Thanks guys. I'll be tackling it in a couple of days after Rick takes the forge off the transmission jack I have it on and moves it to my workbench. I'll let you know how it goes.

Added 24 days later:

To all who offered advice, I finally got all six burners up and running, after much cursing and some blood (the sheet metal has sharp corners!). Just to demonstrate my ability to make everything harder than it needs to be, I took the thing completely apart. I thought the burner orifices would be in the tubes, so I took all of the tubes out. Only then did I notice that the orifices were in the square bar at the top. Took the orifices out, but they looked clean. Blew out the tube, there was a little rust, but very little. Then put it all back together, but lining up the orifices with the tubes was a bitch, since you can't see the orifice when you do it. I also noticed that when you take the tubes off, a ratchet won't fit and you can only get about an eighth of a turn on a wrench. So disassembling and reassembling took hours, leading to much cussing. I also cracked the lining on the top, but it held together and seems to work fine. The flame on the top was from the quick-light. There is a hole in one of the tubes for it and since the ceramic part cracked and fell off, it left an open hole in the tube. The quick light stopped working shortly after I got the forge so I light it manually. I'll look for something to plug the hole, so that should be solved. I was really amazed when I put it all back together and it actually worked with no additional fiddling.

Thanks to all that offered advice!

Linda

Added 2 minutes later:

One thing I noticed is that there is no mark on the bar to use to line up the orifices with the tubes. If I ever take the bar and orifices out again, I'll mark the tube where I can see it to line up the orifices with the middle of the tube.