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


Travel on Level Ground - Test

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 1g00296317

    (A) 初步运转 5 m (16.4 ft)

    (B) 行驶距离 20 m (65.6 ft)

    (C) 铲斗高度 0.5 至 1 m (1.6 至 3.3 ft)

  1. 行驶距离至少必须为 25 m (82 ft)。 行驶测试地面必须坚硬且尽可能水平。

  1. 在行驶测试地面上画一条 25 m (82 ft) 长的直线作为参考线。

  1. 起动发动机。

  1. 将机器控制置于以下设定:发动机转速旋钮 "10" 和 AEC 开关关闭。

  1. 将液压油温度提高至 55°± 5°C (131°± 9°F)。

  1. 铲斗应空载。

  1. 安置机器,使一条履带与参考线平行。 将机器停放在行驶测试位置。 请参阅插图 1。

  1. 将行驶速度控制开关置于高速位置。

  1. 同时操作机器的两个行驶操纵杆使机器移动。

  1. 前 5 m (16.4 ft) 用于进行初步运转。 测量驶完剩余的 20 m (65.6 ft) 需要的行驶时间。 测量每个方向所需的时间。

  1. 测量距离参考线的行驶偏差。

  1. 将行驶速度控制开关置于低速位置,然后重复步骤 9 至 11。

表 2
行驶时间(秒)    
行驶速度     新机     翻新     维修极限    
HIGH(高速)     前进     16.8 或以下     18.8 或以下     22.3 或以下    
后退
LOW(低速)     前进     22.3 或以下     25.8 或以下     29.3 或以下    
后退

注: 下表显示距离参考线的行驶偏差(距离)。

表 3
行驶偏差
mm(in)    
行驶速度     新机     翻新     维修极限    
HIGH(高速)     前进     800(31.5)或以下     1200(47.2)或以下     1500(59.1)或以下    
后退
LOW(低速)     前进     800(31.5)或以下     1200(47.2)或以下     1500(59.1)或以下    
后退

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