STEM AS 9X7669 - Caterpillar

Illustration 1 g01418268Note: Handle the fractured connecting rod with care. Use a soft jawed vise in order to hold the connecting rod when you are loosening the connecting rod cap bolts. Use a soft faced hammer in order to tap the connecting rod cap, if necessary. (A) Bore in the bearing for the piston pin ... 46.035 0.008 mm (1.8124 0.0003 inch) (B) Bore in the connecting rod for the piston pin bearing ... 50.640 0.013 mm (1.9937 0.0005 inch) (C) The bearing joint must be within 5 degrees of either location. Note: The connecting rod must be heated for the installation of the piston pin bearing. Do not use a torch. (D) The connecting rod may be heated from 175 to 260 °C (347 to 500 °F) for the installation of the piston pin bearing. Maximum distance for heating the connecting rod ... 83.0 mm (3.27 inch)Note: Thoroughly lubricate the piston pin with clean engine oil prior to assembly of the piston and connecting rod. (E) Distance between the center of the bearings ... 217.00 mm (8.543 inch) (G) Bore in the connecting rod for the crankshaft bearing ... 85.000 0.013 mm (3.3465 0.0005 inch)
Illustration 2 g01416591
View F-F
(1) Etch the cylinder number on the connecting rod and the cap in this location. Mark the connecting rod and the cap with a number 1 through 6. Mark the numbers on the same side of the connecting rod as the bearing retainer notch (3). Note: Install the rod and piston group in the engine with the part number of the forging for the rod assembly to the rear of the engine. The rear of the engine is the flywheel end of the engine. Lubricate the rod and piston group with clean engine oil before you insert the rod and piston group into the block. (2) Use the following procedure to tighten the connecting rod bolts:
Torque the bolts to 50 5 N m (37 4 lb ft).
Rotate each bolt in a clockwise direction for 90 5 degrees (1/4 of a turn).