BALL SPHERICAL BEARING FRICTION CHECK
Rotary-wing head removed for clarity.
Check ball spherical bearing (1). Refer to Task
5-123.1 for repair criteria of bearing.
Disconnect three pitch links (2). Have helper
guide pitch links. Do not remove pitch link boots
(3) (Task 5-97).
Pull pitch links (2) up as far as they will go without
damage to boots (3) and covers (4). Tie links
together. Use twine (E433).