3056E Industrial Engine Caterpillar

Installation Procedure

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Illustration 1	g00934767

1. Clean upper main bearing (4) and lubricate the bearing surface with clean engine oil.

   Note: Ensure that the upper halves of the main bearings are installed so that the bearing tabs fit into the notch in the cylinder block.

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   NOTICE
   Only the upper half of the main bearing has lubrication holes. Make sure the upper half of the main bearing is installed correctly in the cylinder block to ensure proper lubrication.

2. Slide upper main bearing (4) into position between the crankshaft journal and the cylinder block.
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   Illustration 2	g00934803

3. Clean main bearing cap (2) and lower main bearing (3). Lubricate the bearing surface of lower main bearing (3) with clean engine oil.

   Note: Ensure that the lower halves of the main bearings are installed so that the bearing tabs fit into the notch in the main bearing caps.

4. Install lower main bearing (3) in main bearing cap (2).
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   Illustration 3	g00947861

5. Install the lower half of thrust washer (6) on each side of the center main bearing cap. The grooves on the thrust washer must be located against the crankshaft.
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   Illustration 4	g00934744

6. Install the upper half of thrust washer (5) on each side of the center main bearing. The grooves on the thrust washer must be located against the crankshaft.
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   Illustration 5	g00947823

7. Install main bearing caps (2). Lubricate the threads of bolts (1) with clean engine oil.

   Note: Make sure that the bearing tabs on both halves of the main bearings are located on the same side.

8. Install bolts (1). Tighten bolts (1) to a torque of 265 N·m (195 lb ft). Use Tooling (A) to tighten the bolts for the front main bearing cap.

9. Repeat Steps 1 through 8 for the remaining main bearings.

10. Rotate the crankshaft in order to ensure that the crankshaft turns freely.
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    Illustration 6	g00947908

11. Check the crankshaft end play. Use a prybar to move the crankshaft toward the front of the engine. Use Tooling (B) to measure the end play between rear thrust washer (5) and the crankshaft. The maximum permissible crankshaft end play is 0.51 mm (0.020 inch).

    Note: If the crankshaft was not removed for the rear main bearing removal, the following components must be installed: bridge assembly, rear oil seal housing, flywheel housing and flywheel.

End By:

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

2. Install the engine oil relief valve. Refer to Disassembly and Assembly, "Engine Oil Relief Valve - Remove and Install".