Quantcast c.  Inspection (Contd) - TM-9-2815-225-34P_213

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TM 9-2815-225-34&P 3-39.  PISTON, CONNECTING ROD, AND BEARING REPAIR (Contd) LOCATION/ITEM ACTION REMARKS c.  Inspection (Contd) 12.     Two rod screws (8) a.  Inspect for distorted threads. Discard if threads are distorted. b.  Using suitable micrometer, Discard if less than wear limit measure smallest diameter. shown below: Thread O.D.  Wear Limit ............ 0.540 in. Pilot O.D.  Wear Limit ........ 0.6242 in. .................................................. (13.72 mm)  .................................(15.855 mm) (Refer to New Minimum ............................ 0.541 in ........................................... 0.6245 in. item 8 in .................................................. (13.74 mm)  .................................(15.862 mm) figure.) New Maximum  .......................... 0.545 in ........................................... 0.6250 in. .................................................. (13.84 mm)  .................................(15.875 mm) 13.     Connecting rod (5) Using suitable micrometer, Discard connecting rod assembly measure pilot bore of holes (4) if pilot bore is more than for rod screws (8). 0.6252 in. (15.880 mm). NOTE See Appendix F for screw pilot outside diameter. 14.     Connecting rod cap (7) Using suitable micrometer, Discard connecting rod assembly measure pilot bore of holes (4) if pilot bore is more than for rod screws (8). 0.6252 in. (15.880 mm). 15.     Two connecting rod a.  Inspect for cracking and Remove and discard if cracked or dowels (6) bending. bent.  Install new connecting rod dowels (6) if needed. b.  Using suitable micrometer, Remove and discard if less than measure diameter. 0.3127 in. (7.943 mm).  Install new connecting rod dowels (6) if needed. c.  Using suitable micrometer, Remove and discard if not within measure protrusion. limits shown below.  Install new connecting rod dowels (6) if needed. New Minimum  ................................................................ 0.220 in. (5.588 mm) New Maximum .................................................................. 0.250 in. (6.35 mm) 16.     Connecting rod (5) Using suitable micrometer, Discard connecting rod assembly measure diameter of dowel (4) if not within limits shown holes (11). below: New Minimum  .............................................................. 0.3128 in. (7.946 mm) New Maximum ............................................................... 0.3133 in. (7.957 am) 17.     Rod bushing (9) a.  Inspect for nicks, gouges, and Remove and discard if nicked, scoring. gouged or scored.  Install new rod bushing (9) if needed. b.  Using suitable micrometer, Remove and discard if less than measure inside diameter. wear limit shown below.  Install new rod bushing (9) if needed. Wear Limit  ................................................................. 2.0022 in. (50.856 mm) New Minimum  ............................................................ 2.0010 in. (50.825 mm) New Maximum ............................................................ 2.0015 in. (50.838 mm) 18.     Connecting rod (5) a.  Assemble. Ensure connecting rod dowels and connecting rod cap (7) (6) fit into dowel holes (11) in connecting rod (5). b.  Secure with two rod Alternately tighten screws (8) stews (8). In order aid sequence shown in illustration. 3-182


 


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