My bobcat(48) belt wb stopped a couple times while heading up hill, the engine ran fine, but it didn't move. It was wet at first, so I figured that may be the cause. But after my 3rd lawn, I figured everything was dry, but it did it again going up my rampgate. Do you think it was still wet, or something else? Any advice would be great. It's a 930010 model if that helps any, I think it's from 1997. Not sure about that though. Thanks.