G3516B and G3520B Generator Set Engines Caterpillar

Installation Procedure

1. Place clean engine oil on the main bearings.

2. Check the clearance of the bearings. Refer to Disassembly and Assembly, "Bearing Clearance - Check" for the correct procedure.
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   Illustration 1	g00577798

3. Install Tool (B) in the oil hole of the crankshaft journal. Place the upper half of the main bearing on the crankshaft. Use Tool (A) to turn the engine and push the upper half of the main bearing into position with Tool (B).
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   Illustration 2	g00577894

4. Place clean engine oil on thrust plates (1) and install thrust plates (1) on each side of center main bearing (2).
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   Illustration 3	g00577895

5. Ensure that main bearing caps (3) are clean and install the lower half of main bearing (4) in main bearing caps (3).
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   Illustration 4	g00577550
   Tightening sequence

   Note: The main bearing caps must be installed with the word "FRONT" and the part number toward the front of the engine. Each main bearing cap has a number on the bottom surface and each main bearing must be installed in the corresponding position in the cylinder block.

6. Lubricate the bolts with clean engine oil prior to assembly.

7. Place the main bearing caps into position and install the bolts. Tighten the bolts in the numerical sequence that is shown above to a torque of 190 ± 14 N·m (140 ± 10 lb ft).

8. Turn the bolts for an additional 180 ± 5 degrees.

9. Check the end play of the crankshaft with Tool (C). The end play must not exceed 0.40 ± 0.23 mm (0.0157 ± 0.0091 inch).
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   Illustration 5	g00577897

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   NOTICE
   Each counterweight is numbered and must be installed in the same position as the corresponding number on the crankshaft mounting pad in order to prevent damage to the crankshaft.

10. Install counterweights (9).

11. The following procedure is for the installation of the counterweights in G3516 Engines.

    1. Ensure that the dowels are in the correct position and install the counterweights on the crankshaft.

    2. Apply 6V-4876 Lubricant to the threads of the bolt, to the shank of the bolt, and to the seat of the bolt prior to assembly.

    3. Tighten the bolts in all of the counterweights to a torque of 70 ± 5 N·m (50 ± 4 lb ft).

    4. Tighten the bolts in all of the counterweights for an additional 120 ± 5 degrees (1/3 turn).

Note: Refer to the Specifications Module for more information on the crankshaft.

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1. Install the piston cooling jets.