HOSE 2930750 - Caterpillar

Weld Specifications
Flux Cored Welding Electrode for the FCAW Process
The table that follows lists the mechanical properties of welds that are deposited by the flux cored welding electrode.
Table 1
Mechanical Properties from Flux Cored Welding Electrode That Is Classified as "ANSI/AWS A5.20 E71T-1" (1)    
Tensile Strength     480 MPa (69618 psi)    
Yield Strength    
400 MPa (58015 psi)    
Elongation     22%    
Impact Toughness     27 J @ -18 °C (20 ft lb @ -20 °F)    
( 1 ) The properties that are listed are for three passes of the welding electrode.The table that follows shows setting for the welding current for the flux cored welding electrode that has a diameter of 1.3 mm (.051 inch).
Table 2
Welding Current for Flux Cored Welding Electrode That Is Classified as "ANSI/AWS A5.20 E71T-1"    
Wire Feed Speed    Voltage    Amperage    
Minimum
5080 mm (200 inch) Per Minute     24     210    
Optimum
6985 mm (275 inch) Per Minute     28     250    
Maximum
8255 mm (325 inch) Per Minute     29     300    Note: The settings for the welding current can vary due to the position of the weld. Also, the settings for the welding current can vary with the manufacturer of the welding electrode.Use a polarity setting of DC reverse polarity. Remove the slag after each pass of the welding electrode. The fast freezing characteristics of flux cored welding electrode increases the possibility of evolving gas that is trapped in the weld. Control the size of the weld in order to reduce the possibility of evolving gas that is trapped in the weld. The volume of the fillet weld should not exceed 8.0 mm (.315 inch).Weld Inspection
The weld should not have any of the conditions that follow:
Cracks
Porosity
Undercut
Incomplete FusionIn order to verify the quality of the weld, refer to"American National Standards Institute (ANSI)/American Welding Society (AWS) Specification D14.3".Refer to Special publications, SEBD0512, "Caterpillar Service Welding Guide" for the correct welding procedures.Weld the Bore
Illustration 1 g01044601
Use an even spiral pass (W1) to cover the entire surface of the bore. The overlap of the welds should be one-third of the weld width. Do not overheat the bore. Overheating the bore causes poor control of the weld puddle.
Remove all slag and flux between passes.
Fill all craters at the stopping points and at the starting points. Blend grind with a die grinder, as needed.
Add a second pass or add a third pass in order to provide enough material for machining.
Illustration 2 g01026400
Illustration 3 g01026373
Section A-A
Machine the bore. Refer to Illustration 2, Illustration 3, and Table 3.
Table 3
Sales Model     Pt. No. of Steering Box     R     S     T    
784/785     5T-8671    
95.263 0.025 mm (3.7505 0.0010 inch)
2 Holes (1)    
2.5 0.5 mm (0.0984