The steering linkage for commercial models with independent front suspension consists of the following components:
| • | The pitman arm |
| • | The idler arm |
| • | The relay rod |
| • | Two adjustable tie rods |
| • | The steering shock absorber |
When the steering wheel is turned, the steering gear rotates the pitman arm. This action forces the relay rod to one side. The tie rods are connected to the relay rods by ball studs. The tie rods transfer the steering force to the wheels. The tie rods are adjustable and are used for toe-in adjustments. The relay rod is supported by the pitman arm and the idler arm. The idler arm pivots on a support that is attached to the frame rail.
The motorhome steering linkage has an adjustable tie rod assembly that is similar to the one described above. When the steering wheel is turned, the steering gear rotates the pitman arm. This action forces the non-adjustable connecting rod and the relay arm to move the relay rod to one side. The relay arm and the idler arm are attached to the frame by support assemblies. The support assemblies are adjustable for shaft end play. The steering shock absorber is attached to the frame and to the relay arm.
The steering linkage for the commercial I-beam front axle models uses a connecting rod in order to connect the pitman arm to the relay arm. This adjustable connecting rod is used for centering the steering gear with the front axle.
Inspect the steering geometry and the front alignment whenever any steering linkage components are repaired or replaced. Refer to the following procedures in Wheel Alignment:
