Steering Linkage Description

The steering linkage connects both of the front wheels to the steering gear through the pitman arm. The steering linkage consists of the following components:
- The inner tie rod
- The outer tie rod
- The relay rod
- The connecting rod
- The idler arm(s)
- The pitman arm
The inner and the outer tie rods attach to the steering knuckle and the relay rod by ball studs. The two idler arms support the relay rod. The idler arms pivot on a support that is attached to the frame rail. The idler arm support is threaded in order to allow the height adjustment of the arm on the support. The height adjustment allows the linkage to clear the suspension as the linkage moves from lock to lock. The original equipment is installed at a preset specification.
The relay rod is attached to the connecting rod. The connecting rod is used in order to maintain the proper geometry in the steering linkage. The connecting rod attaches to, and is supported by, the pitman arm.
The pitman arm is driven by the steering gear. Each joint has a lubrication fitting. The inner pivots use prevailing torque nuts, the outer tie rods use castellated nuts. Replace the prevailing torque nuts and cotter pins any time service removal is necessary.
The overall condition of the steering linkage affects the steering performance. Improper, and possibly dangerous steering action will result if any of the steering linkage displays the following conditions:
- Bent
- Damaged
- Worn
- Poorly lubricated
Check the steering geometry and the front wheel alignment whenever any steering linkage components are repaired or replaced.