SEAL-WIPER 1672473 - Caterpillar

Table 2
Sizes of Bevels and Sizes of Welds    
Model    B1    W1    W2    W3    W4    W5    
776, 776B, 776C, 776D, 777, 777B, 777C, 777D    
8 mm (0.3 inch)    
12.0 mm (0.47 inch)    
25.0 mm (0.98 inch)    
8 mm (0.3 inch)    
12.0 mm (0.47 inch)    
25.0 mm (0.98 inch)    
784, 784B, 784C, 785B, 785C,    
10 mm (0.4 inch)    
12.0 mm (0.47 inch)    
25.0 mm (0.98 inch)    
10 mm (0.4 inch)    
12.0 mm (0.47 inch)    
25.0 mm (0.98 inch)    
789, 789B, 789C    
10 mm (0.4 inch)    
12.0 mm X 20 mm (0.47 inch X 0.8 inch)    
20 mm (0.8 inch)    
10 mm (0.4 inch)    
12.0 mm X 20 mm (0.47 inch X 0.8 inch)    
20 mm (0.8 inch)    
793, 793B, 793C    
10 mm (0.4 inch)    
12.0 mm X 20 mm (0.47 inch X 0.8 inch)    
20 mm (0.8 inch)    
10 mm (0.4 inch)    
12.0 mm X 20 mm (0.47 inch X 0.8 inch)    
20 mm (0.8 inch)    
Order a new bracket assembly. See Table 1.
Illustration 1 g00883071
Remove the casting (1). Use air carbon arc to gouge the fillet welds (A) from the outside corners. Gouge the fillet welds (B) from the inside corners. Protect the bores from sparks or from grinding material during the removal procedure. Also protect the bores during the cleanup procedure. See Illustration 1. Remove the cast bracket from the bracket assembly. Do not cut into the casting with the gouging rod.Note: The remaining plate steel will not be needed for this repair.
Once the cast bracket is removed from the bracket assembly, clean the casting by removing all existing weld deposits with a grinder.
Illustration 2 g00883201
Machine the bevel or grind the bevel (B1). The angle of the bevel is 45 degrees. See Table 2 for the size of the bevels.Removal of the Worn Bracket
Note: Be sure to protect all surfaces from sparks and grinding grit.
Remove all hydraulic lines and steering cylinders from the area around the existing bracket assembly.
The center arm will also need to be removed.
Illustration 3 g00883260
Scribe a line (L1) from the center of the bore across the top of the bracket assembly. Make a center punch on top of the bracket assembly. This will be used to locate the new bracket.
Illustration 4 g00883267
Remove the worn bracket. Cut along line (C1) .Note: For the weld seams (W2), angle the air carbon arc torch straight down in order to remove the weld deposit. Use caution so that the cast backup is not cut.Note: The top and bottom seams are fillet welds (W1). The weld joints on the sides of the bracket are J-groove welds with a backup casting (W2). Refer to Table 2 for the size of the welds.
Clean the J-groove welds that are on the sides of the support castings. Do not gouge the cast backup strip. Clean the top of the bracket assembly