That's the Gwinnett Woodworking site out of Georgia. Pushing down on the top linkage does nothing. The arms are mechanically held and unless you have ruined the linkage, you can't get them any closer. You need to look at the Dewalt maintenance videos, specifically Bob Brokaw's, to get instruction on how to disassemble and maintain the saw. I suspect that your problem is involved in setting the tension with that little lever on the upper arm. If you can get the blade connected in both the top and bottom blade holders, that tension control will tighten it right up. Now if it isn't tight and the tension control is all the way to the left, then your blade holders are slipping and that's an entirely different problem. No matter what, the Gwinnett club's videos will show you how to correct it.
