At 13 months old (45 hours), the mower deck spindles exploded. The upper and lower bearings sealed so lube at the fitting just produced hydraulic pressure.
At 55 hours, the bearings failed in three deck pulleys.
At 90 hours, the bearings failed in the clutch that engages the blades. In the above two items you must replace the complete assemblies as the bearings are not serviceable.
At 150 hours, the transaxle failed. I had to replace the steering gears three times.
In 200 hours, I have replaced the three deck pulleys twice to current hours.
The tractor still looks like new (washed after every cut and stored inside) but it will be my last John Deere. I was an extremely costly mistake!