9.
MAINTENANCE
A. DISASSEMBLY
1)
Remove the rotors. To remove a rotor:
a)
Unplug the power cord from the command line.
b)
Pull the black plastic dome off the shaft.
c)
Carefully lift the rotor off, taking care not to bend the brushes on the underside
of the hub. Don't mix up the two rotors!
2)
Lift off the helicopter body, carefully easing it over the slip-ring panels at
the base of each rotor shaft. The interior parts will now be fully revealed.
3)
To remove the electronic circuit board, first unplug the two connectors.
Next, detach the board by cutting through the double-sided foam adhesive
along the top edge, using a sharp knife. The foam can then be peeled off.
B. REASSEMBLY
Reassembly is the reverse of disassembly. Please note the following:
a)
When replacing the
body, take care to
position the navigation
lights.
b)
When replacing each
black plastic dome, it
should push the rotor
down against spring
p r e s s u r e f r o m t h e
brushes. The correct
position is reached when
there is about 0.5mm of
clear shaft visible below
the circuit
board
disc
(Photo 3)
C: SLIP-RING LUBRICATION
Each rotor receives power to drive its motors via a system of slip-rings
etched onto a small circuit board at the base of the shaft. Brushes on the
rotor hub run on the slip-rings, and from time to time they need lubrication.
This is done by applying graphite (a good electrically conductive lubricant)
using an ordinary pencil. Please note the following:
Photo 3: Rotor Clearance
3
0.5mm
clearance
9
Summary of Contents for chinook
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