TM 1-1520-238-T-7
11–17
11–2.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (cont)
11–2
(c) The bearing assembly, located between the stationary and rotating swashplate, allows the rotating
swashplate to rotate. The bearing assembly is a double-roll ball bearing assembly with a one-piece outer race and
a three-piece inner race, with flexible and removable upper and lower seals.
(d) The self-aligning spherical and slider bearing (uniball) is located between the stationary and rotating
swashplate. The spherical ball allows the swashplate assembly to tilt for cyclic control movements. The slider
bearing allows the entire swashplate assembly to move up or down the static mast as a unit, for collective control
movements. The upper and lower bearing retainers secure the self-aligning spherical and slider bearing, and the
double-roll ball bearing assembly. The upper bearing retainer mounts to the stationary swashplate. The lower
bearing retainer mounts to the rotating swashplate.
(11) Pitch Link Assemblies.
Four adjustable pitch link assemblies, mounted between the swashplate and
horns on the pitch housings, receive control inputs from the rotating swashplate and transmit the inputs to the
pitch change horns. The pitch link assemblies are adjustable to facilitate main rotor blade tracking procedures.
(12) Scissor Assemblies.
The scissor assemblies, connected to the swashplate and main rotor hub,
consist of a lower arm and and upper arm and drive the rotating swashplate. The scissor assemblies transmit
rotational power to the rotating swashplate, while the load bearing scissor assembly drives the rotating
swashplate.
