GEAR AS 8R7808 - Caterpillar

Illustration 1 g01333870
Cylinder block
(1) Cylinder block (2) Cylinder bore ... 105.000 to 105.025 mm (4.1338 to 4.1348 inch)The maximum permissible wear for the cylinder bore ... 0.15 mm (0.0059 inch) (3) Camshaft bearings Diameter of the bushing in the cylinder block for the number 1 camshaft bearing ... 55.563 to 55.593 mm (2.1875 to 2.1887 inch)Diameter of the bore in the cylinder block for the number 2 camshaft journal ... 50.546 to 50.597 mm (1.9900 to 1.9920 inch)Diameter of the bore in the cylinder block for the number 3 camshaft journal ... 50.292 to 50.343 mm (1.9800 to 1.9820 inch)Diameter of the bore in the cylinder block for the number 4 camshaft journal ... 50.038 to 50.089 mm (1.9700 to 1.9720 inch) (4) Main bearings Bore in the cylinder block for the main bearings ... 88.246 to 88.272 mm (3.4742 to 3.4753 inch) (5) Main bearing cap bolts Use the following procedure in order to install the main bearing cap bolts:
Apply clean engine oil to the threads of the main bearing cap bolts.
Put the main bearing caps in the correct position that is indicated by a number on the top of the main bearing cap. Install the main bearing caps with the locating tabs in correct alignment with the recess in the cylinder block.
Evenly tighten the main bearing cap bolts. Torque for the main bearing cap bolts. ... 80 N m (59 lb ft)
Tighten the bolts for the main bearing cap for an additional 90 degrees. Note: Ensure that the crankshaft can rotate freely.