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Short Cover Hook
Probable CauseSuggested Remedy
Loose 1st Operation Seaming Roll setting.Make adjustments. See Parts List Instructions or Service Manual for procedures
Deep countersink, or excess metal used in countersink limits the amount of metal available for cover hookSee the section on ‘Deep Countersinks’ in the next section
Loose 2nd Operation Seaming Roll SettingMake adjustments. See Parts List Instructions or Service Manual for procedures
Worn 1st Operation Seaming Roll groove profileReplace 1st Operation Seaming Roll
1st Operation Seaming Roll groove too wideReplace 1st Operation Seaming Roll with a Roll having a more narrow groove profile
Insufficient seaming stock caused by too small a cut edge diameter in making of coverDiscuss with Cover Manufacturer
Excessive Lower Chuck Spring pressureReduce spring pressure in Lower Chuck Assemblies. See the section on Long Body Hooks.
Worn 1st Operation Seaming Roll Bearings or Roll PinReplace worn tapered roller bearing or Seaming Roll Pin. Make adjustments. See Parts List Instructions or Service Manual procedures
Worn Seamer Lever Shaft upper and/or Lower Turret Bushings.Check Service Manual for allowable tolerances and replace Bushings if beyond these limits
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