C3.3 Industrial Engine Caterpillar

Installation Procedure

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Illustration 1	g01026621

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Illustration 2	g00934767

Note: Ensure that the lower bearing shells (3), the upper bearing shells (4), and the appropriate main bearing caps (2) are kept in sets and in the correct sequence for installation.

1. Ensure that all of the main bearing caps (2) are clean and dry. Ensure that both of the hollow dowels (1) are not damaged and that the hollow dowels are securely in place within the main bearing cap (2).

2. Gently wipe the lower bearing shells (3) and the upper bearing shells (4) in order to ensure that the bearing shells are clean and dry. Inspect the lower bearing shells (3) and the upper bearing shells (4). If necessary, replace the bearing shells that are worn or damaged.

   Note: Bearing shells must be replaced in pairs. If a pair of bearing shells need to be replaced, consider replacing all of the bearing shells at the same time.

   Note: The upper bearing shell for the No. 1 crankshaft journal has a lubricating oil slot. The remaining upper bearing shells have an oil hole for lubrication. All new upper bearing shells will have the slot for lubrication.

3. Gently wipe the main journals of the crankshaft in order to ensure that the main journals are clean and dry.

4. Lubricate the bearing surface of the upper bearing shell (4) and lubricate the appropriate main journal with clean engine oil.

   Note: Ensure that the upper bearing shell (4) is 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.

5. Slide the upper bearing shell (4) into position between the appropriate crankshaft journal and the cylinder block.

6. Lubricate the bearing face of the appropriate lower bearing shell (3) with clean engine oil.

   Note: Ensure that the lower bearing shell (3) is installed so that the bearing tab fits into the notch in the appropriate main bearing cap.

7. Install the lower bearing shell (3) into the appropriate main bearing cap (2). Install the main bearing cap (2) into the appropriate position and ensure that the hollow dowels (1) are located within the main bearing cap and within the recesses in the cylinder block.

8. Repeat Step 4 through Step 7 for the remaining main bearings.

   Note: Thrust washers (5) and (6) are installed onto one main bearing in order to limit crankshaft end play. These thrust washers are installed onto No. 3 main bearing of the three cylinder engine.

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   Illustration 3	g00947861
   Typical example

9. Gently wipe the upper thrust washers (6) and the lower thrust washers (5) in order to ensure that the thrust washers are clean and dry. Inspect the upper thrust washers (6) and the lower thrust washers (5). If necessary, replace any damaged thrust washers.

10. Lightly lubricate the upper thrust washers (6) with clean engine oil. Install the upper thrust washers (6) onto each side of the appropriate main bearing in the cylinder block. The grooves on the upper thrust washers (6) must be located against the crankshaft. If necessary, move the crankshaft to the front or to the rear in order to install the thrust washers (6).
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    Illustration 4	g00934744
    Typical example

11. Lightly lubricate the lower thrust washers (5) with clean engine oil. Install the lower thrust washers (5) onto each side of the appropriate main bearing cap. The grooves on the lower thrust washers (5) must be located against the crankshaft.
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    Illustration 5	g01026633

12. Lubricate the threads of the setscrews (7) with clean engine oil.

13. Install the setscrews (7). Tighten the setscrews (7) to a torque of 245 N·m (181 lb ft).

14. Rotate the crankshaft in order to ensure that the crankshaft turns freely.
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    Illustration 6	g01026647

15. Check the crankshaft end play. Use a prybar to move the crankshaft toward the front of the engine. Use a suitable feeler gauge to measure the end play (8) between rear thrust washer (5) and the crankshaft. The maximum permissible crankshaft end play is 0.51 mm (0.020 inch).

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1. Install the rear bridge. Refer to this Disassembly and Assembly Manual, "Crankshaft - Install".

2. Install the crankshaft rear seal. Refer to this Disassembly and Assembly Manual, "Crankshaft Rear Seal - Install".

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

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

5. Install the engine oil pan. Refer to this Disassembly and Assembly Manual, "Engine Oil Pan - Remove and Install".