CYLINDER AS 3980173 - Caterpillar

Rework Procedure to Update 278-8451 Hoist Lines Gp
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.
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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Personal injury or death can result without releasing all of the hydraulic pressure.Release all the pressure from the hydraulic system before any lines are disconnected.
Hot oil and components can cause personal injury.Do not allow hot oil or components to contact skin.
Use the following procedure to update the frame assembly with new block:
Move the machine to a smooth horizontal location. Move the machine away from any machines that are working and away from any personnel.
Move the transmission control to the NEUTRAL position. Stop the engine.
Permit only one operator on the machine. Either keep other personnel away from the machine, or keep other personnel in the sight of the operator.
Activate the parking brakes.
Place blocks in front of the wheels and behind the wheels.
Fully lift the dump body of the truck. Install retaining cable for the dump body.
Make sure that the transmission rotary selector spool is in the NEUTRAL position.
Illustration 2 g02551177
Remove weld boss (1) and mounting hardware (2). Discard the parts.
Illustration 3 g02551685
(A) Dimension 80.0 mm (3.15 inch) (B) Dimension 14.6 mm (0.57 inch) (C) Dimension 50.8 mm (2.00 inch) (D) Dimension 15.0 mm (0.59 inch) (E) Dimension 30.0 mm (1.18 inch) (F) Two through holes for diameter of 10.5 mm (0.41 inch). In each hole make M12 x 1.75 threads for a depth of 25.0 mm (0.98 inch). (G) Dimension 27.2 mm (1.07 inch) (H) Dimension 57.4 mm (2.26 inch) (J) Radius 203.2 mm (8.00 inch)
Fabricate block (3) to the dimensions as shown in Illustration 3.
Illustration 4 g02551277
(K) Distance 486.7 mm (19.16 inch) (L) Distance 148.7 mm (5.85 inch)
Weld block (3) to the frame assembly as per dimensions shown in Illustration 4.
Illustration 5 g02551716
Position grommet (5) and orient