IF 3 pt arms seem stuck "up" #1 draft control lever, #2 3pt speed dial at your feet. I seem to frequently get mine in that condition and the speed setting seems to adjust itself in from vibration or I'm always inadvertently hitting it with my heel.....But something I do often on this machine is have something hanging off the 3pt stuck up in the air. One of those 2 always fixes it...
If you search back a few pages you can see all the p/n and where I bought all the stuff for the 50 hr service.
If you need to fold the ROPS frequently, replace the lovely shoulder bolts & nylock nuts with long handle pins. There's still some play though since the holes in ROPS for that hardware is slightly oversize - ROPS will make a slight buzzing vibration noise at certain RPM if 2/4 bolts are replaced with pins. SO for me it's a matter of which is more of an annoyance
IF you are the heaviest operator and you adjust the seat suspension to where it will not bottom out on the hardest bumps, you kids/spouse/neighbor etc might find the machine not starting or frequently just cutting off "for no reason" when they use it. I'm ~190 lbs, wife is ~130 & that's enough difference that I either let seat bottom out and I take a jolt on a good bump or she has to fiddle around cranking that knob to readjust for her weight.
If not using a powered grease gun, the lower zerk up front at the pivot point is very stubborn. But If I lift the front tires off ground with loader, it is much more reasonable with a hand grease gun.
Auto PTO can fool you.....you finish tilling/bush hogging/whatever and raise 3pt and that cuts off PTO and sort of forget about it while doing other stuff.....but the PTO button is still engaged. SO you're thinking "PTO is off" (since it isn't spinning), but is still engaged and machine will not restart. Easy mistake to make and then wonder why your machine won't crank. I find that feature actually kind of nice to use tilling since I don't run at full 540 PTO RPM with the tiller....but with a bush hog it doesn't really do anything for me since I have to reduce the RPM to reengage PTO anyway, so just stopping it from spinning when I need to be at high RPM isn't really a convenience feature to me for that task.
You'll find some of the other features that way too - convenient for some tasks, better to be left off for others. Just depends on what you do and how you like the machine to behave.
Lastly, I'd recommend setting the HST response dial right in the middle if it wasn't delivered that way. Then adjust from there if you don't like the way it takes off from a stop or comes to a stop when letting off the HST pedal. Lots of range there to make it behave just like you want, but if delivered fully one way or the other could fell very "off".