65-22 Damper Assembly
Refer to R66 Illustrated Parts Catalog (IPC) Figure 65-7.
A. Disassembly
1. Remove tail rotor drive shaft per § 65-20, if not previously accomplished.
2. Refer to Figure 65-4. Remove hardware securing C041-11 bearing assembly and
C041-13 arm to C041-3 link.
B. Inspection and Assembly
1. Refer to Figure 65-4. Inspect condition of components. Verify no wear on Teflon®
(dark gray) face of C041-5 washers. Verify no wear or grooves on A141-36
washers, A141-37 washers, and link. Replace components as required.
CAUTION
Install C041-5 washers with Teflon® face toward C041-3 link and
toward A141-36 washer (remove protective coating, if installed).
CAUTION
Install C041-6 spring washer with concave face toward C041-5
washer.
2. Assemble damper. Install hardware securing C041-11 bearing assembly and
C041-13 arm to C041-3 link. Align component holes on A041-10 dowel pin(s).
Standard torque nuts and palnuts per § 20-32 and torque stripe per Figure 5-1.
3. Attach a calibrated spring scale to Point A. Holding link, verify force required to
rotate arm about Point B is 3.5 - 5.8 lb. Adjust as required per Part C.
4. Attach a calibrated spring scale to Point B. Holding bearing assembly, verify force
required to rotate link about point C is 2.1 - 3.6 lb. Adjust as required per Part C.
C. Friction Adjustment
CAUTION
Do not adjust damper drag by changing bolt torque.
1. Refer to Figure 65-4. If friction is less than required:
a. Disassemble C041-12 damper assembly per Part A. Bend C041-6 spring
washers to 0.065 - 0.078 inch total height; inspect and reassemble damper
assembly per Part B.
b. If friction is less than required after correcting spring washer height, disassemble
damper assembly per Part A. Lap A105-12 journals, as required; inspect and
reassemble damper assembly per Part B.
2. If friction is greater than required:
a. Disassemble damper assembly per Part A. Flatten C041-6 spring washers
slightly; inspect and reassemble damper assembly per Part B.
3. Install tail rotor drive shaft per § 65-20.
MAY 2015 Chapter 65 Tail Rotor Drive System Page 65.7
To Next Page
Loading...