#
MAIN BEARING OIL CLEARANCE INSPECTION

BHE011010E00E01

1. Using a micrometer, measure the outer diameters of the inside main journal.

2. Using a cylinder bore gauge, measure the inner diameter of the stationary gear main bearing.

3. Calculate the main bearing oil clearance from the main journal outer diameter and the main bearing inner diameter.

  Main bearing oil clearance = (main bearing inner diameter) - (main journal outer diameter)

  • If it exceeds the maximum specification, replace the main bearing. (See MAIN BEARING REPLACEMENT.)

  – If the clearance is not within the specification after replacing the main bearing, replace the eccentric shaft.

  Standard main bearing oil clearance
  Standard power: 0.045-0.085 mm
  {0.0018-0.0033 in}
  High power: 0.055-0.075 mm
  {0.0022-0.0029 in}
  Maximum main bearing oil clearance
  Standard power: 0.1 mm {0.0039 in}
  High power: 0.1 mm {0.0039 in}