Relief Valve (Secondary Steering Main) - Test and Adjust
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所需工具     | 数量     |
8T-0860 压力表 ( 40000 kPa (5800 psi))     |
1     |
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如果有人被困在车轮和车架之间,可能会发生人身伤亡。 转向系统由液压控制,运动时,车轮可能挤压人员。 当在车轮和车架之间工作时,一定要小心。 如果必须转向车轮,在进行任何移动前,确保所有人员远离机器。 |
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图 1 | g00527207 |
(1) 辅助转向和制动器分离电驱动泵 (2) 辅助转向主安全阀的螺塞 |
辅助转向和制动器分离电驱动泵位于前保险杠后面。
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图 2 | g00513935 |
辅助转向和制动器分离控制器在驾驶室中的位置 |
- 高怠速运行发动机。 向左或向右转动方向盘,直到接触转向油缸挡块。 之后,紧靠挡块继续转动方向盘。 将方向盘固定到此位置 3 秒后松开方向盘。 继续执行此步骤,直到转向系统内的油温达到至少 38 °C (100 °F)。
- 关闭发动机。
- 轮子前后都塞上垫块。
- 将停车制动控制器移到断开位置。
注: 当停车制动控制器处于接通位置时,车轮制动器的摩擦力将不允许辅助转向系统将车轮一直转至转向油缸停止。
- 将 8T-0860 压力表 40000 kPa (5800 psi) 安装在转向系统的测压口 (SS) 。 测压口 (SS) 位于右前悬架油缸后面的转向单向阀和安全阀 (3) 上。
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图 3 | g00527211 |
(3) 转向单向阀和安全阀 (SS) 转向系统测压口 |
- 使用驾驶室中的辅助转向和制动器分离控制器,以操作辅助转向和制动器分离电驱动泵 (1) 。
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注意 |
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为了把蓄电池耗电降到最小,把开关置于手动(MANUAL)位置的时间足够测试辅助转向即可。 测试完成后立即把开关返回到自动(AUTO)位置。 |
- 检查压力表上的压力读数。 辅助转向主安全阀的压力设定值为 15150 ± 300 kPa (2200 ± 45 psi)。
- 如果压力需要调整,拆下辅助转向主安全阀的螺塞 (2) 。 利用螺塞后面的设定螺钉更改压力设定值。
- 利用内六角扳手顺时针转动设定螺钉 1/4 圈,以升高压力。 逆时针转动设定螺钉 1/4 圈,以降低压力。 设定螺钉 1/4 圈,压力变化约为 1288 kPa (185 psi)。
- 重复步骤 6 到 9,直到压力设定值正确为止。
- 更换辅助转向主安全阀的螺塞 (2) 并拆下仪表。
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