MOUNTING GP-DIFFERENTIAL 3042745 - Caterpillar

Replace the Cutters
Install blocking in order to hold the jaws in the open position.
Illustration 1 g00783917
Illustration 2 g00756969
Remove the bolts (1), the washers (2), and the nuts (3) from the guide blade (4) .
Clean the threads of the bolts.
Remove the guide blade (4) and the shims (5) .Clean the surfaces of the guide blade and the shims.
Remove the cutting edges from the upper jaw and the lower jaw.
Measure the amount of shims (5) that are under the cutting edges and the guide blade (4). Record the amount of shims. Measure the amount of shims (7) that are behind the lock bushing (6). Record the amount of shims. The cutting edges (8) and (9) at the front of the jaws and the guide blade (4) on the shear jaws are equipped with a lock bushing (6). When the thickness of the shims (5) under the guide blade (4) is more than 2 mm (0.08 inch), you should mount shims (7) behind the lock bushing (6). The amount of shims (7) is determined by subtracting 2 mm (0.08 inch) of thickness from amount of shims under the guide blade (4). This will allow the lock bushing (6) to function properly.
Check the guide blade (4). If there is an unused edge, you can use the guide blade again. Clean all surfaces of the guide blade. Grind any burrs on the guide blade.
Inspect the pocket for the guide blade for any wear or damage. If necessary, repair the jaw. Refer to the Operation and Maintenance Manual, "Jaw - Repair" for more information.
Inspect the pockets for the cutting edges for any wear or damage. If necessary, repair the jaw. Refer to the Operation and Maintenance Manual, "Jaw - Repair" for more information.
Illustration 3 g00757515
Inspect the lower jaw (11) for wear. If dimension (A) is greater than 5 mm (0.20 inch), the lower jaw (11) must be repaired. Refer to the Operation and Maintenance Manual, "Jaw - Repair".
Reinstall the guide blade (4). Do not install the shims (5) .
Coat the bolts with 5P-3931 Anti-Seize Compound .
Install the cutting edges in the lower jaw. Do not install the shims.
Coat the bolts with 5P-3931 Anti-Seize Compound .
Install the cutting edges in the upper jaw. Install the shims that were removed.
Coat the bolts with 5P-3931 Anti-Seize Compound .
Install the bolts (1), the washers (2), and the nuts (3). Tighten the bolts and the nuts. Refer to Table 1 for the correct torque value.
Table 1
Torque values for the bolts for the cutting edges    
Sales Model    Bolt Size    Torque Value    
VPS-35/2     M20 x 2.5    
530 70 N m (390 50 lb ft)    
VPS-45/2     M20 x 2.5    
530 70 N m (390 50 lb ft)    
Remove the blocking from the jaw.
Start the host machine.
Illustration 4 g00757517
Slowly close the