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


Cylinder Drift - Check - Loaded Bucket

Usage:

345D L BYC
注: 发动机转速和 / 或测试期间所用的机器配置可能对测试结果产生影响。 有关此项测试所用的发动机转速,请参阅测试和调整, "发动机性能 - 测试(发动机转速)"。 有关此项测试所用的机器配置,请参阅测试和调整, "操作检查"。

注: 执行操作检查之前,必须根据卸压阀压力技术规范设定卸压阀压力。 请参阅测试和调整, "技术规范"。

表 1
所需工具    
说明     数量    
卷尺     1    
秒表     1    



图 1g00298378

  1. 将机器停放在水平地面上。 请参阅插图 1。

  1. 装载铲斗。

    铲斗装载重量

    345D 和 349D ... 2400 kg (5290 lb)
    345D L 和 349D L ... 2550 kg (5620 lb)

  1. 提升动臂,直到顶部斗杆销和底部斗杆销在同一高度。

  1. 将铲斗油缸完全伸出。

  1. 将斗杆油缸完全回缩。

  1. 将斗杆油缸连杆从完全收回位置伸出 70 mm (2.8 in)。

  1. 测量每个油缸上油缸销之间的长度。

  1. 关闭发动机。

  1. 将机器停放在此位置三分钟。 测量每个油缸上油缸销之间的长度,求得油缸沉降。

表 2
油缸沉降(负载铲斗)    
项目     新机     翻新     维修极限    
动臂油缸    
6.0 mm (0.24 in) 或更小    

12.0 mm (0.47 in) 或更小    

24.0 mm (0.94 in) 或更小    
斗杆油缸    
12.0 mm (0.47 in) 或更小    

18.0 mm (0.71 in) 或更小    

30.0 mm (1.18 in) 或更小    
铲斗油缸    
30.0 mm (1.18 in) 或更小    

45.0 mm (1.77 in) 或更小    

75.0 mm (2.95 in) 或更小    

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