BAR-RH 9V9785 - Caterpillar

Read and understand the manufacturer's instructions and your employer's safety practices. Keep your head out of the fumes. Use ventilation, exhaust at the arc, or both, to keep fumes and gases from your breathing zone and general area. Wear correct eye, ear, and body protection. Do not touch live electrical parts.
See American National Standard Z49.1 "Safety in Welding and Cutting" published by the American Welding Society, 2501 N.W. 7th Street, Miami, Florida 33125: OSHA Safety and Health Standards, 29 CRF 1910, available from U.S. Dept. of Labor, Washington, D.C. 20408.
Welding operator personal protection should be provided to assure that total weld fume in the operators breathing zone does not exceed OSHA limits.All repair welding operators must be qualified for groove and fillet welding, as outlined the current ANSI/AWS D14.3. The qualification will be for the SMAW (Shielded Metal Arc Welding) process in the vertical welding positions. The welding operator must also have used this welding process during the last six months or be re-certified for this process before welding. Documentation must be maintained of the weld operators qualifications. The alternate process for this repair could be FCAW (Flux Cored Arc Welding).
The area to be welded and the surrounding area must be at a minimum temperature of 16° C (60° F) before and during welding.
Since weld distortion is a possibility, minimizing the heat is important.The SMAW process shall be used with E7018 (ANSI/AWS A5.5) welding electrode. The weld deposited by these electrodes will have the following minimum mechanical properties:
500 MPa (72 KSI) Tensile Strength420 MPa (60 KSI) Yield Strength22% elongation in 50 mm (2 in)27 J (20 ft lb) Notch Toughness at -29° C (-20° F)These are low hydrogen electrodes and must be stored in an electrode oven at 121° C (250° F) when not in use. If the electrodes get damp, scrap or recondition them to the manufacturer's specifications.
The following chart relates to the electrodes diameter and approximate current settings for welding:
Use the direct current electrode positive (DC reverse polarity) polarity