C13 and C15 On-highway Engines Caterpillar

Proper welding procedures are necessary in order to avoid damage to electronic controls. Perform welding on the engine according to the following procedure:

1. Turn the keyswitch to the OFF position.

2. Disconnect the negative terminal from the battery.

3. Disconnect the engine's electronic components from the wiring harnesses: ECM, actuators and sensors.

4. Protect the wiring harnesses from welding debris and/or from welding spatter.
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   NOTICE
   Do NOT use electrical components (ECM or sensors) or electronic component grounding points for grounding the welder.

5. Connect the welder's ground cable directly to the engine component that will be welded. Place the clamp as close as possible to the weld in order to reduce the possibility of welding current damage to the engine bearings, to the electrical components, and to other engine components.

6. Use standard welding procedures to weld the materials together.