| 摘要 |
PURPOSE:To improve the operability by relieving the pressure oil in a speed change passage with an inching valve so that a car can be run intermittently or at a low speed. CONSTITUTION:The pressure oil from an oil hydraulic pump 4 is divided in three directions, one of which leads to an auxiliary speed change oil hydraulic control valve E through an inching valve G, the second leads to the first relief valve 86, accumulator 88, and quick return valve 75, and the last is then branched into left and right steering spools 56, 57. When the steering spools 56, 57 are slid, the pressure oil to advancing/receding spools 54, 55 is fed or cut off, thereby the steering can be performed while the advancing/receding of left and right swing shafts are stopped. |
