TM 9-2815-225-34&P 3-37.  CRANKSHAFT REPAIR (Contd) LOCATION/ITEM ACTION REMARKS b.  Inspection (Contd) surfaces (15), crankpin (2), intermittently open to a subsurface and fillet (4) (Contd) shall be considered and measured as an open indication after original indication has been wiped off.  The entire modification must first meet requirements for subsurface limits. c.  Open and subsurface indications on counterweights and crank throw bevel outside critical region are acceptable. 20.     Crankpin wall (1) and Open seams on web periphery fillet (4) (21) that show visual depth on crankpin wall (1) may be removed from web periphery (21) with a 0.50 in. (12.7 mm) radius wheel, provided at least 0.0625 in. (1.588 mm) wall remains above crankpin fillet (4) after repair and balance limits are maintained. 21.  Crank web periphery (21) Seams or indications outside the critical region (6) that extend over crank web periphery (21) but are not visible on crankpin wall are acceptable. 22.  Corner of flank cheek (23) a.  Indications due to weld defects are not acceptable in counterweight welds.  Indications at corner of flank cheek (23) may be ground out and blended to a depth not exceeding 0.25 x 0.625 in. (0.635 x 1.588 cm) long. b.  Open longitudinal indications in flywheel and thrust flange fillets longer than 0.375 in. (9.525 mm) are not acceptable. c.  Limits of indications on the oil seal surface which, when wiped clean to not show sharp edges, are acceptable. d.  After inspection where coil shot is used, give crankshaft head shot to put magnetic poles at ends of crank, not throws.  The residual magnetic field should not exceed two units on magnaflux indication or equal. 3-164