tjvickery wrote:I have an old toro workmaster 3 wheel utility cart I'm working on. Can't find the ID plate. It has the K321 Engine year 1984. Anyone know what type fluid goes in the hydrostatic drive? It does have a large Wix filter 51553
I know this is a super late reply, but if you haven't found anything yet, Toro says it requires a 10-40 engine oil. I had my Hydro rebuilt, and the guy that did it highly suggested running an anti foaming agent along with it. Hope this helps!