TUBE 1K0335 - Caterpillar

Table 1
Industry Grades of Steel    
S355J2G3 DIN (1) (2)10025 RST 52-3    
ASTM (3) 572 (Grade 42)    
ASTM 572 (Grade 50)    
JIS (4) G3106 (Grade SM490A)    
( 1 ) This is the grade of steel that is preferred.
( 2 ) Deutsche Industrie Norm (DIN)
( 3 ) American Society For Testing And Materials (ASTM)
( 4 ) Japanese Industrial Standard (JIS)Welding Requirements
Welding quality is critical to the success of the repair. All welds must be smooth and continuous. No undercutting is allowed. No overlapping is allowed. Grind the ends of the welds to a smooth radius.
Prepare the metal for welding. Refer to ""Preparation of the Metal for Welding"" in this instruction in order to properly prepare the metal for welding.
Use LB-26 Electrodes (AWS E7016 or AWS E7018) or the equivalent electrodes in order to weld the reinforcement plates to the frame assembly stabilizer. Also, basic welding wire EESAB OK may be used with a diameter of 1.2 mm (0.05 inch). The basic welding wire must be the equivalent to A5.20 E17T-5 of the American Welding Society (AWS) with positive polarity.
Welding of the grooves requires LB-52 (AWS E7018), or an equivalent electrode. Also, basic welding wire EESAB OK may be used with a diameter of 1.2 mm (0.05 inch).
All electrodes must be completely dry. The electrodes may be dried by heating the electrodes to 300 °C (572.0 °F). The electrodes must be dried for at least 30 minutes.
Do not weld in windy conditions. Do not weld when temperatures are below 16 °C (61.0 °F).
Penetration characteristics may vary greatly depending on the electrode diameter, the shielding gas, the welding current, and the thickness of the plate. The geometry of weld joints, the surface conditions, the composition of the base metal, and the electrode also affect the weld quality.
A root pass should be applied before each weld is finished.
For additional information concerning welding, refer to the Service Manual, SEBD0512, "Caterpillar Service Welding Guide".Preparation of the Metal for Welding
Cover all of the finished bores and all of the threads. Finished bores and threads must be protected from foreign material, gouging, and spatters of paint. Do not remove the protective covers from the finished bores or from the threads until the frame assembly stabilizer is painted.
Be sure to remove the grease, the water, the paint, the rust, the dirt, and the scale before welding. Any of these materials will discharge gas which will cause porosity in the welds deposit. Water and rust will cause hydrogen embrittlement. Hydrogen embrittlement causes cracks in the weld deposit.
Remove paint, rust, dirt, and scale with a wire brush, by buffing, or by grinding. Shot blasting of all work areas will also remove foreign material.
Use a Caterpillar approved solvent in order to remove any oil from the frame assembly stabilizer.
Use a Caterpillar approved solvent in order to remove any grease from the frame assembly stabilizer.Fabrication of the Reinforcement Plates
Illustration 1 g00823858
The dimensions for the fabrication of the reinforcing plates are shown in Illustration 1. The thickness of the