COVER 4735089 - Caterpillar

Removal Procedure
Start By:
Remove the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump - Remove".
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.
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.
Illustration 1 g00947823
Remove bolts (1) and main bearing cap (2).
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.
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.
Illustration 4 g00934744
Remove the lower half of thrust washer (5) from the center main bearing cap.
Illustration 5 g00947753
Remove the upper half of thrust washer (6) from each side of the center main bearing in 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.