Relief Valve (Implement Pilot) - Test and Adjust
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机器的突然移动或意外起动会对机器上或附近的人员造成人身伤亡。 为了防止人身伤亡,进行以下操作: 将机器放在光滑、水平的表面上。 将作业机具降至地面,并接合停车制动器。 停止发动机,拔下钥匙。 锁止车轮并安装转向机架锁。 |
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所需工具     | ||
零件号     | 说明     | 数量     |
8T-0850     | 压力表     | 1     |
1U-5482     | 压力适配器总成     | 1     |
先导油系统向主机具控制阀上的先导控制阀供油。 先导控制阀允许先导油移动主控制阀滑阀。 补偿阀的开启将允许铲斗浮动。 先导油也用于移动行驶控制系统内的分流阀。 先导油还流过机具泵上的执行器阀,以便控制泵排量。
先导油泵安装在可变排量活塞泵(右侧)上。 先导安全阀控制先导油系统的压力。 先导安全阀位于右侧机架内。
- 连接转向机架锁连杆。
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图 1 | g01469853 |
机具供油诊断板 (1) 先导供油压力测压口 |
- 将 8T-0850 压力表 (4000 kPa (580 psi))连接至歧管上的测压口 (1) 。
- 接合停车制动器。
- 将变速箱挂入空档。
- 起动发动机。 将液压油预热到大约为 49 至 65°C (120 至 150°F) 的正常工作温度。
- 在发动机低怠速运行的同时,记录仪表读数。
- 先导油压应当为 3500 ± 150 kPa (508 ± 22 psi)。
- 如果先导压力不正确,必须调整先导安全阀的设置。
- 松开锁紧螺母 (3) 。
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图 2 | g01448010 |
右侧机架 (2) 先导安全阀 (3) 锁紧螺母 (4) 先导压力调整螺钉 |
- 顺时针转动调整螺钉 (4) 以增加先导压力。
- 拧紧锁紧螺母 (3) 。
再次执行测试和调整, "安全阀压力(先导)- 测试和调整",以便确认新的压力设置。
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