Welding Precaution
正确的焊接程序对避免损坏 A6 电子控制模块 (ECM)（如果配备）、传感器和相关部件很有必要。 另外还应当考虑从动设备的部件。 拆下需要进行焊接的部件。 当在配备 ECM 的发动机上进行焊接而又不可能将部件拆下来时，必须遵循下述步骤。 此步骤对电子部件的危害程度最小。
- 停止发动机。 断开 ECM 的电源。
- 确保关断通往发动机的燃料供应。
- 从蓄电池上断开蓄电池负极电缆。 如果安装了蓄电池断路开关，应断开此开关。
- 从导线线束上断开所有电气部件。 电子部件包括以下部件：
- 从动设备的电气部件
- A6:E2 ECM
- 传感器
Show/hide table注意 切勿将电气零部件(ECM电子控制模块或电子控制模块传感器) 或电子零部件的接地点用作焊接机的接地点。
Show/hide table
图 1 g01143634 维修焊接指南（典型示图） - 可能时，将焊机接地夹直接连接到将要焊接的发动机部件上。 尽可能将夹子夹在焊接点附近。 就近连接可降低焊接电流损坏发动机轴承、电气部件和其他部件的可能性。
- 防止焊渣和/或焊接飞溅损坏线束。
- 采用标准焊接步骤将物料焊接在一起。
Caterpillar Information System:
C9.3B Engine General Information
G3500H Generator Set Engine Electrical Power Supply - Test
323F SA Excavator and 323F MHPU Machine Systems Engine Control
323F SA Excavator and 323F MHPU Machine Systems Electronic Control (Boom System)
G3512 Generator Set Engine Accessory Drive (Front) - Disassemble
323F SA Excavator and 323F MHPU Machine Systems Electronic Control (Machine System)
3500 and 3500B High Displacement Engines for Caterpillar Built Machines Water Pump - Disassemble
3500 and 3500B High Displacement Engines for Caterpillar Built Machines Water Pump - Assemble
Procedure to Install the Audio Visual Alarm on Off-Highway Trucks Equipped with Back Up Alarm {1408, 7400, 7402, 7407} Procedure to Install the Audio Visual Alarm on Off-Highway Trucks Equipped with Back Up Alarm {1408, 7400, 7402, 7407}
PM820, PM822, and PM825 Cold Planer Rotor Drive Clutch - Inspect
3500E Marine Engines Overhaul (Top End)
C175 Oil&Gas Offshore Engine Diagnostic Trouble Codes
C9.3B Aftertreatment Systems Electronic Service Tools
C9.3B Engine Service Information Report
C9.3B Engine Engine Monitoring System
C9.3B Engine Diagnostic Capabilities
C9.3B Engine Configuration Parameters
C9.3B Engine Acceleration Is Poor or Throttle Response Is Poor
C9.3B Engine Alternator Problem - Charging Problem and/or Noisy Operation
C9.3B Engine Battery Problem
C9.3B Engine Coolant Contains Fuel
C9.3B Engine Coolant Contains Oil
C9.3B Engine Coolant Level Is Low
C9.3B Engine Coolant Pressure Is Low