DRIVE AR-REAR 1247422 - Caterpillar

Start By:a. remove oil pump1. Check the connecting rods and caps for their identification and location. 2. Turn the crankshaft until the connecting rod caps are in position.3. Remove two bolts (1) and the cap from the connecting rod. Remove the lower half of the bearing from the cap.4. Push the connecting rod away from the crankshaft. Remove the upper half of the bearing from the connecting rod. Install the bearings dry when the clearance checks are made. Put clean engine oil on the bearings for final assembly.5. Install the upper half of the bearing in the connecting rod.6. Pull the connecting rod slowly on to the crankshaft. 7. Install the lower half of the bearing in the cap. Be sure the tabs in the back of bearings are in the tab grooves of the connecting rod and cap. The serviceman must be very careful to use Plastigage, Tool (A) correctly. The following points must be remembered:... Make sure that the backs of the bearings and the bores are clean and dry.... Make sure that the bearing locking tabs are properly seated in their slots.... The crankshaft must be free of oil where the Plastigage touches it.... Put of a piece of Plastigage (A) on the crown of the bearing half that is in the cap. Do not allow the Plastigage to extend over the edge of the bearing.... Install the bearing cap using the correct torque-turn specifications. Do not use an impact wrench. Be careful not to dislodge the bearing when the cap is installed.... Do