I'm new to this forum, I have an established lawn fertilizing business. This year I bid and got a large mowing contract for a local factory. I went out and bought a JD F925. I don't want this to turn into a discussion on my mower selection, I bought it because it was priced right and it works for the specified property. What I am curious about is how often I should be greasing and what other preventive maintenance should be done on a large mower like this? It's a 1995 model 3cyl. Yanmar diesel (about 1400 hours) with a 60" front mounted deck. BTW I almost rolled it over doing a turn too fast on pavement the other night.