ENGINE AR-COMPL 20R2525 - Caterpillar

Illustration 1. Example of twist and bend of a connecting rod.Illustration 2 shows another type of bending damage associated with failures experiencing a hydraulic lock.
Illustration 2. Possible bending damage from hydraulic lock.A close visual inspection should be made to determine any bending damage as shown in Illustration 2. Even if the connecting rod is only slightly bent, the pin bore to crankshaft bore distance may still be within specifications. For this reason the visual check is of increased importance and any questionable connecting rod should be replaced.
Inspection procedures given in the reference guideline should be closely followed to prevent failures from salvaged connecting rods.