Mitsubishi 6M70 - Shaft and Turbine Wheel Inspection

15-46
Removal: Insert
Inspection procedure
Inspection: Shaft and turbine wheel
[Inspection]
(1) Journal outside diameter
• If the measurement exceeds the specified limit or uneven wear
is excessive, replace the shaft and turbine wheel uni
t.
• Inspect th
e journal visually and recondition it if roughened.
(2) Shaft bend
• Set a dial gauge at the illustrated position on the shaft. Turning
the shaft slowly, measure the extent of bending.
• If the measurement exceeds the specified limit, replace the shaft
and turbine wheel unit.
[Reconditioning]
• Attach the shaft and turbine wheel unit to a lathe, supporting it at
both centers.
• With the shaft and turbine wheel unit turning at 300 to 600 rpm,
smooth the journal using sandpaper (#400) and engine oil.
• Measure the outside diameter of the bearing contact portion. If
the measurement exceeds the specified limit, replace the shaft
and turbine wheel unit.
Inspection: Bearing
• If the measurement exceeds the specified limit, replace the
bearing.
TURBOCHARGER