345D, 349D and 349D2 Excavators Hydraulic System Caterpillar


Operational Checks

Usage:

345D L BYC
操作检查可用来查找系统中的泄漏和工作不正常的部件。 连杆运动的速度或马达的扭矩可用来检查油缸、马达和泵的状况。

执行下列操作检查,以便诊断和排除有关机器的液压回路和部件的问题。

注: 以下运行测试应在 55° ± 5°C (131° ± 9°F) 的液压油温度下执行。

  • 测试和调整, "发动机性能 - 测试(发动机转速)"

  • 测试和调整, "在平地上行驶 - 测试"

  • 测试和调整, "在平地上行驶 - 测试(可选测试)"

  • 测试和调整, "机器在斜坡上的沉降 - 检查"

  • 测试和调整, "在平地上的回转速度和回转过量 - 检查"

  • 测试和调整, "在斜坡上的回转速度和回转漂移 - 检查"

  • 测试和调整, "油缸沉降 - 检查(空载铲斗)"

  • 测试和调整, "油缸速度 - 检查"

操作检查所用的表中列出的技术规范是经计算的平均值。 由于机器配置和发动机转速不同,这些数值也会不同。 表 1 列出了为获得这些技术规范而使用的机器配置。

参考有关发动机转速规格,请参阅测试和调整, "发动机性能 - 测试(发动机转速)"。

表 1
345D 和 349D 机器配置    
动臂     斗杆     铲斗    

6900 mm (22 ft 8 in)    

3350 mm (11 ft 0 in)    

1.9 m3 (2.49 yd3)    

表 2
345DL 和 349DL 机器配置    
动臂     斗杆     铲斗    

6900 mm (22 ft 8 in)    

3350 mm (11 ft 0 in)    

2.0 m3 (2.62 yd3)    

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