Section 14: STEERING
PA1562
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1.2 INDEPENDENT FRONT SUSPENSION STEERING SYTEM DESCRIPTION
The steering system consists of the steering wheel and column assembly, a vane-type hydraulic pump,
reservoir, filter, interconnecting system lines and hoses, integral power steering gear and linkage (Fig. 2).
The steering linkage consists of tie rods connected to the bell crank and the steering arm at the left side
of the coach, and to the idler arm and steering arm at the right side of the coach. The bell crank and idler
arm are connected by a relay rod. A drag link connected to the bell crank and the pitman arm, which is
mounted to the steering gear, transfers the turning motion of the steering wheel to the steering arms.
Hydraulic components are added to transmit, increase and regulate steering control forces.
These elements are:
1. A vane type hydraulic pump; and
2. Hydraulic reservoir and hoses.
The steering gearbox is self powered and provides movement with power assistance to the left wheel.
Steering stability and tire wear are influenced by wheels, hubs, tires, air suspension, brakes, front
suspension and front end alignment which are all covered in their respective sections in this manual.
FIGURE 2: IFS STEERING SYSTEM SETUP
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