A 3038 has electric pto switch that turns on a solenoid valve which turns on hydraulic oil pressure to the pto clutch. Electric over hydraulic some people would call it. There is a pto brake that is engaged when the pto clutch is disengaged so the pto shaft will not turn when it is turned off. Without the brake, viscous drag in the hydraulic pto clutch will cause the output shaft to turn slowly or "creep". Problem is, the brake won't let you turn it by hand either. Some tractors with electric pto also have a pto shift lever so that the pto output shaft can be mechanically disengaged from the pto clutch and brake to allow you to easily turn the shaft to make hooking up implements easier. Sort of a neutral as others have said, but unfortunately, a 3038 does not have this feature. Some of the MT3 series do. Certain implements are easy to turn by hand so you can turn the implement pto shaft instead of the tractor shaft. Other implements are next to impossible to turn by hand without sticking a bar through the universal joint to give you some leverage. When hooking up a tiller, raising it up off the ground with the hitch first will make it easy to turn and attach the shaft, since you can't turn it with the tiller on the ground.