64-10 Tail Rotor Assembly (continued)
B. Installation
1. Refer to Figure 64-1. Position tail rotor assembly on tail rotor gearbox output shaft.
Verify tail rotor is installed for clockwise rotation when viewed from left side of aircraft.
Verify blades cone toward tail rotor gearbox.
2. Remove tags, and match tail rotor blade serial number to corresponding pitch link.
Install teeter hinge bolt; tighten nut until elastomeric bearing metal spacers contact
output shaft, but do not torque.
3. Install dynamic balancing hardware securing tail rotor blades to pitch links, as removed.
Standard torque nuts & palnuts per Section 20-32, and torque stripe per Figure 5-1.
NOTE
If dynamic balancing hardware information is unknown, install
standard hardware for initial dynamic check.
4. Fabricate a tracking aid using 1x12-inch aluminum sheet; make a 90º bend 2 inches
from one end. With tail rotor horizontal, tape tracking aid to tailcone near blade tip.
5. Rotate tail rotor drive shaft and mark tracking aid where each blade tip drain hole
passes. Adjust (teeter) tail rotor until both blade tips pass the same point within 0.125
inch. Special torque teeter hinge bolt per Section 20-33. Recheck track. Repeat step
until blades are tracked.
6. Install palnut, standard torque per Section 20-32, and torque stripe per Figure 5-1.
Remove tracking aid.
7. Teeter tail rotor back and forth. Verify teeter hinge bolt, bearing metal spacers, washers,
and nuts remain stationary when tail rotor is teetered.
8. Install C119-2 bumper, A141-14 washer, and nut. Standard torque nut per Section 20-
32 and torque stripe per Figure 5-1.
9. Dynamically balance tail rotor per Section 18-20.
25 OCT 2010 R66 Maintenance Manual Chapter 64 Tail Rotor Page 64.3
To Next Page
Loading...