The number of bearings on the cart depends on how old the machine is. older ones have 2 due to the way the rack gear pivots up when returning. On the older machine the cart pivots with the gear. On later machines the gear only pivots on the return thus being able to ues 4 bearings. The way to tell which you have with out looking at the bearings is to look at the ram itself. On both styles the rack gear bolts to the ram(my grand father welded his due to the bolts breaking), but the difference is how the ram and gear mount onto the cart. On 4 bearing models the ram/gear assembly fit into a groove on the cart with one big bolt holding them in place. the ram/gear pivot on that bolt. On the older models i believe the ram is part of the cart. One thing I forgot to mention re the spring is that the spring has a loop on each end. The loops hook the bearing bolts on the each side of the cart. On 4 bearing models the springs hook to the rear bearing bolt on each side. They run along the frame from one side around the back of the machine as I described in my last post along the frame up the other side. As for posting pics, I'm not that advanced. Only recently learned how to e-mail them. If you can post pics I can tell you what you have. SS is not a big company. Just a few employees and the head guy. No B.S. which is great. If they don't answer the phone, they are busy or not there. I have been to their place a number or years ago. I think they have since moved. The cart may be binding due to bad bearing(s), debris under the cart, or you may need shims between the cart and the plate the bearings bolt to. there is one plate on each side that bolt to the bottom of the cart.