C3.3B Tier 4 Interim and EU Stage 3A Engines for Caterpillar Built Machines – Main Bearings – Inspect

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Inspect the main bearings for peeling, melting, seizure or poor contact. If the main bearings are worn or if the main bearings are damaged, replace the main bearings.

  1. Measure the clearance between the main bearings and the crankshaft journal.

  1. Measure the main bearings at positions (1) and (2) in directions (A) and (B). Refer to the Specifications Module, "Cylinder block" topic for information on the tolerances.

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