SHAFT-RH 8Y1081 - Caterpillar

Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 448-5087 Barring Tool(1) 1
B 9U-5023 Main Bearing Wrench 1
C 2P-5517 Main Bearing Tool 1
D 230-5843(2)
or
236-6688(3) Main Bearing Cap Tool 2
E 9S-7351 Torque Wrench 1
(1) The 285-5989 Engine Turning Tooling is alternate tooling.
(2) Use with 19.0 mm (3/4 inch) main bearing cap bolts.
(3) Use with 22.2 mm (7/8 inch) main bearing cap bolts.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Measure the clearances of the main bearings. Refer to Disassembly and Assembly, "Bearing Clearance - Check".
Ensure that the upper halves and the lower halves of the main bearings are installed with the tabs fitting into the notch in the cylinder block and the notch in the main bearing cap.
Illustration 1 g00930606
Coat the main bearings with clean engine oil. Install new lower main bearing (4) into main bearing cap (2).
Install the new upper main bearing with the side without the tab into the side of the block with the tab. Use your hand and roll the upper main bearing into position. Use Tooling (A) and rotate the crankshaft. Rotate the crankshaft until the oil hole is positioned in front of the side of the upper main bearing with the tab.
Install Tooling (C) and finish rolling the upper main bearing into position. Make sure that Tooling (C) does not slide under the upper main bearing.
Remove Tooling (C).
Illustration 2 g00930593
Illustration 3 g00930745
Tighten nuts (3) on Tooling (D) to raise main bearing cap (2) to the block. Nuts (3) must be tightened evenly in order for main bearing cap (2) to fit into the block.
Coat the threads of the bolts for the main bearing caps and coat the underside of the bolt heads with clean engine oil. Install the two inner bolts for the main bearing cap. Remove Tooling (D) and install the two outer bolts for the main bearing cap.
Illustration 4 g00930580
Illustration 5 g01001689Note: Install main bearing caps with the part number and FRONT toward the front of the block. Each cap has a number. Each cap must be installed in the same position as the correct number on the side of the cylinder block pan rail.
Tighten the bolts in the letter sequence to the following torque. Use Tooling (E) and Tooling (B) to tighten the bolts to a torque of 190 14 N m (140 10 lb ft).
Tighten the bolts in the letter sequence to the following torque. Tighten the bolts an additional 180 5 degrees (1/2 turn).
Illustration 6 g00930577
Install covers (1) onto the side of the engine.End By:
Install the oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump - Install".