3056 Engine for Caterpillar Built Machines Caterpillar

Installation Procedure

1. Ensure that all of the lubrication passages are clean and free of debris.

2. Clean the seat for the main bearing in the cylinder block and clean the upper main bearings.
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   Illustration 1	g00541257

3. Install upper main bearings (8). Ensure that the upper main bearing location tabs are in the correct position in the cylinder block. Lubricate upper main bearings (8) with clean engine oil.
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   Illustration 2	g00572311

4. Ensure that the main bearing journals of crankshaft (7) are clean. Attach lifting straps and a suitable lifting device in order to position the crankshaft in the cylinder block.

5. Clean upper thrust washers and lubricate upper thrust washers (9). Place upper thrust washers (9) in the cylinder block on both sides of the center main bearing. Refer to Illustration 1.
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   NOTICE
   Ensure that the slotted sides of the thrust washers are toward the crankshaft.

6. Clean the lower main bearings. Install the lower main bearings in the main bearing caps with the location tabs in the correct position. Lubricate the lower main bearing caps with clean engine oil.

7. Clean the lower thrust washers and lubricate the lower thrust washers. Place the lower thrust washers in the cylinder block.
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   Illustration 3	g00572309

8. Ensure that the dowels for main bearing caps (4) are in the correct position in the main bearing caps or in the cylinder block. Install main bearing caps (4) in the position that is marked during the removal process. All of the location tabs on the main bearings should be on the same side. The serial number that is stamped on the main bearing cap should match the number that is stamped on the bottom face of the cylinder block.

   Note: The connecting rod caps are held on the connecting rod with two bolts that are threaded into the connecting rod.

9. Install main bearing cap bolts (3). Tighten the bolts to a torque of 265 ± 40 N·m (196 ± 30 lb ft).
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   Illustration 4	g00541254

10. Install connecting rod caps (6) and connecting rod cap bolts (5). Tighten the bolts to a torque of 155 N·m (115 lb ft).
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    Illustration 5	g00541499

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    Illustration 6	g00541498

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    Illustration 7	g00541252

11. Clean the bridge and the face of the cylinder block. Apply a thin bead of Loctite 596 on the corners of the seat for the bridge. Also apply the sealant around the thread holes in the seat for the bridge. Use the following steps when you apply the Loctie 596 to the cylinder block and the bridge.

    1. Apply a 3.0 mm (0.12 inch) bead of Loctie 596 along the corner of the top recess in the cylinder block.

    2. Install bridge (2) and the rubber seals, if equipped. The rubber seals will sit higher than the bridge when the seals are correctly installed. Use a straight edge to line up the bridge with the face of the cylinder block. Tighten socket head bolts (1) to a torque of 16 N·m (12 lb ft). Tighten the bolts evenly.

    3. When the bridge is positioned and the socket head bolts have been tightened, inject Loctite 596 in the groove that are at each end of the bridge. The groove must be completely filled.

    4. When the gasket for the oil pan is removed, damage may occur to the existing seal in the grooves of the bridge. If the seal is damaged, apply a sufficient amount of Loctite 596 in order to fill the grooves.

       Note: Most of the current engines have setscrews that fasten the oil pan to the bridge. The threads of the setscrews have a sealant that is applied by the manufacturer. When the setscrews are installed, ensure that the threads of the socket head bolts and the bridge are clean. Also apply 9S-3263 Thread Lock Compound to the threads of the setscrews. Follow the same process when studs are used instead of the setscrews.

12. Ensure that all of the lubrication passages are clean and free of debris.

End By:

1. Install the housing for the crankshaft rear seal. Refer to Disassembly and Assembly, "Crankshaft - Install".

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

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

4. Install the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump - Install".

5. Install the fuel injection pump. Refer to Disassembly and Assembly, "Fuel Injection Pump - Install".