BODY A PISTON 8N1607 - Caterpillar

Remove Crankshaft Main Bearings
preparatory step: a) remove oil pump1. Remove the main bearing cap retaining nuts and washers. 2. Remove the main bearing cap (1). Remove the lower half of main bearing (2) 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 in the letter sequence A-B-C-D to an initial torque of 60 5 lb. ft. (8,3 0,7 mkg). 5. Mark the nuts and end of studs, and tighten all nuts in letter sequence A-B-C-D an additional 120° 5° from marks.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 center main bearing cap). End play should be .010-.022 in. (0,25-0,56 mm).concluding step: a) install oil pump