3024C Engine for Caterpillar Built Machines Caterpillar

Illustration 1	g00693257

(1) Connecting rod

(2) Piston pin bearing

Clearance between the connecting rod and the piston pin bearing ... 0.010 to 0.025 mm (0.0004 to 0.0010 inch)

Service limit ... 0.10 mm (0.004 inch)

(3) Bolt and nut for connecting rod cap

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

(4) Connecting rod bearing

Clearance between the connecting rod and the connecting rod bearing ... 0.035 to 0.085 mm (0.0014 to 0.0033 inch)

Service limit ... 0.20 mm (0.008 inch)

Markings on the Connecting Rod

Illustration 2	g00555416
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 (1) on the connecting rod and on the connecting rod cap must align. When the connecting rod is installed correctly, the marks should face the right side of the engine.

Distortion of the Connecting Rod

Distortion of the connecting rod

For every 100 mm (3.94 inch) of length, the distortion should be less than the following value. ... 0.08 mm (0.003 inch)

Service limit for 100 mm (3.94 inch) of length of distortion ... 0.20 mm (0.008 inch)

Parallelism

For every 100 mm (3.94 inch) of length, the connecting rod should be in parallel less than the following value. ... 0.05 mm (0.002 inch)

Service limit for 100 mm (3.94 inch) of length of parallelism ... 0.15 mm (0.006 inch)