CRANKSHAFT A 8N9699 - Caterpillar

1. Remove the main bearing cap retaining nuts and washers.2. Remove the main bearing cap. Remove the lower half of main bearing from cap.3. Remove the upper half of crankshaft main bearing from the cylinder block.Install Crankshaft Main Bearings
1. Lubricate the crankshaft main bearing journal. Install the upper half of main bearing. 2. Lubricate the washer face and threads of the bearing cap retaining nuts with clean SAE 30 crankcase oil.3. Install the lower half of main bearing in cap. Position the cap and install retaining nuts and washers.4. Tighten all the main bearing nuts initially to 60 5 lb. ft. (8,3 0,7 mkg) in sequence A-B-C-D. 5. Mark the nut and end of each stud and tighten all nuts in sequence A-B-C-D and additional 120° 5° from the mark.6. Check the main bearing clearance. Main bearing clearance should be .0046 - .0076 in. (0,117-0,193 mm). Maximum permissible clearance is .010 in. (0,25 mm).7. Check the crankshaft end play (controlled by thrust bearings on crankshaft rear main bearing cap). End play should be .010 - .022 in. (0,25 - 0,56 mm).concluding step: a) install oil pan and oil pump