YOKE A 0A1650 - Caterpillar

Open the jaw of the shear. The following procedures describe maintaining the jaw in the open position.
In order to hold the shear in the open position for the S320 through S390, install shear lock (1) onto cover (3). The shear lock must be installed behind guide block (2) for the cover. Refer to Table 1 for the part numbers of the shear locks.
Illustration 3 g01144127
Illustration 4 g01144121
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Remove bolts (13), and washers (14) from lower jaw (18) .
Remove the guide blade (7), the bushings (11), and the shims (4) (5) from the lower jaw (18) .
Remove the bolts (15) (16) , the washers (14), the cutting edges (6) (10), the guide blade (7), the shims (3) (4) (5) (9), and the bushings (11) from the jaws.
Measure the amount of shims (3) (4) (5) (9) that are under the cutting edges and guide blades (7). Record the amount of shims. Cutting edges (6) (10) at the front of the jaws and guide blades (7) on the shear jaws are equipped with a bushing (11) .
Clean all parts.
Check cutting edges (6) (10) and guide blades (7). If there is an unused edge, you can use the cutting edges (6) (10) and guide blades (7) again. Clean all surfaces of the cutting edges and guide blades. Grind any burrs on the cutting edge and guide blades.
Inspect the pockets for the cutting edge and guide blades for any wear of damage. If necessary, repair the jaw. Refer to the Operation and Maintenance Manual, "Jaw - Repair" for more information.
Inspect lower jaw (11) for wear. If dimension (A) is greater than 5 mm (0.20 inch), lower jaw (11) must be repaired. Refer to the Operation and Maintenance Manual, "Jaw - Repair".
Reinstall bushings (11), cutting edges, and guide blade (7). Do not install shims.
Install bolts and washers. Do not tighten. Coat the bolts with 5P-3931 Anti-Seize Compound .Note: The cutting edge and guide blades must be in front of the base material in order to reduce the wear of the base material.
Install shims in the lower jaw and in the upper jaw. The shims must equal a minimum of 2 mm (0.08 inch). Shims are used in order to adjust the clearance between the cutting edges.
Coat the bolts with 5P-3931 Anti-Seize Compound .
Tighten the bolts. Refer to Table 2 for the correct torque value.
Table 2
Torque values for the bolts for the cutting edges    
Sales Model    Bolt Size    Torque Value    
S305     M12 x 1.75    
105 20 N m (75 15 lb ft)    
S320     M20 x 2.5    
530 70 N m (390