5. STEERING SYSTEM
(3) When steering wheel is turned clockwise When the steering wheel is turned clockwise, the worm shaft ② moves upward, closing the gaps, B and D while widening A and C, so that the oil from the pump flows through the gap C to the power cylinder cap. The oil returning from the power cylinder tail flows through the gap A into the tank. The subsequent operation is the same as described in step (2). Upward
Fig. 5.5 Clockwise Rotation
5.1.3 POWER CYLINDER The power cylinder is a double-acting piston type, the cylinder tail being fitted to the frame and the rod side to the steering axle center arm. The power cylinder is controlled by the control valve in the steering gear box. When the steering wheel is turned counterclockwise, oil pressure is applied to the cylinder tail side and when the steering wheel is turned clockwise, it is applied to the cylinder cap side.
①
②
③
1. BALL JOINT 2. NUT 3. PISTON 4. PACKING
④
⑤
⑥
⑦ ⑧ ⑨
⑩
5. CYLINDER 6. ROD 7. "O"-RING 8. BUSHING
Fig. 5.6 Power Cylinder
- 69 -
⑪
⑫
9. CAP 10. PACKING 11. PACKING 12. BALL JOINT
