TUBE AS-FUEL RETURN 1W9271 - Caterpillar

Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Personal injury or death can result from fumes, gases and ultraviolet rays from the weld arc.Welding can cause fumes, burn skin and produce ultraviolet rays.Keep your head out of the fumes. Use ventilation, exhaust at the arc, or both, to keep fumes and gases from your breathing area. Wear eye, ear and body protection before working.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 cause death.Read and understand the manufacturer's instructions and your employer's safety practices. Do not touch live electrical parts.See "American National Standard Z49.1, Safety in Welding and Cutting" published by the American Welding Society.American Welding Society
2501 N.W. 7th Street
Miami, Florida 33125
See "OSHA Safety and Health Standards, 29 CFR 1910", available from U.S. Department of Labor.U.S. Department of Labor
Washington, D.C. 20210
Do not torch or weld on painted areas. The effect of gasses from burned paint is a danger to the person doing the cutting or welding.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Before you weld any parts, remove all of the following foreign material: grease, oil, water, paint, rust and dirt.Remove all oil and grease with solvent. Use a wire brush or glass beads to remove all other foreign materials.Disconnect the electrical wires of the head from the main connector on the machine.Replacing the Lower Wear Plate for HH44 DE Harvester Head
Lower Wear Plate
Illustration 1 g02796290
Cut the worn wear plate (1) with an air carbon arc. Grind the remaining welding material.
Weld a new wear plate onto the harvester head. Weld a 6 mm (0.24 inch) fillet weld completely around the new wear plate.
Grind all welds smooth. Prime all welded areas and paint all welded areas.