ENGINE AR-PRIMARY 2071145 - Caterpillar

Table 9
Model     (TT) mm    
G310B     2    
G315B     2    
G320B     4    
Illustration 17 g01103231
Preparing the bars for welding
Apply an 8 mm × 45° chamfer (M) to the top and bottom of the bars (C) .Installation Procedure For The Edge
Illustration 18 g01113980
Cut a strip of metal (K) to fit between the sideplates. The grade of this metal should be "St. 52-3". Refer to illustration 18 and table 10.
Table 10
Model     Dimensions of the Metal Strip    
G310B     15 mm × 50 mm    
G315B     15 mm × 50 mm    
G320B     15 mm × 60 mm    
Tack weld the strip of metal (K) onto the bars (C), side plates (B), and plates (D) .Note: The strip of metal (K) must be even with the inside of the shell.
Illustration 19 g01113737
Positioning the edge
Illustration 20 g01113991
Positioning the edge
Place the edge (A) into position. Refer to illustrations 19 and 20. Refer to table 11 for the correct dimensions.
Table 11
Model     (Uu) mm     (X) mm     (Y) mm    
G310B     10     121     937    
G315B     5     134     1040    
G320B     5     150     1150    
Tack weld the edge (A) to plate (D), side plates (B), and the strip of metal (K) .
Check the dimensions (Uu), (X), and (Y) of the edge. Refer to table 11. Refer to illustrations 19 and 20.
Illustration 21 g01103409
Weld specifications
Weld the metal strip (K) to the bars (C), plates (D), and side plates (B). Refer to illustration 21. Refer to table 12.
Table 12
Model     (Ww)
mm     (Pp)
mm     (Kk)
mm     (Li)
mm     (Mm)
mm    
G310B     6.5     9x     5     6     8    
G315B     9     11x     5     6     8    
G320B     8
1.5     12x     8     8     10    
Weld the edge (A) to the side plate (B) and to the metal strip (K). Refer to illustration 21. Refer to table 12.Note: The temperature of the bottom of the edge must not exceed 450 °C (842 °F) during welding.
Allow the welds to cool until the ambient temperature is reached.
Remove the metal strips (H) from both sides of the shells.
Remove the metal strips (G) that are tack welded to the inside of the shells.
Clean the grapple.
Paint the parts that need to be painted.
Install the cutting edge (E) onto the grapple. Refer to Service Manual, "Cutting Edge - Remove and Install".Torque Specifications
Table 13
Torque For Standard Fasteners
"Torque 10% Nm"    
Bolt Size     Quality of Bolt "8.8"     Quality of Bolt "10.9"     Quality of Bolt "12.9"    
"M10"     50     70     80    
"M12"     85     120     145    
"M14"     125     190     230    
"M16"     210     295     355    
"M20"     410     580     690    
"M24"     710     1000