3126B and 3126E On-highway Engines Caterpillar

Installation Procedure

Note: Place clean engine oil on the crankshaft main bearings prior to assembly. Ensure that the tabs on the back side of the crankshaft main bearings fit in the grooves of the crankshaft main bearing caps and the cylinder block.

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Illustration 1	g00988318

1. Use Tooling (A) and install the upper halves of the crankshaft main bearings in the cylinder block. Do not put oil on the back of the crankshaft main bearing.
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   Illustration 2	g00988316

2. Install the lower halves of the crankshaft main bearings in crankshaft main bearing caps (2). Do not put oil on the back of the crankshaft main bearing.
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   NOTICE
   Crankshaft main bearing caps should be installed with the part number toward the right side of the engine. Crankshaft main bearing caps are to be identified by stamped numbers 1 through 7 located on the bottom surface. The thrust plate is used on the number 6 crankshaft main bearing only.

3. Position crankshaft main bearing caps (2) on the cylinder block. Apply Tooling (B) on the bolt threads and on the washer face. Install bolts (1).

4. Tighten bolts (1) to a torque of 54 ± 7 N·m (40 ± 5 lb ft). Tighten each bolt (1) for an additional 90 ± 5 degrees (1/4 turn).

5. Check the end play of the crankshaft with Tooling (C). The end play must be 0.07 to 0.32 mm (0.003 to 0.013 inch).

End By:

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