Loose 1st Operation Seam
1st Operation Seams - Cause & Remedy

If the 1st operation seam is too loose, the Cover Hook will be away from the can body having a noticeable gap all around. There may not be enough of the cover curled up inside to create a sufficient Cover Hook and Overlap.

Loose-1st-Operation-Seam Loose-1st-Operation-Seam-body-wall-fractures
Probable Cause Suggested Remedy
1st Operation Seaming Roll too loose Tighten 1st Operation Seaming Roll. See Parts List & Instructions or Service Manual for adjustment procedures
1st Operation Seaming Roll groove profile worn Replace the 1st operation Seaming Roll
1st Operation Seaming Roll groove profile too wide Replace 1st Operation Seaming Roll with a narrow groove profile.