TUBE 1F5196 - Caterpillar

Procedure To Improve Bucket Assemblies
The illustrations used in this procedure are shown on a typical bucket illustration. The pictures are not identical to the bucket identified above. Use either 2.36 mm (.093 in) low hydrogen stick electrodes or 2.36 mm (.093 in) low hydrogen wire electrodes (mig welding process).1. Remove the current cutting edge.2. Notch the bucket at the side wear plates and remove material in a 38 by 120 mm (1.5 by 4.7 in) area from the entire edge of the bucket shell as shown in Illustration 1.
Illustration 1. Remove the material in the shaded area. (A) 38 mm (1.5 in). (B) 120 mm (4.7 in). (C) 13 mm (.5 in) radius. (D) Shell of bucket.3. Position the new edge assembly against the side plates and the shell of the bucket. Trim any excess material from the bucket to make sure there is a close fit. Tack weld the edge assembly in position. Make sure the side adapters and the side plates are correctly fitted before welding. See Illustration 2 for the correct fit.
Illustration 2. Position of cutting edge to side plates. (E) New cutting edge. (F) Side plate. (G) 3.0 mm (.12 in) minimum on both sides.4. Weld tie bars across the hinge plates to maintain the alignment of the bucket bores. Position the tie bars so that the stick nose will fit between the tie bars. Use the stick nose to aid in the assembly process and the welding. Illustration 3 shows a typical position for the tie bars.
Illustration 3. Tack weld tie bar (H) across the hinge plate before the finish welding process.5. Preheat the cutting edge to a temperature of 232 C° (450 F°). Maintain a minimum of 149 C° (300 F°) while performing the weld process. Follow the weld steps with the locations that are identified in Illustrations 4 and 5.
Illustration 4. (J) Weld for edge assembly to inside shell. (K) Weld for side plate to edge assembly. (L) Weld for adapter to edge assembly.
Illustration 5. (M) Weld for the back side of cutting edge to outside of shell.6. Weld the edge assembly to the inside of the shell with a 16.0 mm (.62 in) minimum bevel groove weld (J). Weld the back side of the cutting edge to the shell with a 10 mm (.4 in) minimum fillet weld (M).7. Weld the side plate to the edge assembly with a 16.0 mm (.62 in) fillet weld (K).8. Weld the adapter to side plate connection with a 19.0 mm (.75 in) bevel weld (L). Complete this weld with a 25 mm (1.0 in) fillet weld all around.
Illustration 6. Section view showing all weld locations.9. Allow the bucket to cool to ambient temperature before removing the tie bars from the bucket bores.10. Assemble the bucket to the stick.