INTRODUCTION TO THE HMMWV - OD1615 - LESSON 3/TASK 1
steering torque from the power steering gear to the centerlink.
(2) Idler Arm. The centerlink is hinged on the opposite end of the
pitman arm by means of an idler arm. The idler arm supports the free end of
the centerlink and allows it to move left and right with ease.
(3) Tie Rod. The tie rod connects the steering arms together; it may
be located in front of or behind the centerline of the wheel. The tie rod
is usually of a solid rod construction, but tubular designs are also used.
(4) Tie Rod Ends.
Tie rod ends are used to form a flexible link
between the tie rod and steering arm. The tie rod end usually is fastened
to the knuckle arm with a tapered stud. A socket is provided within the tie
rod end to hold the end of the stud, which is in the form of a ball or yoke.
The socket also allows movement between the knuckle arm and tie rod.
lubrication fitting is usually provided to keep the ball and socket joint
A dust seal covers the tie rod end to prevent dust
from entering the joint and to prevent the loss of lubricant. In the solid
axle configuration, the tie rod end is screwed onto the tie rod and is
secured with clamps.
(5) Adjusting Sleeves.
The inner and outer tie rods are connected by
adjusting sleeves. These are tubular in design and threaded over the inner
and outer tie rods.
The adjusting sleeves provide a location for toe
Clamps and clamp bolts are used to secure the sleeves.
manufacturers require the clamps to be placed in a certain position in
relation to the tie rod top or front surface to prevent interference with
In the preceding paragraphs, the components that comprise the service
brakes, parking brakes, and the steering system(s) on the HMMWV were
discussed, together with the operation of these systems.
In the next lesson, the characteristics and operation of the electrical
system found on the HMMWV will be discussed.