TM 5-4320-300-14 6-10.  PISTONS AND CONNECTING RODS (CONT) Location/Item Action Remarks Ring Minimum Maximum Limits inch (mm) inch (mm) inch (mm) Compression: No. 1 (Top) 0.020 (0.508) 0.046 (1.168) 0.060 (1.524) No. 2 0.020 (0.508) 0.036 (0.914) 0.060 (1.524) Oil control (all) 0.010 (0.254) 0.025 (0.635) 0.044 (1.118) 23.  Piston ring Check side clearance of side clear- piston rings in grooves. ance Compare dimensions to the chart below. Ring Minimum Maximum Limits inch (mm) inch (mm) inch (mm) Compression: No. 1 (Top) 0.003 (0.0762) 0.006 (0.1524) 0.010 (0.254) No. 2 0.007 (0.1778) 0.010 (0.254) 0.014 (0.3556) No. 3 and 4 0.005 (0.127) 0.008 (0.2032) 0.013 (0.3302) Oil control (all) 0.0015 (0.0381) 0.0055 (0.1397) 0.008 (0.2032) REPAIR 24.  Piston Replace piston if tin plate or ring grooves are excessively worn or damaged, ring lands are damaged, piston is heavily scored or cracked, or piston shows signs of excessive overheating. 25.  Cylinder If worn or damaged, repair or replace in liner accordance with paragraph 6-8. 6-85