GRAUPNER 4449.RXN Bedienanleitung Seite 62

UNI-EXPERT mechanics
since '04 series
1.10 Collective pitch compensator and swashplate
(bag UM-8,UM-9)
The collective pitch compensator 4618.47A is assembled as shown in the drawing. First fit a
circlip on each of the brass rods, and glue them in the holes in the collective pitch compensator
hub 4618.46 using bearing retainer fluid, ensuring that the circlips engage fully in the recesses.
De-burr the collective pitch compensator arms and slip them on the projecting ends of the brass
rods, fitting at least one shim washer between the hub and the arm in each case. Note that the
arms must be free to rotate on the rods; de-burr the holes if necessary. Fit the outer circlips, and
check that there is no axial play in the arms on the rods; if there is detectable play, extra shim
washers must be fitted.
Make up three pushrods as shown in the drawing, using the threaded rods 4450.51 (2 mm Ø,
75 mm long) and six ball-links 4618.55. The stated dimension refers to the actual clearance
between the ball-links, as shown.
The first pushrod is fitted to the rear linkage point on the swashplate. Slip the ball-link over the
guide pin on the swashplate 4682.45 and snap it onto the linkage ball. Now fit the brass sleeve
(from 4618.113) onto the guide pin and grease it well. Slip the swashplate onto the main rotor
shaft, routing the attached pushrod down through the opening behind the dome bearing holder;
at the same time carefully ease the swashplate guide 4618.113 back, so that the brass sleeve
on the swashplate guide pin engages in the channel in the swashplate guide.
Fit the collective pitch compensator on the main rotor shaft, and press the two ball-links onto the
appropriate linkage balls on the swashplate inner ring, as shown in the drawing.
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