RING-RETAINING 5D6792 - Caterpillar

Illustration 1. Location of cracks in cross beam.If the upper cross beam has cracks, use the procedure which follows to make repairs.
1. Remove 76.2 mm (3") of material from the ends of reinforcement plates as shown in Illustration 2.2. Use an arc-air torch to cut the cracks to a "V" shape. Make all welds with E7018 electrodes.3. Weld the cracks; then grind them flat. Remove all weld spatter (debris).4. Fabricate a reinforcement plate from high strength structural steel [289 800 kPa (42,000 psi) minimum yield] which is 12.7 mm (.50") thick. Make the plate 177.8 × 568.3 mm (7.00" × 22.38") with 30° chamfer on each end. Check the fit of the plate. There must be 3.18 mm (.125") of clearance between each end of the fabricated plate and the existing reinforcement plates. See Illustration 3, View A-A.5. Install the reinforcement plate as shown in Illustration 3.
Illustration 2. Location and modification of vertical reinforcement plates.
Illustration 3. Installation of reinforcement plate.