C7.1 Marine Propulsion Engine Caterpillar

Removal Procedure

Reference: Special Instruction, "Visual Service Procedures - Colors and Symbols" M0066576.

Start By:

1. Remove the engine oil pump.

2. Remove the front housing.

3. Remove the crankshaft rear seal.

4. If necessary, remove the cylinder head.

5. If necessary, remove the pistons and connecting rods.

1. The engine should be mounted on a suitable stand and placed in the inverted position.

2. If the cylinder head, the pistons, and the connecting rods have not been removed already, remove the connecting rod bearings. Refer to Disassembly and Assembly, "Connecting Rod Bearings - Remove" for the correct procedure.

3. Ensure that the main bearing caps are marked for the location and orientation.

Illustration 1	g06280630

Illustration 2	g06280632

Illustration 3	g06280633

Illustration 4	g06280635

Note: Keep the lower main bearing shells with the respective main bearing caps.

Note: The lower main bearing shells are plain bearings that have no oil holes.

Illustration 5	g06280642

For number six main bearing, remove two thrust washers from the cylinder block. To remove the thrust washers, rotate the crankshaft in the correct direction. If necessary, push the crankshaft toward the front of the engine while you rotate the crankshaft, to aid removal. If necessary, push the crankshaft toward the rear of the engine while you rotate the crankshaft, to aid removal.

Note: The thrust washers have a locating tab at one end.

Illustration 6	g06280727

Note: Do not damage any of the finished surfaces on the crankshaft. When the crankshaft is removed from the engine, the crankshaft must be supported on a suitable stand to prevent damage to the crankshaft timing ring.

Illustration 7	g06280735

Note: Keep the upper main bearing shells with the respective main bearing caps. The upper main bearing shells have a groove and two oil holes.

If necessary, remove the crankshaft timing ring. Refer to Disassembly and Assembly, "Crankshaft Timing Ring - Remove and Install" for the correct procedure.

If necessary, remove the crankshaft gear. Refer to Disassembly and Assembly, "Crankshaft Gear - Remove and Install" for the correct procedure.