I've had my tractor for many years and the only problem I ever had is that water pumps seem to die every few years. Lack of use could be factor. A repair kit is available for around $40 and I can repair in a couple of hours.
Best tractor I ever owned. I have had several and grew up on a farm. Most fuel eff. tractor I ever used. It is about 47 HP but will bush hog all day on 5 gallons of diesel. It has power steering, differential lock, two speed PTO, and remote hydraulic connections. It starts and runs every time, does not smoke at all. First diesel I ever had that did not smoke under a load.
I love my Case David Brown, but wish it was a 4x4. I paid $2500 for this tractor and a new Woods bush hog about 20 years ago. I got a bargain of a life time.
Still a great tractor and will do anything a brand new 2x2 will do and better fuel economy than anything I know about. Parts and dealers are becoming scarce, but I can still order on line.