TIRE AR-RIM & 3554178 - Caterpillar

Measuring Piston Projection
If the original piston is used again, the original connecting rod should also be used in the original cylinder that the piston and rod assembly was removed from.
Table 5
Tooling    
Tool     Part Number     Description    
A     1P-2403     Dial Indicator    
B     1P-2402     Gauge Body    If the projection of the piston is not within the allowed range, a different length of connecting rod may be used to achieve the correct projection of the piston. Different lengths of connecting rods are available to help maintain the correct projection of the piston. The length of the connecting rod is determined by offset machining the inner bore of the piston pin bearing. This will move the position of the piston, making the overall length of the connecting rod shorter or longer. The projection of the piston will determine what length of connecting rod should be used.The other option of correcting piston projection is to purchase a new piston pin bushing. The new bushing can have the center of the inside finished diameter offset machined to change the projection of the piston. Refer to Reuse and Salvage Guideline, SEBF9242, "Specifications and Salvage Procedures for Connecting Rods in C6.6 Engines"
Illustration 4 g01334423
Use the following procedure to measure the projection of the piston. Use the top surface