3508B, 3512B and 3516B Generator Set Engines Crankshaft - Remove Caterpillar

Removal Procedure

Start By:

1. Remove the rocker shaft assemblies and the pushrods. Refer to Disassembly and Assembly, "Rocker Shaft and Push Rods - Remove".

2. Remove the flywheel housing. Refer to Disassembly and Assembly, "Flywheel Housing - Remove and Install".

3. Remove the front housing. Refer to Disassembly and Assembly, "Front Drive Housing - Remove and Install".

4. Remove the piston cooling jets. Refer to Disassembly and Assembly, "Piston Cooling Jets - Remove and Install".

1. Use Tooling (A) to turn the engine to a horizontal position. The engine can be supported with Tooling (A) or with blocks.

   • The weight of the 3508B Engine is approximately 3470 kg (7650 lb).

   • The weight of the 3512B Engine is approximately 5440 kg (12000 lb).

   • The weight of the 3516B Engine is approximately 6550 kg (14440 lb).

   Note: It is not necessary to remove the counterweights from the crankshaft, if the piston and connecting rod assemblies have been removed from the engine.

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   Illustration 1	g01124519

2. Place identification marks on counterweights (2). Remove bolts (1) and counterweights (2) from the crankshaft.

   Note: Do not reuse bolts (1). Use new bolts in order to secure the counterweight to the crankshaft.

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   Illustration 2	g01124522

   Note: Number the connecting rod bearing caps and the connecting rods for installation purposes.

3. Remove bolts (3). Remove connecting rod bearing cap (4) and push the connecting rod away from the crankshaft.

   Note: Ensure that the journals of the crankshaft are not scratched by the connecting rods.

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   Illustration 3	g01124538

4. Attach Tooling (B) to each end of crankshaft (7). Attach a suitable lifting device to Tooling (B). The weight of the 3508B crankshaft is approximately 398 kg (877 lb). The weight of the 3512B crankshaft is approximately 590 kg (1300 lb). The weight of the 3516B crankshaft is approximately 800 kg (1764 lb).

5. Remove bolts (5) and main bearing caps (6).

6. Remove thrust plates (8) from each side of the center main bearing.

7. Remove crankshaft (7) from the cylinder block.

8. Remove the upper halves of the main bearings from the cylinder block.

9. Remove the upper halves of the connecting rod bearings from the connecting rods.
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   Illustration 4	g01124543

10. If necessary, remove bolts (9) and crankshaft gear (10) from each end of the crankshaft.