So you think the pump on one side of your ZTR may be bad, well maybe and maybe not. I have seen this more than a few times over the years and just seen it again today. It does not matter the make or model of your ZTR mower as this covers a wide range of makes and models. Before you go buying a new pump there is one thing you need to rule out first or you could end of with some very expensive egg on your face. It is something that is very easy over looked and I have seen it happen first hand. When a ZTR starts pulling to one side or is hard to turn to one side it seems every one blames the pump and it is not always the case. Check the front yokes and caster wheels. I have even went to the point of switching the whole yoke assembly form left to right just to have the problem jump to the other side proving the pump was not at fault. You may not go that far but just remember to check those yokes and casters wheels or you may be sorry. And to make matters worse they some times they need weight on them to show they are bad.