BEARING-ROLLER 1548256 - Caterpillar

Probable Causes
Incorrect ignition timing
Incorrect maintenance of the spark plugs
High compression ratio
Excessive loadRecommended Repairs
Ignition Timing
Note: Data from a fuel analysis is required for this procedure.Use an electronic service tool to check for the correct desired ignition timing. Compare the timing to the recommended timing in the Engine Performance, "Fuel Usage Guide".Adjust the ignition timing according to the recommended timing in the Engine Performance, "Fuel Usage Guide".Spark Plug
Maintain the spark plug according to the engine's Operation and Maintenance Manual.Cylinder Compression
Deposits in the cylinder can increase the compression ratio.Measure the cylinder compression. Refer to the engine's Operation and Maintenance Manual, "Cylinder Pressure - Measure/Record".Excessive Load
Higher loads reduce the service life of spark plugs. Determine whether the engine has been operating beyond the recommended rated load.