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CYLINDER BLOCK INSPECTION/REPAIR

BME011010300601

1.• Measure the distortion of the cylinder block top surface in the seven directions as shown. Replace in necessary.

Maximum cylinder block distortion

  X direction 0.01 mm {0.0004 in}
  Y direction 0.03 mm {0.0012 in}

2. Measure the cylinder bores in X and Y directions at three levels (A,B and C) in each cylinder as shown.

3. If the cylinder bore exceeds the wear limit, replace the cylinder block or rebore the cylinder and install the oversize pistons so that the specified piston-to-cylinder clearance is obtained.

  Note

  • Base the boring diameter on the diameter of an oversize piston. All cylinders must have the same diameter.

Cylinder bore

(mm {in})

Size | Diameter
--- | ---
Standard | 86.000-86.022 {3.3859-3.3866}
0.25 {0.01} oversize | 86.250-86.272 {3.3957-3.3965}
0.50 {0.02} oversize | 86.500-86.522 {3.4055-3.4063}

Wear limit

  0.15 mm {0.006 in}