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ROTOR INSPECTION

BHE011011B10E01

1. Inspect the rotor and side housing clearance according to the following procedure:

  • If it is less than the minimum specification, replace the rotor.
  (1) Measure the width of the rotor housing in the position shown in the figure using a micrometer.

  Caution

  • Move the sheet metal piece out of the way when measuring.

  (2) Measure the rotor width at various positions around the rotor round periphery using a micrometer.
  (3) Compute the rotor and side housing clearance using the measurements from (1) and (2).

  Rotor and side housing clearance = (rotor housing width) - (maximum rotor width)
  Standard clearance
  0.05-0.19 mm {0.0020-0.0074 in}
  Minimum clearance
  0.05 mm {0.002 in}

2. Measure the protrusion of the rotor round using a straight edge and a feeler gauge.

  Caution

  • Measure the the protrusion of the rotor round in the three apexes of the rotor on both the front and rear sides.
  • Because the rotor round has two levels, be careful not to measure the level difference of the middle level.

  • If it is less than the minimum specification, replace the rotor.

  Standard projection
  0.12-0.18 mm {0.0048-0.0070 in}
  Minimum projection
  0.1 mm {0.0039 in}

3. Inspect the corner seal groove of the rotor by inserting the SST.

  • If 1/2 or more of either end of the SST can be inserted into the seal groove, replace the corner seal.
  • If 1/2 or more of both ends of the SST can be inserted into the corner seal groove, replace the rotor.

  Caution

  • Do not push the SST in with force.
  • Keep the SST perpendicular to the seal groove.
  • When replacing the corner seal, replace with one that matches the S or L inscription on the rotor.

4. Measure the clearance between the apex seal groove and the apex seal using a feeler gauge.

  • If it exceeds the maximum specification, replace the apex seal.
  • If the clearance is still not within the standard after replacing the apex seal, replace the rotor.

  Standard clearance
  0.042-0.101 mm {0.0017-0.0039 in}
  Maximum clearance
  0.15 mm {0.0059 in}