PLATE 8A2376 - Caterpillar

Illustration 13 g01043407
Note: If a crack is not visible continue to remove material from the weld for the twister resister. Use air arc gouging to start from the 4 o'clock position until you reach the 8 o'clock position.
Use air arc gouging in order to remove a 10 mm (0.40 inch) deep section (D). The section must be the entire length of the crack. Refer to Illustration 13 for reference.Note: Make sure that you do not remove the weld all the way through the weld. The opposite side will be repaired later in this Special Instruction.
Illustration 14 g01043420
Weld the root pass directly in the affected areas. Continue to weld passes until the weld is built up to the original size. Refer to Table 2 for the correct welding parameters.Note: Allow each pass to cool completely. You may blow air on the weld in order to increase the cooling rate. Do not rush through the process. The bore (3) for the twister resister may be distorted if you do not allow each pass to cool completely.
Illustration 15 g01043426
Install backup strips (4) on the three sides of the outer side sheet (2). Tack weld the backup strips (4) in place. Make sure that the backup strips (4) overlap the underside of the side sheet (2) .Note: Fabricate backup strips from 1 inch by 1/4 inch material.
Illustration 16 g01043430
Tack weld access plate (1) in place on the side sheet (2) .Note: Make sure that plate (1) is flush with side sheet (2) .Note: Make sure that there is a 2 mm (0.8 inch) gap between the sides of the plate (1) and the side sheet (2) .Note: It may be necessary to create a 30° bevel on the edges of the plate in order to promote better weld penetration.
Illustration 17 g01043443
Weld access plate (1) in position.Note: You may blow air on the bore for the twister resister in order to increase the cooling rate. Allow the material to cool before completing each pass in order to prevent distortion of the bore (3) for the twister resister.Note: If your weld around the twister resister is only cracked internally skip Step 9 through Step 10.
Illustration 18 g01043445
For external cracks, use air arc gouging in order to remove a 10 mm (0.40 inch) deep section (E) around the bore (3) for the twister resister. The section must be the length of the crack.Note: Make sure that you do not remove the weld all the way through the weld. The opposite side will be repaired later in this Special Instruction.
Illustration 19 g01043447
Weld the root pass directly in the affected areas. Continue to weld passes until the weld is built up to the original size. Refer to Table 2 for the correct welding parameters.Note: Allow each pass to cool completely. You may blow air on the weld in order to increase the cooling rate. Do not rush through the process. The bore (3) for the twister resister may be distorted if you do not allow each pass to cool completely.Procedure to Repair the Internal