Rotor Bearing Oil Clearance Inspection

ROTOR BEARING OIL CLEARANCE INSPECTION





1. Measure the outer diameter of the rotor journal using a micrometer.

Caution
^ Measure the rotor journal at a point slightly off center since the center section is raised. Do not measure at the center because it does not contact the rotor bearing.





2. Measure the inner diameter of the rotor bearing using a cylinder gauge.





3. Calculate the rotor bearing oil clearance from the rotor journal outer diameter and the rotor bearing inner diameter.
Rotor bearing oil clearance = (rotor bearing inner diameter) - (rotor journal outer diameter)

^ If it exceeds the minimum specification, replace the rotor bearing.
^ If not within the specification, even with the rotor bearing replaced, replace the eccentric shaft.

Standard rotor bearing oil clearance
0.06-0.08 mm (0.0024-0.0030 in)
Maximum rotor bearing oil clearance
0.1 mm (0.0039 in)