GEAR (59 TEETH) 5M6446 - Caterpillar

Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Note: Install the crankshaft main bearings and the connecting rod bearings dry when clearance checks are performed. Refer to Disassembly and Assembly, "Bearing Clearance - Check". Apply clean engine oil on the crankshaft main bearings and the connecting rod bearings for final assembly.Note: Do not place the fractured faces of the connecting rod cap on any surface. The connecting rod cap must be laid flat on the side in order to prevent damage to the fractured faces of the connecting rod cap.
Install the upper halves of the main bearings in the cylinder block. Do not apply oil to the back of the crankshaft main bearing. Ensure that all of the lubrication passages are clean and free of debris.Note: Ensure that the crankshaft main bearings are installed so that the bearing tabs fit into the notch in the cylinder block. The upper halves of the crankshaft main bearings have the oil groove and the oil hole.
Illustration 1 g01144484
Attach Tooling (A) and a suitable lifting device to crankshaft (5). The weight of crankshaft (5) is approximately 68 kg (150 lb). Install the crankshaft with the timing mark on the crankshaft gear in alignment with the "V" mark on the idler gear.
Illustration 2 g01026881
Install thrust plates (6) on each side of the No. 6 main bearing.Note: Install the thrust plates with the words "Block Side" toward the cylinder block.
Install the lower half of the crankshaft main bearing in the crankshaft main bearing cap. Do not apply oil to the back of the crankshaft main bearing.Note: Ensure that the crankshaft main bearing is installed so that the bearing tab fits into the notch in the main bearing cap.
Illustration 3 g01026926
Install crankshaft main bearing cap (2) and bolts (1) .
Check the bearing clearance. Refer to Disassembly and Assembly, "Bearing Clearance - Check".
Remove bolts (1) and remove crankshaft main bearing cap (2). Apply a thin coating of clean engine oil on the surface of the lower half of the crankshaft main bearing.
Place crankshaft main bearing caps (2) in position on the cylinder block. Apply clean engine oil or Molylube on the bolt threads and the washer face of bolts (1). Install bolts (1) .Note: Ensure that the numbers on the crankshaft main bearing caps match the numbers on the cylinder block. Also ensure that the part number of the crankshaft main bearing cap is installed on the right side and toward the front of the cylinder block.
Tighten bolts (1) for the crankshaft main bearing caps, as follows:
Tighten Bolt (A) of the crankshaft main bearing cap to a torque of 95 5 N m (70 4 lb ft).
Tighten Bolt (B) of the crankshaft main bearing cap to a torque of 95 5 N m (70 4 lb ft).
Tighten Bolt (A) and Bolt (B) for an additional 90 5 degrees (1/4 turn).Note: If Tooling (C) is not used, place an index mark on the bolt and the crankshaft main bearing cap.
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