McClintock Posted December 6, 2010 Share Posted December 6, 2010 (edited) Hi, all. I just wanted to post the question before I actually call Dillon about a problem I noticed yesterday with loading 9mm on a 550b. I noticed that the link arms (part numbers 13747 (right) and 13583 (left)) appear to wobble a bit on their shafts, which causes the primer punch hole in shell plate platform to move when returning the operating handle to the top of the stroke to seat a primer. The primer seating cup then binds up, as it's not properly aligned with the hole in the shell plate platform due to the twisting of the link arms (mostly noticeable on the right side, but a little on the left one as well). I don't recall seeing this sort of play before. When I first got the press (used), it was very tough to cycle, so I took it all apart and noticed that the link arms were galled, so I cleaned them up and polished them, after which it ran like a top for approximately 4,300 rounds.... until yesterday. Just wondering if anyone else has noticed this sort of thing happening to them. Any information would be greatly appreciated. Cheers! McClintock Edited December 6, 2010 by McClintock Link to comment Share on other sites More sharing options...
George Tucker Posted December 6, 2010 Share Posted December 6, 2010 One of my 550 Dillons done the same thing, sent it to Dillon, they rebuilt it, like new now, and works perfect, George. Link to comment Share on other sites More sharing options...
dillon Posted December 7, 2010 Share Posted December 7, 2010 On your machine, how are the link arms attached to the crank- C-clips or nylock nuts? Link to comment Share on other sites More sharing options...
McClintock Posted December 7, 2010 Author Share Posted December 7, 2010 They are attached to the crank via C-clips. However, I see that most of the wobble appears at the top, where the link arms are connected to the frame via the link arm pins 13834 (left) and 13881 (right). I am guessing, as I haven't taken the machine completely apart yet, but because I can see the wobble at the top of the link arms, that the holes at the top of the link arms have become slotted, allowing for extra play in the fit. Hope that helps! Cheers! McClintock Link to comment Share on other sites More sharing options...
ak47traxx Posted December 7, 2010 Share Posted December 7, 2010 My 550B is doing the same thing and mine has the nylock nuts. Link to comment Share on other sites More sharing options...
dillon Posted December 7, 2010 Share Posted December 7, 2010 Nylcok nuts can be tightened to take up for play. With the older versions with C-clips, there are bowed washers between the inside of the link arm and the crank. You probably need to add an additional one to each side. Phone or e-mail us and we'll mail them to you. If you e-mail us, please be sure to include your address. Link to comment Share on other sites More sharing options...
ak47traxx Posted January 3, 2011 Share Posted January 3, 2011 This helped mine. Thanks for the info. Link to comment Share on other sites More sharing options...
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