VALVE GP-SEQUENCE 1900264 - Caterpillar

Obtain two strips of steel that are strong enough to hold the hooks in position.
Fit the new hooks into the proper quick coupler. Measure the new hooks. Ensure that the hooks are properly aligned in the coupler. The new hooks must be perpendicular to the bottom of the coupler.
After you have aligned the hooks, tack weld the strips of steel to the hooks. The strips must be positioned in order to keep the hooks aligned.
Carefully move the hooks to the work tool.
Illustration 7 g01127484
Position the hooks on the work tool.
Place the straight edge (2) from the cutting edge to the top edge of the bucket. The reference line (3) must be parallel to the straight edge (2). If necessary, grind the material from the bottom edge of the hooks.
Tack weld the hooks into position.
Illustration 8 g01127488
Place rod (8) into the hook of the new hooks. Clamp the rod into position.
Visually check the alignment of the rod with the lower edge of the work tool. The rod must be parallel with the cutting edge of the bucket. Check the alignment in at least two places.
Measure distance (D) from the cutting edge to the rod. Measure distance (D) at both ends of the rod. The dimension at distance (D) between the cutting edge and the rod must be the same dimension at both locations. If the dimension of distance (D) between the cutting edge and the rod is not the same dimension at both locations, move one hook.
Illustration 9 g01127490
Note: Before you weld the hooks in place, preheat the entire hook to 200° C (392° F) using a propane torch or oven. Allow to cool slowly. Use heat blankets to slow the cooling if necessary.
Weld the hooks into position. Refer to Table 4 for the size of the weld.
Table 4
Size of the Weld    
Part Number of the Hook     Size of the Weld    
183-6979, 183-6985    
6 mm (0.2 inch)    
183-6980, 183-6986    
8 mm (0.3 inch)    
183-6981, 183-6987    
10 mm (0.4 inch)    
183-6982, 183-6988    
12 mm (0.5 inch)    
183-6883, 183-6989    
15 mm (0.6 inch)    
Illustration 10 g01127491
Cut the two lower lips (9) from the excess material from the hooks.
Illustration 11 g01127493
Machine the bevels on the hook and on the lip. Refer to Table 5 for the proper angle.
Table 5
Angle of the Bevel    
Part Number of the Hook     Angle (E)    
183-6979, 183-6985     60°    
183-6980, 183-6986     60°    
183-6981, 183-6987     60°    
183-6982, 183-6988     60°    
183-6883, 183-6989     60°    
Weld the lower lip into position.
Allow the welds to completely cool.
Remove the strips of steel from the hooks.
Remove all of the debris from the welding. Paint the area that was welded with primer.
Allow the primer to completely dry. Finish the areas with a final coat of paint.