Section 1 - Cylinder Block - Group 01 Crankshaft Magnetic Crack Inspection (1-07) M11 Page 1-31 A minimum of three successive head shots are required for each section of the crankshaft. Flow the bath solution over the first one-third length of the crankshaft and apply three head shots of magnetizing current. NOTE: Turn off the flow of bath solution before the third head shot of current is completed to prevent washing the metal particles from the crankshaft. Inspect the first one-third section of the crankshaft. Refer to ‘‘Magnetic Inspection’’ in this procedure for reuse guidelines.
Flow the bath solution over the second one-third length of the crankshaft and apply three head shots of magne- tizing current. NOTE: Turn off the flow bath before the third head shot of current is completed to prevent washing the metal particles from the crankshaft. Inspect the second one-third section of the crankshaft. Refer to ‘‘Magnetic Inspection’’ in this procedure for re- use guidelines. Flow the bath solution over the last one-third length of the crankshaft and apply three head shots of magnetizing current. NOTE: Turn off the flow of bath solution before the third head shot of current is completed to prevent washing the metal particles from the crankshaft.
Inspect the last one-third section of the cranskhaft. Refer to ‘‘Magnetic Inspection’’ in this procedure for reuse guidelines. Coil Shot (Circumferental Magnetization) Apply the magnetic bath solution and magnetize thecrank- shaft in a 514.35 mm [20.249 inch] inside diameter coil or equivalent using 3600 to 4000 ampere-turns with direct current or rectified A.C. NOTE: Ampere-turn is the amperage flowing through the coil multiplied by the number of turns in the coil.