18-30 Main Rotor Flight Control Rigging
NOTE
Refer to Section 5-33, and Figures 5-1 & 5-2 for standard rod
end adjustment procedures. Refer to Section 18-13 for main
rotor pitch link adjustment procedure.
For collective adjustments, both pitch links must be adjusted
exactly the same.
Track and balance helicopter per Sections 18-10 & 18-20 as
required after adjusting flight controls.
NOTE
Cyclic stick travel is non-adjustable. Travel is limited by A211-4
stop attached to the cyclic box assembly.
Collective stick travel is non-adjustable. Travel is limited by
A333-1 stop integral to the collective stick friction assembly.
Perform the following check to verify collective travel and
swashplate travel do not interfere.
1. Install MT559-1 rigging blocks inside A211-4 cyclic stick stop. Position collective stick
full down. Apply cyclic and collective stick frictions.
2. Rig the following push-pull tube assemblies and fork assembly, located between keel
panels, to the noted rod end center-to-center dimensions:
PART NUMBER DIMENSION
C121-1 = 51.15 ± 0.03 inches
F121-1 = 32.36 ± 0.03 inches
G205-1 = 5.40 ± 0.03 inches
3. Adjust length of F121-1 tube so that with collective full up, there is a 0.50 inch gap
between G205-1 yoke and F315-1 support.
4. Refer to Figure 18-8. Position MT146-4 swashplate rigging blocks between lower, non-
rotating swashplate and C281-1 fitting. Refer to Section 5-33, and adjust push-pull
tube rod ends until aligned with swashplate attachment holes.
5. Cut and discard ty-rap(s) as required to lift swashplate boot.
6. Position collective stick full up. Verify top of C201-1 ball assembly is flush with top
edge of C208-1 tube within 0.030 inch. Refer to Section 5-33, and adjust push-pull
tube rod ends in or out equally to raise or lower swashplate as required.
7. Refer to Figure 18-9. Adjust swashplate A205-5 lower fork assembly (non-rotating) to
3.70 ± 0.03 inch, and upper fork assembly (rotating) to 3.85 ± 0.03 inch.
25 OCT 2010 R66 Maintenance Manual Chapter 18 Track and Balance Page 18.21
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