INSULATION 3913150 - Caterpillar

Illustration 1 g00320945
Checking turbocharger rotating assembly end play (typical example)End play is checked with a dial indicator. Attach a dial indicator with the indicator point on the end of the shaft. Apply forward and backward force to the shaft of the turbocharger. Make a note of the total indicator reading.If the end play is more than the maximum end play, rebuild the turbocharger or replace the turbocharger. A measurement that is below the minimum specification could indicate that there is carbon on the turbine wheel. The turbocharger should be disassembled for cleaning and inspection.A more reliable check of the bearing conditions can be made only when the turbocharger is disassembled. The bearings, the shaft journal, and the housing bore diameters can actually be measured.Note: Do not cock the shaft. This could result in a false reading.