I am looking for the repair manual for a Yard Man hydrostatic lawn tractor, model #134X694G401. Do you have this manual? I can't find it in your manual list and am wondering if I'm just looking in the wrong place. The problem I'm having is once the mower is warmed up, it won't drive forward if it's going on a side hill or going up hill while cutting. It doesn't make any difference if the mower is off or on. When it's first turned on it works just fine.