390F MHPU Mobile Hydraulic Power Unit Machine Systems Caterpillar


Power Shift Pressure - Calibrate

Usage:

390F B37

简介

用于动力换档压力的比例减压阀位于主泵壳体上。 比例减压阀将降低的先导油压力传递到前泵和后泵的调节器。 后泵和前泵的输出流量根据动力换档压力进行控制。 动力换档压力通过机器 ECM 进行控制。

初步测试

测试和调整, "安全阀(先导)- 测试和调整"

所需工具




图 1g01623868

工具总成 "B"

198-4240 数字压力指示器总成

表 1
工具     项目     零件号     说明     数量    
B     198-4240     数字压力指示器总成        
    B1     198-4234     指示灯     1    
B2 198-4237     压力传感器
3447 kPa (500 psi)    
1    
B3 198-4236     加长电缆     1    

机器准备

  1. 将机器停放在水平地面上。

  1. 停止发动机。

  1. 释放液压系统压力。 请参阅测试和调整, "系统压力 - 释放".



    图 2g03795776

    泵室

    (1) 测压口(动力换档压力)

  1. 将一个 3447 kPa (500 psi) 压力传感器连接到动力换档压力测压口 (1) 上。

标定步骤

监视器步骤

  1. 起动发动机。

  1. 将液压油温度提高至 55°± 5°C (131°± 9°F)。

  1. 进入 "Service(维修)"菜单。

    1. 输入维修密码 "9992"。

  1. 选择 "Calibration(标定)"菜单。

  1. 选择 "Power Shift Pressure(动力换档压力)"。

  1. 遵循屏幕上的说明来完成标定步骤。

  1. 如果标定成功且没有错误发生,则显示屏将指示标定完成。

    注: 如果出现错误,监视器上将显示 "Error(错误)"。 标定流程将不会保存,并且流程必须重新开始。

ET 步骤

  1. 起动发动机。

  1. 将液压油温度提高至 55°± 5°C (131°± 9°F)。

  1. 选择"机器控制装置"的 ECM。

  1. 从 "Service(维修)"菜单中选择 "Calibrations(标定)"。

  1. 选择 "PRV - Power Shift Pressure(PRV - 动力换档压力)"并点击 "Start(开始)"按钮。

  1. 遵循屏幕上的说明来完成标定步骤。 点击 "Next(下一步)"按钮,以继续下一步骤。

  1. 如果标定成功且没有错误发生,则显示屏将指示标定完成。 点击完成按钮,退出或转至下一标定。

    注: 如果标定失败,将不保存标定。 点击 "Restart(重新开始)"按钮,尝试再次标定,或点击 "Finish(完成)"完成按钮,退出或转至下一标定。

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