OM2044 Safety - Section 20 Page 20-21 7. DO NOT weld on the rear of the control cabinet! The metal panels on the back of the cabinet are part of capacitors and cannot be heated. 11. If the red lights on the exterior of the control cab- inet and/or the back wall of the center console continue to be illuminated after following the above procedure, a fault has occurred. 8. DO NOT weld on the retard grid exhaust lou- vers - they are made of stainless steel. Some power cable panels throughout the truck are also made of aluminum or stainless steel. They must be repaired with the same material or the power cables may be damaged.
Leave all cabinet doors in place; DO NOT touch the retard grid elements; DO NOT disconnect any power cables, or use them as hand or foot holds. 9. Power cables must be cleated in wood or other non-ferrous materials. DO NOT repair cable cleats by encircling the power cables with metal clamps or hardware. Always inspect power cable insulation prior to servicing the cables and prior to returning the truck to service. Discard cables with broken insulation. Notify your Komatsu service representative, immediately. Only qualified personnel, specifi- cally trained for servicing the A-C drive system, must perform this service. 10.
Power cables and wiring harnesses must be protected from weld spatter and heat. 12. Replace all covers and doors and place the GF cutout switch and battery disconnect switches in their original positions. Reconnect all har- nesses prior to starting the truck. Always fasten the welding machine ground (-) lead to the piece being welded; the grounding clamp must be attached as near as possible to the weld area. Leave the drive system in the rest mode until the truck is to be moved. Always avoid laying welding cables over or near the vehicle electrical harnesses. Welding voltage could be induced into the electrical har- ness and cause damage to components.
Never allow welding current to pass through ball bearings, roller bearings, suspensions, or hydraulic cylinders.