SUPPORT GP-ENGINE 2507017 - Caterpillar

Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.Problem
A crack may appear in the weld of the bosses on the frames Caterpillar hydraulic pin grabber quick couplers.Solution
If the welds for the bosses have cracks, use the information that follows in order to repair the cracks.Weld Specifications and Qualifications
Protect yourself and others; read and understand this warning. Fumes and gases can be dangerous to your health. Ultraviolet rays from the weld arc can injure eyes and burn skin. Electric shock can kill. Read and understand the manufacturer's instruction and your employer's safety practices. Keep your head out of the fumes. Use ventilation, exhaust at the arc, or both, to keep fumes and gases from your breathing zone and the general area. Wear correct eye, ear and body protection. Do not touch live electric parts.Refer to the American National Standard Z49.1, "Safety in Welding and Cutting" published by the American Welding Society, 2501 N.W. 7th Street, Miami, Florida 33125: OSHA Safety and Health Standards, 29 CFR 1910, available from U.S. Dept. of Labor, Washington D.C. 20210.
Welders must be qualified for fillet welding and groove welding. The welder must be qualified in different welding angles. The angles are vertical, horizontal, etc. The welders should be qualified in the use of the welding processes that follow: Shielded Metal Arc Welding (SMAW), Flux Cored Arc Welding (FCAW) and Gas Metal Arc Welding (GMAW). Refer to ISO 9606 or "American National Standards Institiute (ANSI)/American Welding Society (AWS) Specification D1.1, or Specification D14.3" for information that regards the qualifications for the processes that follow: SMAW process, FCAW process and GMAW process. The welders must have used the process at some time within the last six months. The welders must complete the process of certification if the welders have not used the welding processes for six months.Prepare the Area for Welding
Clean the area that will be welded. Make sure that the substances that follow are removed from the area that will be welded.
Oil
Grease
Paint
DirtIf the temperature of the base metal is below 0 °C (32 °F), heat the base metal to a temperature of at least 21 °C (70 °F). Maintain the temperature of the base metal at 21 °C (70 °F) during the welding process.Note: Heat distortion of the base metal is possible when you weld. Avoid excessive heating of the base metal. A maximum interpass temperature of 260 °C (500 °F) should be observed.Attach the welding ground cable directly to the base metal. Protect machined surfaces from sparks. Protect the machined surfaces from the weld splatter.Repair Procedure
Illustration 1 g01276460
Example of cracked weld
The weld around each boss should be inspected for cracks. If a crack in the weld is suspected then the paint in that area should be removed. Use penetrating dye and confirm the location of the