Section 1 - Cylinder Block - Group 01 Camshaft - Magnetic Crack Inspection (1-18) M11 Page 1-55 Use a magnetic particle testing machine to check the camshaft for cracks. Use the head shot method. Adjust the machine to 2000 ampere D.C. or rectified A.C.. Use the continuous method. Do not wet more than one-third of the camshaft at a time. Visually inspect the camshaft for cracks. Use the coil shot continuous method that is a minimum of 305 mm [12 inch]. Apply the coil shot. Amperage (Ampere Turn) MIN 3600 D.C. or rectified A.C. MAX 4000 D.C. or rectified A.C. NOTE: Ampere turn is an electrical current of one ampere flowing through the coil, multiplied by the number of turns in the coil.
Visually inspect the camshaft for cracks. Definitions of Indications Definitions of indications are as follows: Open indication - An indication is open if, when wiped clean of magnetic particle bath, it can be seen with the naked eye in a well lighted area. Many times an open indication can be felt with a fingernail.