ENGINE ARRANGEMENT 4N9962 - Caterpillar

Introduction
This procedure determines the following characteristics of the connecting rod:
The distortion of the connecting rod
The parallel alignment of the bores of the connecting rodInspection Procedure
Use the appropriate tools in order to measure the distances for the connecting rod (2) which are specified in Illustration 1.
Appropriate gauges for measuring distance
Measuring pins (1)
Illustration 1 g00927038
Measure the connecting rod for parallel alignment.
(1) Measuring pins
(2) Connecting rod
(L) Distance between the center of the bore for the piston pin bearing and the center of the connecting rod bearing bore is shown in Illustration 1.
(K) Take measurements at the distance 127 mm (5.0 inch) from connecting rod. Note: The piston pin bearing should be removed before taking the measurements.
Measure the connecting rod for distortion and parallel alignment between the bores. The measurements must be taken at distance (K). Distance (K) has a value of 127 mm (5.0 inch) from both sides of the connecting rod.Measure length (L).The total difference in measurements of length (L) from each side should not vary more than 0.25 mm ( 0.010 inch). If the piston pin bearing is not removed, the limits are reduced to 0.06 mm ( 0.0025 inch).
Inspect the piston pin bearing and the piston pin for wear and other damage.
Measure the clearance of the piston pin in the piston pin bearing. Refer to Specifications, "Connecting Rod" for clearance dimensions.