EDGE AS-CUTTING 1486914 - Caterpillar

Illustration 1 g00888747
Note: Handle the fractured connecting rod with care. Use a soft jawed vise in order to hold the connecting rod while loosening the connecting rod cap bolts. Use a soft faced hammer in order to tap the connecting rod cap, if necessary.The connecting rod small end must be heated from 175 to 260 °C (347 to 500 °F) before the installation of the piston pin bearing.Apply heat only within length (A) of the connecting rod. ... 75 5 mm (3.0 0.2 inch)The bearing joint for the piston pin bearing (B) must be positioned at 12 5 degrees (C) above the centerline on either side. (1) Bore size for the piston pin bearing Bore in the connecting rod for the piston pin bearing ... 43.191 0.013 mm (1.7004 0.0005 inch) (2) Bore size for the piston pin after the installation of the bearing Bore in the piston pin bearing ... 40.028 0.008 mm (1.5759 0.0003 inch) (3) Distance between the center of the connecting rod bores ... 200 mm (7.9 inch) (4) Crankshaft bore in the connecting rod for connecting rod journal ... 75.000 0.013 mm (2.9527 0.0005 inch)Note: Use the following procedure to tighten the connecting rod bolts before measuring the crankshaft bore. Check the dimensions of the crankshaft bore only after the tightening procedure has been followed. (5) Connecting rod boltsUse the instructions that follow in order to tighten the connecting rod cap bolts:
Before installing the rod cap, clean the mating surfaces of the connecting rod with compressed air or a steel brush. Ensure that there are no loose particles that remain from the process that is used to fracture the rod.Note: Lubricate the seating faces of the rod cap bolts with 4C-5593 Anti-Seize Compound or engine oil before installing the bolts.
Install new connecting rod cap bolts (5) .Tighten each of the cap bolts to the following torque. ... 70 5 N m (50 4 lb ft)
Place an index mark on each connecting rod cap bolt and tighten each of the cap bolts for an additional 120 5 degrees (1/3 of a turn).