| 摘要 |
<p>The hydraulic system has hydraulically switchable gear switch unit, a hydraulically switchable brake switch unit (8) and an activation device (3) for opening and closing of the brake switch unit. The gear switch unit and the brake switch unit are torque proof connected with a same shaft train. A safety valve (4) is arranged between the activation device and the brake switch unit. The brake switch unit is connected with the activation device after switch position of the safety valve. The safety valve is hydraulically operatively connected with the gear switch unit.</p> |
