My neighbor replaced the rolls in his self propelled version of this mower with ones from an almost brand new one in which the cutter bar and pan was sliced in half by a boulder stump. It took him nearly a week to get it apart and put it back together with lots of help. The rolls are VERY heavy and awkward to maneuver into place in their side panels. We were praying only that they were round (true) because he didn't/couldn't check first. Absolutely burn off the bearings, Why risk putting back in a bearing that has contamination, wear, roundness issues and persuassion marks on it? They are stock bearings at TSC and you can upgrade to sealed units. My other neighbor has a JD 1407 and liked it so much he towed it back to Missouri last November when he moved (on a trailer of course). Same aspects as the NH's: parts at TSC. Lots of dealers nearby in my neighborhood. All are willing to UPS parts to me.