Can't recall the PoH limitation, but it makes sense to use the hyds if they're there, cos it makes life sooooo much easier.
generalspecific:
Someone wrote off a Scout (yes, not an R44, bear with me) when they felt a cyclic restriction in pitch, and switched off the hydraulics then switched them back on again without controlling the aircraft first. Accident report
here - turns out the Pilot's Assistant's map was restricting rearward movement of the cyclic. Moral - think before acting.