91measurNX2.doc
Page 3
Latest update: 8 Jan-03
9.1.3
REPLACING PROPELLER, Part.No 20091
Dismantling
a) Unscrew the four screws fixing the nose cone.
b) Lift off the nose cone.
Be careful, so that the opto elements are not damaged or displaced.
Turn the direction of the housing to 135° - 180° before lifting off the nose cone.
c) If the defect propeller is still on the axis try with a pointed but strong pliers to
keep the axis fixed when unscrewing the old propeller off. Keep the pliers
between the ball and bearing without moving the ball as that will change
function and calibration.
Put a little glue in the thread of the bolt in the new propeller and screw it tight on
the axis.
If the old propeller can not be removed without displacing the ball or
damage the nose cone replace the complete Nose Cone, see § 9.1.4.
Re-assembly
a) Put a very thin string of silicone glue Place the four screws and new gasket,
art.no 19478. The gasket must be placed against the back side of the cone.
b) Mount the screws and put the nose cone in place. Ensure that gasket is not
twisted round any screw.
Important:
Remove the wind vane. Check that the opto element is not in contact
with the ball or head when turning the head 360E. See illustr. below.
9.1.4
REPLACING NOSECONE, Part.No 20727
Dismantling
a) Unscrew the four screws fixing the nose cone.
b) Lift off the nose cone.
Be carefull, so that the opto elements are not damaged or displaced.
Turn the direction of the housing to 135° - 180° before lifting off the nose cone.
Re-assembly
a) Put a very thin string of silicone glue Place the four screws and new gasket,
art.no 19478. The gasket must be placed against the back side of the cone.
b) Mount the screws and put the nose cone in place. Ensure that gasket is not
twisted round any screw.
Important:
Remove the wind vane. Check that the opto element has a space of
1,0 to 1,5 mm to the ball all around when turning the head 360°. Also check that
the opto element do not touch any part of the head.
Min. 1mm.
Max. 1,5 mm
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