GRAUPNER heim UNI-Mechanik 2000 Mode D'emploi page 81

UNI-Mechanics 2000
Fit the screw, with the bellcrank mounted on it, into the shoulder of the tail rotor housing and
screw it in by a few turns, but do not tighten it at this stage since the control bridge must first be
fitted as described in the next section.
Press the ballrace 4607.137 into the control ring 4618.62 as far as it will go. Apply a little thread-
lock fluid to the assembly (don't let it run between the control ring and the control sleeve!) and
push it onto the control sleeve (from 4618.61) until the inner ring of the ballrace rests against the
flange of the sleeve.
Attach the two ball-links 4618.55 to the control bridge (from 4618.61), then slide it onto the
control sleeve and press it against the inner ring of the other ballrace. Press the shakeproof
washer 1291.26 onto the control sleeve and up against the control bridge.
Now check that the control ring can revolve freely on the control bridge, but without any hint of
axial play. If the ring is stiff to move, then there is probably tension between the two bearings.
This can usually be eliminated by tapping them with the handle of a screwdriver.
Fit the control bridge on the tail rotor shaft, then press the bellcrank over the ball on the control
ring, and tighten the M3x20 screw.
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