| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 4C-9832 | Engine Rollover Stand | 1 |
Start By:
- Remove the rocker shaft assemblies and the pushrods.
- Remove the front drive housing.
- Remove the rear gear group.
- Remove the piston cooling jets.
| NOTICE |
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The rocker shaft assemblies and the push rods must be removed to ensure that the inlet and exhaust valves are not open. If the valves are open the face of the inlet and exhaust valves could be damaged when the pistons are pushed into the cylinder, away from the crankshaft. |
| NOTICE |
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Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life. |
| NOTICE |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products. Dispose of all fluids according to local regulations and mandates. |
- Use Tooling (A) to turn the engine in a horizontal position. The engine can also be supported with blocks. The G3508 Engine weighs approximately
5443 kg (12000 lb) . The G3516 Engine weighs approximately9010 kg (19865 lb) . The G3520 Engine weighs approximately10795 kg (23800 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 g00577386 - Place identification marks on counterweights (1). Remove counterweights (1) from the engine.
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Illustration 2 g00577387 Note: Ensure that the journals of the crankshaft are not scratched by the connecting rods.
- Remove connecting rod bearing caps (2) and push the connecting rods away from the crankshaft.
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Illustration 3 g00577388 - Remove the center main bearing cap and two thrust plates (3) from each side of the center main bearing.
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Illustration 4 g00577389 Typical example - Use two of the bolts from the flywheel and install one bolt in each end of crankshaft (4).
- Attach a suitable lifting device to crankshaft (4). Remove remaining main bearing caps (5) and remove crankshaft (4) from the engine. The crankshaft for the G3508 Engines weighs approximately
405 kg (895 lb) . The crankshaft for the G3516 Engines weighs approximately762 kg (1602 lb) . The crankshaft for the G3520 Engines weighs approximately910 kg (2010 lb) . - Remove the upper halves of the main bearings and also remove the upper halves of the connecting rod bearings.
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Illustration 5 g00577390 - If necessary, remove bolts (7) and crankshaft gear (6) from each end of the crankshaft.
