18-1. GENERAL DESCRIPTION
The rotary motion of the steering handwheel is carried to the steering shaft upper, steering shaft lower,
steering gear box and pitman arm. Then as the pitman arm moves, the drag rod is caused to move linearly,
actuating the tie rod to turn the wheels, right and left, through their knuckle arms. The turning force
exerted by the tie rod experiences a damping action due to the presence of the oil seal at the sphere-like
joint between the knuckle case and the inner case (integral with the dead axle sleeve). Another damping
action is available, which will be mentioned below.
The steering system formed by the components named above is designed for easy steering, high durability
and excellent steering reaction as well as reliable self-restoring action. Articulated joints in the steering
lever is equipped with a damping device for ensuring the greater steering stability.
Linkage are of wear-resistant ball-and-socket type. Pitman arm is equipped with a damping device for
ensuring the greater steering stability.
[Right-hand steering vehicle]
Steering Wheel
n’
Steering shaft upper
Steering shaft lower
/
Knuckle arm
/
Steering damper\
Pitman arm
Steering gear box
Drag rod
Fig. 18-1
18-2