3056E Industrial Engine Caterpillar

Crankshaft Main Bearings - Remove

Usage:

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	9U-6282	Torque Wrench Extension	1

Start By:

Remove the engine oil relief valve. Refer to Disassembly and Assembly, "Engine Oil Relief Valve - Remove and Install".
Remove the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump - Remove".

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NOTICE

Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

Note: Remove the following components from the engine in order to remove the rear main bearing with the crankshaft in position: flywheel, flywheel housing, rear oil seal housing and bridge assembly.

Note: Use Tooling (A) in order to remove the front main bearing cap with the front housing and the engine oil pump in place. If Tooling (A) is not available, removal of the front cover and the engine oil pump will be necessary. The engine oil pump is attached to the front main bearing cap. Removal of the bolts is not possible with a socket. Refer to Disassembly and Assembly, "Engine Oil Pump - Remove".

Make sure that the main bearing caps are marked for the location and direction for installation. The main bearings and the main bearing caps must be installed in the same location.
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Illustration 1 g00947823
Remove bolts (1) and main bearing cap (2).
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Illustration 2 g00934803
Remove lower main bearing (3) from main bearing cap (2). Keep the respective main bearing and the main bearing cap together for proper installation.
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Illustration 3 g00934767
Push upper main bearing (4) from the opposite side of the bearing tab with a suitable tool. Carefully rotate the crankshaft while you push on the bearing. Remove upper main bearing (4) from the cylinder block. Keep the upper bearing halves together in order to ensure proper installation.
Repeat Step 2 through Step 4 for the remaining main bearings.
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Illustration 4 g00934744
Remove the lower half of thrust washer (5) from the main bearing cap.
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Illustration 5 g00947753
Remove the upper half of thrust washer (6) from the cylinder block with a suitable tool. Carefully rotate the crankshaft while you push on the thrust washer (6). If necessary, move the crankshaft to the front or to the rear in order to loosen a tight thrust washer.