TM 1-1520-238-23
5-191
5.43.
MAIN ROTOR HEAD ASSEMBLY (AVIM) – continued
WARNING
FLIGHT SAFETY PART
The main rotor head is a flight safety part. Failure to follow maintenance instructions may
result in serious injury or death of crewmembers and/or serious damage to the helicopter.
Main rotor head weighs approximately 675 pounds. Use crane to lift rotor head. Failure to do
so could result in serious injury. If injury occurs, seek medical aid.
5.43.3. Assembly
NOTE
If the main rotor hub was replaced, perform steps a, b, c, and d. If hub was removed, go to step e.
a. Install main rotor droop stop ring (para 5.44).
b. Install main rotor upper seal retainer and plain encased seal (para 5.45).
c. Install main rotor lower seal and oil seal retainer (para 5.46).
d. Install main rotor electrical brush, brush holder, and pitch web electrical lead (para 5.48).
GO TO NEXT PAGE
