STICK & BEARING AS 3988960 - Caterpillar

Illustration 12 g01418432
View of staggered welds
Preheat the adapters and the base edge to temperatures between 150° C (300° F) and 260° C (500° F). Assemble the adapter bevel (L) with hard contact against the base edge bevel (K). Equalize the gaps of the adapter straps. The minimum gap for equalization is 3 mm (0.12 inch) and must be equalized within 3 mm (0.12 inch) to the base edge (J). Use the spacers to hold the position while tack welding at mid length in the root of the j-groove on each side of the strap.Note: All weld start points, stop points and weld illustrations are general and should be considered identical for both the top and bottom straps. Minor variances can be allowed, depending upon component strap geometry unless otherwise specified on the base edge assembly drawings.Note: Factory and production variations in the weld starts and the weld stops for points (C) and (D) is permissible. Stagger the weld starts and stops when possible and consult a facility within process capabilities.Note: Weld zones must not exceed the Maximum interpass temperature of 260° C (500° F).
Begin the first weld bead at the front of the top strap weld groove root at point (A) or point (E). Weld one continuous pass to the beginning of the rear adapter arc at point (B) or (F). You can continue welding around the rear adapter arc at point (C) to (D). Stagger all of the weld stops and starts