I just saw your thread and see you have purchased a Gravely ZTR. I have a 148Z with the 21 hp engine, and hydraulic deck lift. I bought it around 2004, and it replaced a 50" Gravely riding tractor that was 25 years old, and had 1300 hours on its Onan engine, which siezed. I'm a lifeling Gravely fan, going back to the Model L, and find the ZTR to be an excellent machine. I have 460 hours on it, and find it to be reliable. I had two minor issues, very early on. The bolt holding the safety clutch to the motor shaft came loose, fell out actually, and I had to replace it using Loktite. Fortunately, the clutch wasn't damaged. I also had the drive belt wear through one of the hydraulic hoses, and replaced that. I'd say both problems were just odd assembly oversights. The machine has been bulletproof since then. I find it to be extremely rugged, like the old Gravelys, and have only done the normal oil changes and blade sharpening over the last 7 years or so.