HUB 8P0769 - Caterpillar

All Machines And Engine Applications With Electronic ControlsSUPPLEMENT: NOVEMBER 3, 1997Service Magazine; October 6, 1997; Page 44; "Proper Welding Procedure On Machines And Engines With Electronic Controls".Disregard this article and see Service Magazine SEPD0389, Article 15, Page 14 with the same title.
--------------- END SUPPLEMENT ---------------Proper welding procedures are necessary to avoid damage to electronic controls. The Following steps should be complied with when welding on any machine or engine with electronic controls.
1. Turn off the engine and put the key start switch in the off position.2. Disconnect the negative battery cable at the battery or if the machine or engine has a battery disconnect switch, open the switch. This is the position for machine service or storage.3. Connect the welder ground cable directly to the actual machine member to be welded. Place this clamp as close as possible to the weld to reduce the possibility of welding current damage to the drive train bearings, hydraulic components, electrical components like cab ground straps and other machine components.
DO NOT use electrical components (ECM's sensors) or electronic component ground points for grounding the welder.
4. Protect any harnesses from welding debris or spatter.5. Use standard welding procedures to weld the materials together.