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When did LCN stop spot welding the forearm tube of the regular arm on the 4000 series closer?
LCN 4000 series regular arm forearms were updated on August 20th, 2026.
This change will affect the 4010/4020/4110, 4040XP, 4050A, 4640, 4820, 5010, 5030, and 6400 series closers.
See below image for the visual difference- the bottom 3 are the new design (no spot weld).
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