Assembling The Main Rotor Head - GRAUPNER heim UNI-Mechanik 2000 Mode D'emploi

UNI-Mechanics 2000

3. Assembling the main rotor head

(bag U2-10)
The main rotor head is assembled as shown in the illustrations. Remember to grease all
ballraces.
3.1 Preparing the rotor blade holders
(bag U2-10A, U2-10B)
First attach the two linkage balls to the mixer levers 4448.132A using M2 x 10 screws, then
press the ballraces into both sides, not forgetting the brass spacer sleeve between them.
Apply a little thread-lock fluid to the M3 x 16 screws along the entire length of the threads, and
fit these through the ballraces and the spacer sleeve; take care that no thread-lock fluid gets
into the bearings. Screw the mixer levers to the blade holders in this way, and check that the
brass spacer washer is fitted between the inner ballrace and the blade pitch arm. The mixer
levers should now rotate freely in their bearings; if necessary lubricate them with silicone oil.
Press the radial bearings 4607.31 and the bearing disc of the thrust bearing 4618.3 into the
blade holders as far as they will go, as shown in the illustration.
Now check that the bearings 4607.31 in the prepared blade holders are an easy sliding fit on the
blade pivot shaft 4682.29. If necessary relieve the blade pivot shaft by rubbing down with fine
abrasive paper (600-grit or finer) until the bearings are a smooth sliding fit.
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