3508C, 3512C and 3516C Marine Engines Crankshaft Main Bearings - Remove Caterpillar

Removal Procedure

Start By:

1. Remove the oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump - Remove".

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Illustration 1	g01125228

1. Remove side cover (1) from the cylinder block.

2. Use Tooling (A) to rotate the counterweight on the crankshaft to the top of the cylinder block.
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   Illustration 2	g01125196

3. Use Tooling (B) and loosen bolts (3) for the main bearing cap. Remove the outer bolts from main bearing cap (2).
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   Illustration 3	g01125192

4. Install Tooling (D) until Tooling (D) bottoms out in the block. Adjust the nuts on Tooling (D) until the nuts make contact with main bearing cap (2). Remove bolts (3) from the main bearing cap.
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   Illustration 4	g01125205

5. Loosen the nuts on Tooling (D) evenly in order to lower main bearing cap (2). Lower main bearing cap (2) to the end of the bolt on Tooling (D) in order to gain access to the main bearings.
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   Illustration 5	g01125209

6. Use Tooling (A) and rotate the crankshaft until the oil hole of the crankshaft journal is just below the side of the main bearing without the tab. Install Tooling (C) and remove the upper bearing.

7. The following step is for removing the thrust plates from the cylinder block. Remove the thrust plates on each side of the center main bearing. It may be necessary to move the crankshaft with a prybar in order to remove the thrust bearing from the cylinder block.
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   Illustration 6	g01125211

8. Remove lower main bearing (4) from main bearing cap (2).