Hi guys, I ran my 753 on Saturday, loading pieces of metal and moving empty totes around for about an hour. Every once in while I heard a metal thunk sound. All work was done on hard gravel surfaces. I have decent tires, inflated properly. When I parked it I stepped on the left front tire as I got out and noticed it moved. It was off the ground slightly and so I checked the play of the chain (I can move the tire about an inch before the chain tighten) which I didn't think was too bad. The bad part IMO is that the tire will move in and out of the axle tube just enough to feel the "thunk". Is there an adjustment or am I in for bearings and chains? No seals are leaking. I think that is the noise I hear when turning. Or maybe I'm being paranoid. Thanks in advance! Leo