Hi David
As NibbanaFarm rightly says, the tractor can be moved in neutral, with or without the engine running. I find with relative ease, as the wheels simply freewheel with only minor resistance from the drivetrain. When the tractor is in gear - and the clutch disengaged, I can't move it either - engine running or not. I used to think that this was only due to the high gear reduction ratio through the gearbox, but after having read Maxxjods description of the PowerSafe clutch in this thread, it might perhaps be a bit of both.
As you have probably seen already in this thread, the PowerSafe clutch has its advantages and disadvantages compared to the traditional cone clutch. I run my BCS 740 in the 3rd gear most of the time with a lawnmower or a sweeper, and I find it very handy, that the tractor is automatically braked when I empty the bag on the mower, or otherwise leave the tractor on a slope for a few seconds with the engine running.
Another issue is the use of trailers or sulkies on the tractors with the PowerSafe clutch. This is
not recommended by BCS, as the tractor comes to a very abrupt stop in the 3 working gears, when the clutch is disengaged (the clutch lever is pulled).
We have had this issue a few years ago, and based on the new information on the hydraulic clutch, I decided to do my little test from 2013 concerning the transport gear once again.
According to Maxxjod, the 4th worm gear is no longer in the gearbox at all, which means that the transport gear is gone for good on the new models. On the early BCS models with PowerSafe - like my 2011 model - it has just been blocked, as described earlier. Yesterday I did test it again, and as expected, the 4th gear does not have the "quick-stop" feature as the other gears, but freewheels to a comfortable stop, as with a conventional clutch. Depending on speed, slope and tractor weight, my tractor could easily freewheel 8-10 feet after the clutch was disengaged. Therefore, owners of early PowerSafe models might be able to enjoy the benefits of a fast - and safe - transport gear with a trailer or sulky, but be aware, that the 3 working gears are a different story!
Best regards
Jens