44b33013_ble_Seam_Troubleshooting_Guide__Suggested_Remedy
[Probable Cause] On 60L seamers, 1st & 2nd Operation Seaming Rolls are sluggish in returning to their offseam position, letting the lower lip of the Seaming Roll make contact damaging cover curl & can flange while on the rise up to the Seaming Chuck. [Suggested Remedy] 
The 60L & 41L Seamers are designed with an Open Seaming Cam versus a box type on other seamers. Free movement of Steaming Lever Shafts is important. Check Seaming Lever Shaft endplay in the Upper Turret. The 60L should have approximately .005 of an inch endplay. The 41L should be approximately .002 to .003 of an inch of endplay. Check for broken or missing Seaming Cam Lever Return Springs. Replace if necessary.
Knocked Down Flange | Cause & Remedy | Double Seam Troubleshooting Guide
Suggested Remedy