BOLT-SPRING 3960018 - Caterpillar

Weld Repair of Rim Assembly
Illustration 3 g02297153
Inspect these areas for cracks (1) Cracked areas
Check the flange flatness by laying the gutter end of the rim flat on a machining plate. Then measure the distance to the outer and inner edges of the area machined on the flange. Mark the spots measured and note the measurements taken.
Inspect the rim with ultrasonic equipment and/or a dye penetrant (SNT-TC-1A specifications for personnel and operation) to insure all cracks are located. Mark the length of the cracks with a permanent marker. If no cracks are found, go to Step 9 of the following procedure.Weld Repair Procedure
Note: This procedure requires repair welders certified for flux cored arc welding process and submerged arc welding as outlined in American Welding Society (ANSI/AWS D1.1) specifications covering the appropriate welds.
Operator should avoid welding painted surface. Fumes generated by burning paint are harmful.
Use a carbon arc torch to gouge the rim. On the flange side of the rim, begin gouging 25 mm (1.0 inch) beyond the crack. Go to a depth of 6 to 10 mm (0.2 to 0.4 inch), as shown in Illustration 4. Move toward the center of the crack length, stopping at the middle of the crack. Repeat this sequence from the opposite direction.
Illustration 4 g02297175
(2) Gouge crack
Gouge the crack to a depth of 6 to 10 mm (0.2 to 0.4 inch). Grind, chip, and wire brush the weld groove to remove all of the slag and oxidized material. The weld groove must be clean to give a satisfactory weld. Measure in from the rim edge (where the snap ring fits) to determine where the crack is located with respect to the edge of the rim. This dimension will be used again in Step 4.
Use an AWS E71T-1 Flux Cored Welding Wire with an appropriate shielding gas to fill the weld groove as shown in Illustration 5. Use a 1.3 to 1.6 mm (0.05 to 0.06 inch) diameter electrode for this application. Remove all weld slag.
Illustration 5 g02297177
(3) Gouge filled with weld
Using the dimension found in Step 2, measure from the edge of the rim on the outside surface of the rim (the surface covered by the tire) to locate the crack on this side of the rim. This measurement and the heat mark from the weld pass in Step 3 will show the location of the crack defect. Back gouge to the root of the weld that was applied in Step 3 (use the carbon arc method as explained in Step 1). All traces of the crack should be removed in this operation. Refer Illustration 6 for the result of this operation.
Illustration 6 g02297193
Back gouge to the root of the first weld (4) Back gouge remaining crack
Grind, chip, and wire brush the weld groove to remove all of the slag and oxidized material.
Weld the groove as outlined in Step 3 and grind flush as shown in Illustration 7.
Illustration 7 g02297194
Grind the weld until flush with the rim surface (5) Weld and grind smooth
Finish welding the flange side of the