The function of the steering system is to convert the rotary movement of the steering wheel into an angular turning of the front wheels. It also multiplies the driver’s effort by leverage or mechanical advantage so that it makes easier to turn the wheels. Steering knuckles carry the front wheels that run on the ball or tapered roller bearings. Hence, the steering system also must absorb some part of road shocks and prevent them from transmitting to the driver.
When the driver turns the steering wheel, it transmits the resulting motion to a steering tube. This tube rotates inside the steering column and transmits the motion further to the steering gear-set fitted at the end of the steering tube. Steering gear set changes the direction of motion and multiplies the twisting force according to the gear ratio. The output or roller shaft rotates and moves the itman arm. It further transmits the motion to the steering knuckle thru’ the relay rod, the idler arm, tie rods, and steering arms
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