TUBE AS 1211767 - Caterpillar

start by: a) remove oil pump1. Check the connecting rods and caps for their identification and location.2. Turn crankshaft until connecting rod caps are in position shown. 3. Remove the nuts (1) and the cap from connecting rod. Remove lower half of bearing from cap. 4. Push the connecting rod away from the crankshaft. Remove the upper half of bearing from connecting rod. Install the bearings dry when the clearance checks are made. Put clean engine oil on the bearings for final assembly.5. Install upper half of bearing in connecting rod.6. Pull the connecting rod slowly on to the crankshaft.7. Install lower half of bearing in cap. Be sure the tabs in back of bearings are in the tab grooves of connecting rod and cap.
Do not use an impact wrench to tighten the bolts the additional 120° 5°.
8. Use Plastigage (A) to check bearing clearance.9. Put Plastigage (A) on the bearing.10. Put clean engine oil on threads of rod bolts and seat surfaces of nuts. Be sure the cylinder numbers on the rod cap and rod are the same and are on the same side of the connecting rod. Numbers are on the same side of rod and cap as are the grooves for the bearing tabs. If new rods are installed, put the cylinder number on the rod and cap. Do not turn the crankshaft when Plastigage (A) is in position. 11. Install the rod caps (2). Install the nuts. Tighten each nut to a torque of 60 6 lb. ft. (80 8 N m). Put a mark on the nuts and cap and tighten nuts an extra 120° 5° from the mark. Remove the rod cap. Remove Plastigage (A) and check the bearing clearance. The bearing clearance must be .0028 to .0066 in. (0.071 to 0.168 mm) for new bearings. Maximum clearance with used bearings is .010 in. (0.25 mm).12. Put clean engine oil on lower half of bearing. Install rod cap again. Tighten each nut to 60 6 lb.ft. (80 8 N m). Put a mark on nuts and cap and tighten nuts an extra 120° 5° from mark.13. Do Steps 1 through 12 for remainder of connecting rod bearings.end by:a) install oil pump