Quantcast b.  Inspection (Contd) - TM-9-2815-225-34P_193

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TM 9-2815-225-34&P 3-37.  CRANKSHAFT REPAIR (Contd) LOCATION/ITEM ACTION REMARKS b.  Inspection (Contd) pass within 0.1875 in. (4.763 mm) indications are acceptable. of a crankpin wall (1) hole are acceptable if 0.50 in. (12.7 mm) long or less and does not enter oil hole chamfer or intersect 45° ± 10° diagonal.  Only those subsurface indications that lay closer than 0.0625 in. (1.588 mm) to surface (measured at the chamfer at 45° + 10 diagonal) are not acceptable. 14.     Chamber of main bearing Light open indications that enter oil hole (14) chamfer of any chamber of main bearing oil hole (14) are acceptable if they are 3.125 in. (79 mm) or less. Subsurface indications ending in a main bearing oil hole (14) are acceptable. 15.  Crankpin (2) Fine subsurface salt and pepper- type indications are permitted on upper and lower sides of crankpins (2) on the trimming line. 16.     Main bearing journal Open longitudinal indications surfaces (15) of crankpins within main bearing journal surfaces (2) (15) which are less than 1.125 in. (29 mm) on main journals and 0.875 in. (22.225 mm) long on crank- pins (2) are acceptable after sharp edges have been honed 0.002-0.004 in. (0.051-0.102 mm) below journal surface. 17.     Main bearing journal Longitudinal surface indications surfaces (15) and connecting within area (15) or (19) are rod bearing crankshaft acceptable. journal surfaces (19) 18.     Fillet (4) a.  Parallel open indications that meet requirement of fillet (4) and other requirements on length and frequency are acceptable. b.  Indications that contain loose or foreign particles or voids left by such particles are not acceptable. 19.     Main bearing journal a.  Not more than three open In addition to showing minimum surfaces (15), crankpin (2), indications are to appear on any number of acceptable indications and fillet (4) one journal surfaces (15) or crank- for whole crankshaft, part also pin (2).  Scattered small, open, or shows many widely scattered subsurface indications, four per short indications, it must be crankpin (2), and six per main rejected. bearing journal surface (15), 0.125 in. (3.175 mm) long or less, if not forming part of a long inter- mittent indicator or entering an oil hole (1) or (14) or fillet (4), will not be counted as indications in arriving at the total number permitted. 19.  Main bearing journal b.  An inclusion which is 3-162


 


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