Walkera Dragonfly 4 Manual page 36

Jesus Bolt: The part that holds the main rotor on a helicopter. If you lose this, you're seeing
Jesus!
6) How to REALLY track the blades:
You need to tighten ALL setscrews using Loctite around the mainshaft and drive gear. This means they
all have to be taken out, Loctite applied and replaced. See the little bottle icon and where to apply. The
one­way clutch bearing on mine kept loosening due to the maker not putting Loctite there on both the
setscrews. Also on page 21 of the Walkera manual,every setscrew on the mainshaft on left side of the
page needs Loctite. Also see bottom of page 15. As it states, you cannot have any up/down play in the
shaft as all pitch/roll/yaw in the blades will shift immediately.
Do not Loctite the 4 screws on the tailtube behind the motor, just tighten them.
level with the servo arm, tighten up with Loctite. If it was close to level, just Loctite and tighten. I also
made all my setscrews face the same way this bottom one does so I get a look at all of them when
hand turning the shaft via the drive gear. Also, the lock ring just under the swashplate is supposed to
be down against the black plastic, not up inside the swashplate.
Switch 8 Consideration
: Another way is to just tighten it where it is and skip the Loctite
for now. Moving that little collar will throw off the factory preset, remembering of course the preset is