C3.4B Engines for Caterpillar Built Machines Caterpillar

Illustration 1	g02859356
Typical example

(1) The bearing shell for the connecting rod

For the correct procedure to install the bearing shell for the connecting rod, refer to Disassembly and Assembly, "Pistons and Connecting Rods - Assemble".

Illustration 2	g02844317
Typical example (A) Class of weight (B) Part number (C) Date of production (DD/MM) (D) Date of production (Year) (E) Serial number markings on the connecting rod and connecting rod cap

The mating surfaces of the connecting rod are produced by hydraulically fracturing the forged connecting rod. Ensure that the correct cap for the connecting rod is installed with the correct connecting rod. Ensure that the serial numbers (E) for both components match. Refer to illustration 2 for more information.

(2) Torque of the setscrews for the connecting rod ... 50 N·m (37 lb ft)

Tighten the setscrews (2) for the connecting rod for an additional 70 degrees. The setscrews for the connecting rod must be replaced after this procedure.

Illustration 3	g02859357
Typical example

(3) Diameter of the finished bore for the piston pin ... 36.01 to 36.02 mm (1.41771 to 1.41811 inch)

(4) Distance between the parent bores ... 161.98 to 162.02 mm (6.37715 to 6.37873 inch)

(5) Diameter for the finished bore for the connecting rod bearing ... 71.833 to 71.848 mm (2.82807 to 2.82866 inch)

Refer to table 2 for the length of connecting rod.