Recently change the lower drive belt on my MTD Yard Machines (13AN601H729). When I attempted to operate the mower, reverse works fine; however, forward won't engage unless I hold shift lever forward (see photos). I'm not entirely clear as to what I should be fixing as the difference between forward and no forward is merely some pressure to the shift lever.
Both upper and lower belt should be replaced at the same time with the OEM belts. If one belt it worn more than the other then you get problems like that.
Both upper and lower belt should be replaced at the same time with the OEM belts. If one belt it worn more than the other then you get problems like that.