M312 Excavator Machine System Caterpillar


Boom - Fore Boom

Usage:

M312 6TL



Illustration 1g03398289

Table 1
Specification for 123-8930 Fore Boom Gp    
Item     Qty     Part     Specification Description    
All bores must be free of paint. Use the 5P-0960 Grease Cartridge in order to coat all bores for pins, the stub boom, the stick, and the cylinder pin bores.    
1     1     172-5863 Pin As     Diameter is 59.850 ± 0.025 mm (2.3563 ± 0.0010 inch).    
2     2     139-6830 Bushing     Bore of the bushing before assembly is
70.23 ± 0.02 mm (2.763 ± 0.001 inch).    
3     1     172-5855 Pin As     Diameter is
69.950 ± 0.025 mm (2.7539 ± 0.0010 inch).    
4     1     150-4699 Pin As     Diameter is
69.850 ± 0.025 mm (2.7501 ± 0.0010 inch).    
5     2     093-0118 Shim     As required, use the shim of thickness
2.0 mm (0.08 inch) to adjust maximum lateral clearance of
1.0 mm (0.04 inch).    
6     As required, use the following shims to adjust a maximum lateral clearance of
1.0 mm (0.04 inch):    
1 093-0065 Shim     Thickness is
1.0 mm (0.04 inch).    
1 099-7091 Shim     Thickness is
1.5 mm (0.06 inch).    
7     As required, use the following shims to adjust a maximum lateral clearance of
1.0 mm (0.04 inch):    
1 133-2424 Shim     Thickness is
0.5 mm (0.02 inch).    
1 093-0086 Shim     Thickness is
1.0 mm (0.04 inch).    
8     As required, use the following shims to adjust a maximum lateral clearance of
1.0 mm (0.04 inch):    
1 093-0086 Shim     Thickness is
1.0 mm (0.04 inch).    
1 7Y-2496 Shim     Thickness is
1.6 mm (0.06 inch).    
9     As required, use the following shims to adjust a maximum lateral clearance of
1.0 mm (0.04 inch):    
1 133-2717 Shim     Thickness is
0.5 mm (0.02 inch).    
1 093-0097 Shim     Thickness is
2.0 mm (0.08 inch).    
10     1     8T-4780 Bolt     Torque to
570 ± 80 N·m (420 ± 59 lb ft).    

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