Quantcast Compression Test - TM-9-2805-257-14_178

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ARMY TM 9-2805-257-14 AIR  FORCE  TO  38G2-103-2 NAVY NAVFAC P-8-612-14E 5-24. Compression Test. This  task  covers: Test INITIAL  SETUP Tools General Mechanic’s Tool Kit (Item 1, Appendix B) Tester,  Cylinder  Compression  (NSN  4910-00-250-2423) (Item 2, Appendix B) NOTE This engine is equipped with two cylinders, the procedures for compression test is the same for both. Test. (figure 5-25) (1) (2) (3) (4) (5) (6) (7) Disconnect ignition cable (1) from spark plug (2). Remove spark plug (2) from engine (3). Install suitable pressure gage (4) in spark plug hole. Using  starter  rope  crank  engine  several  times,  and  check  pressure  gage. NOTE As  altitude  increases  cylinder  compression  will  decrease. Cylinder compression should be a minimum of 90 psi (63279 kpa) at sea level. Remove  pressure  gage  (4). Install spark plug (2), and connect ignition cable   (1). 5-54


 


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