Cummins — CYLINDER BLOCK - GROUP 01

Section 1 - Cylinder Block - Group 01 Connecting Rod - Magnetic Inspection (1-14) M11 Page 1-45 Measure the connecting rod bearing bore inside diameter at 45 degrees and at 90 degrees from the parting line. Connecting Rod Bearing Bore I. D. mm in 83.975 MIN 3.3061 84.025 MAX 3.3080 If any of the three measurements are not within the speci- fications, the rod must be repaired or replaced. Always tag a new connecting rod with the cylinder number of the rod being replaced. Connecting Rod - Magnetic Crack Inspection (1-14) Use a magnetic particle testing machine to check the connecting rod for cracks. NOTE: The connecting rod and cap must be assembled.

Use the residual method and apply head shot amperage. Apply the amperage to 1500 ampere D.C. or rectified A.C.. Visually inspect the connecting rod for cracks. Use the residual method and apply coil shot amperage. Amperage (Ampere Turns) MIN 2600 D.C. or rectified A.C. MAX 2800 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 connecting rod for cracks.