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Welding near the components and lines of the LNG fuel system may damage the lines and components or cause gas to escape. Protect any lines and components from the debris and the spatter which is created from welding on the machine near the LNG fuel system. |
Do not weld on any protective structure or the LNG tank. If it is necessary to repair a protective structure or LNG tank, contact your Cat dealer.
Proper welding procedures are necessary in order to avoid damage to the electronic controls and to the bearings. When possible, remove the component that must be welded from the machine or the engine and then weld the component. If you must weld near an electronic control on the machine or the engine, temporarily remove the electronic control in order to prevent heat related damage. The following steps should be followed in order to weld on a machine or an engine with electronic controls.
- Turn off the engine. Place the engine start switch in the OFF position.
- If equipped, turn the battery disconnect switch to the OFF position. If there is no battery disconnect switch, remove the negative battery cable at the battery.
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NOTICE Do NOT use electrical components (ECM or sensors) or electronic component grounding points for grounding the welder.
- Clamp the ground cable from the welder to the component that will be welded. Place the clamp as close as possible to the weld. Make sure that the electrical path from the ground cable to the component does not go through any bearing. Use this procedure in order to reduce the possibility of damage to the following components:
- Bearings of the drive train
- Hydraulic components
- Electrical components
- Other components of the machine
- Protect any wiring harnesses and components from the debris and the spatter which is created from welding.
- Use standard welding procedures in order to weld the materials together.