearbox to steering knuckles and wheels

steering linkage

component that transfers turning motion from steering wheel to steering gearbox

steering shaft

device used by driver to rotate steering shaft

steering wheel