Robinson Helicopter Company RTR 660, Maintenance Manual

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67-73 F316-1 Bellcrank (continued)
B. Installation
1. Install one A141-3 washer on C494-2 shaft adjacent to both inboard and outboard
end of F316-1 bellcrank.
2. Install bellcrank with washers in helicopter with longer arm pointing up.
3. On inboard end of C494-2 shaft, install two NAS1149F0463P washers followed by
MS17825-4 castellated nut. Tighten nut until it aligns with hole in shaft and install
new MS16562-14 spring pin.
4. On outboard end of shaft install C130-34 spacer and MS21042L4 nut. Special
torque nut to 90 in.-lb. Install palnut and special torque per Section 20-33. Torque
stripe inboard and outboard nuts per Figure 5-1.
5. Connect F121-13 push-pull tube to bellcrank and standard torque bolt per Section
20-32. Install palnut, special torque per Section 20-33, and torque stripe per Figure
5-1.
6. Connect F121-11 push-pull tube to bellcrank and standard torque bolt per Section
20-32. Install palnut, special torque per Section 20-33, and torque stripe per Figure
5-1.
7. Move pedal full travel. Verify smooth movement and no interference.
8. Install main rotor gearbox per Section 63-20.
67-74 A331-4 Bellcrank
A. Removal
1. Disconnect F121-13 and C121-17 push-pull tubes from A331-4 bellcrank.
2. Disconnect NAS6604-35 attach bolt and remove bellcrank and two A105-3
journals.
B. Installation
1. Install two A105-3 journals in C331-4 bellcrank's pivot bearings. Install an
NAS1149F0432P washer under head of an NAS6604-35 bolt followed by an A141-
3 washer and insert bolt thru journals. Install an A141-3 washer on bolt against
journal face, followed by an NAS1149F0432P washer.
2. Install bellcrank, with straight side aft, on F020-1 frame's boss, and secure to frame
with an NAS1149F0432P washer and MS21042L4 nut. Standard torque bolt per
Section 20-32. Install palnut, special torque per Section 20-33, and torque stripe
per Figure 5-1.
25 OCT 2010 R66 Maintenance Manual Chapter 67 Flight Controls
Page 67.23