The discontinued LCN Sentronic 4010SE arms are still available, and we now have them online.  The 4010SE was discontinued in the late 1990’s, but a little known fact is LCN will still make them.  They are offed in Aluminum and Dark Bronze, but we could also order them in the Statuary, and Brass finished if you would like.   If you have an older model 4010SE, and are having issues will it holding the door open, you can replace the track with the 4040-3038 LCN Sentronic Track Assembly, and that will solve that problem.  The 4010SE arms are very similar to the 4040 Arms, but the hole in the arm were it attaches to the hydraulic spindle are a different shape.  If you are having issues with your older 4010SE Sentronic Door Closer call or email our door closer experts