How to adjust a standard door closer speed? Dorma Door Closer 669g
How to shut commercial door harder: adjust closer's TOP-screw COUNTERclock wise 45 degrees at a time 669G 12 in. x 3/4 in. Commercial Door Closer, Low Profile Cover This video is your guide to fine-tuning various settings on the dormakaba TS93 overhead door closer and all you need is a ...