TUBE AS 2852536 - Caterpillar

The dimension of the permanent steel, backing strip will depend on the configuration of the excavation.Every attempt should be made to accommodate a single, continuous strip that runs the full length of the weld joint. A 6.4 mm (0.25inch) thick by 38 mm (1.50 inch) wide by the required length are the typical dimensions required for most applications.The steel backing strip material can be any common structural steel such as ASTM A36. Attach wire (or other means) to the backing strip and insert through the root opening/gap and pull back flush to the inside of the plate surface.The thickness of the backing strip should be kept to a minimum to assist with the insertion process. The thicker the backing strip the more difficult it will be to insert through the gap into an enclosed cavity. A 6.4 mm (0.25 inch) thick backing strip is the minimum that should be used and is sufficient enough to prevent burn through using the welding parameters specified.Select a backing strip width that will ensure a minimum overlap of 3 mm (0.12 inch) of the backing strip to both sides of the weld joint along the entire length. Refer to Illustration 102. Minimize the gap (0 mm if possible) between the backing strip and the inside plate surface.
Inspect all welds visually to ensure that all weld quality meets or exceeds the requirements shown in the ""Weld Inspection and Acceptance Criteria"" Section.
Sand excess weld metal flush with surrounding base material. Use a 36 grit minimum sanding disk.Procedure to Remove and Reinstall the Hydraulic Tube Mounting Plate
Illustration 103 g03647248
Plate (Plate_002) (AA) 20 mm (0.80 inch) (BB) 200 mm (8.00 inch) (CC) 180 mm (7.00 inch) (DD) 20 mm (0.80 inch) (EE) 15 mm (0.60 inch) (FF) 30 mm (1.20 inch) (GG) 8.7 mm (0.34 inch) diameter M10x1.5 two placesNote: If needed use the dimensions in Illustration 103 in order to fabricate and tap a new 296-7803 Plate (Plate_002) using ASTM A6/A6M steel.
Illustration 104 g03647151
View of the right-hand side rear pedestal assembly (A) Plate
Illustration 104 indicates the area of the frame for which this procedure applies.
Illustration 105 g03647126
View of the right-hand side of the machine (A) Plate
Use a center punch through the threaded holes and mark the location of plate (A) and scribe lines to relocate plate (A) .
Illustration 106 g03647176
View of the right-hand side of the machine
Remove and retain plate (A) being careful not to gouge or grind into the parent material underneath the plate. Plate (A) will be reused.
Sand the excess fillet weld material flush with the surrounding parent material using a 36 grit minimum sanding disk.
Relocate plate (A) using the scribed lines and hole from Step 2.
Illustration 107 g03647220
View of the right-hand side of the machine (A) Plate (B) Weld point (C) Weld point
Tack and weld according to Illustration 107. Tack weld and weld only between weld point (B) and weld point (C). Weld point (B) and weld point (C) are 100 mm (4.00 inch) from the right edge of plate (A) .Only weld an 8 mm