C2.2 Engines for Caterpillar Built Machines Caterpillar

Illustration 1	g00693257
Typical example

(1) Connecting rod

(2) Piston pin bearing

Clearance between the piston pin and the piston pin bearing ... 0.010 to 0.027 mm (0.0004 to 0.0011 inch)

Service limit ... 0.08 mm (0.00315 inch)

(3) Tighten the nut and bolt to the following torque. ... 52 N·m (38 lb ft)

(4) Connecting rod bearing

Clearance between the connecting rod bore and the connecting rod bearing ... 0.10 to 0.30 mm (0.004 to 0.012 inch)

Service limit ... 0.70 mm (0.0276 inch)

Markings on the Connecting Rod

Illustration 2	g03811199
Typical example

The pistons and connecting rods are matched to each cylinder. Note the position of each connecting rod and piston for correct assembly.

Identification marks (X) on the connecting rod and on the connecting rod cap must be matched and aligned. When the connecting rod is installed correctly, the marks should face the right side of the engine.

Refer to Systems Operation, Testing and Adjusting, "Connecting Rod - Inspect" for the procedure to measure distortion and parallelism of the connecting rod.