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AXLE AR-DRIVE 0543605 - Caterpillar

0543605 AXLE AR-DRIVE Caterpillar parts AXLE
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Caterpillar 0543605 AXLE AR-DRIVE

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General Weld Repair
Using an Air-Arc torch, carefully remove all traces of the crack, ensuring that the full depth of the crack is removed. Check again using dye penetrant that all traces of the crack have been completely removed.
Grind the areas that were carbon-torched in Step 1 to remove all traces of carbon resulting from the Air-Arc process. The presence of traces of carbon can adversely affect the final repair weld quality. Prepare a V-groove of between 60 and 90 degrees included angle (depending on the depth of the groove) and the full depth of the crack to be welded, with the width of the base of the groove sufficient to allow comfortable access for the welding torch.
If the crack goes all of the way through the thickness the gap should be opened up enough to allow a back-up strip to be slid into the opening. The use of a back-up strip will ensure a fully penetration weld and good root fusion with the parent material. Attach a wire (MIG weld wire tacked to the center of the strip is one method) to the back-up strip and use the wire to pull the back-up strip tight to the back of the plate. For cracks that wrap around the corners of the tube a formed strip should be used. Multiple strips can be substituted if a formed strip is not available.
Pre-heat the repair area to a minimum temperature of 250 F, using a 349-4203 Infrared Thermometer temperature-measuring tool to check the temperature. Continue to measure the temperature throughout the repair process, and do not permit the temperature to drop below the prescribed value. If necessary, stop the welding process and re-heat the area.
Weld each bead in a straight fashion, with a minimum of weaving. Do not permit any weld bead width more than 5 mm (0.2 inch) Do not try to fill the complete width of the V-groove, even close to the base of the groove, with one pass of filler material. After welding each pass, remove the slag and needle peen the pass in order to stress relieve it.
After needle peening, carefully inspect the pass for any signs of lack of penetration, porosity, or undercutting. If any such signs are found, grind out a part or the entire affected pass until the quality is acceptable before continuing with the repair process.
Complete the welding process leaving the final surface of the repaired area about 3 mm (0.12 inch) higher than the general level of the surrounding area. Needle peen and grind the area to remove all traces of the individual weld beads until the repaired area is completely smooth and free of stress risers. Blend all repair welds into the general surface of the structure. Check the repaired area again with aerosol dye penetrant after completion of the weld process.
Cover the repaired area with thermal blankets to counter the effect of any wind, and allow the structure to cool slowly to ambient temperature. The cooling should not take place at

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