SPHERICAL BALL/SPHERICAL BALL BEARING AXIAL PLAY CHECK
Keep the control stick (1) and directional control
pedals (2) at neutral position.
Press the thrust control brake trigger (3). Lower
the thrust control (4) to mid-travel position.
With the swashplate stationary inner ring (5)
at mid-travel position, measure the height (Y)
of the exposed spherical ball (6) below the
swashplate stationary inner ring (5) at two places
180º apart. Use cardboard. Record height.
If the spherical ball (6) moves down after the
swashplate movement has stopped, support the
ball in its uppermost position before making the
Subtract Y in step 6 from X in step 3 to determine
axial play. If the dimension indicates that axial
play is more than 1/8 inch, replace the dry-type
bearings (Task 5-122).
If the axial play is greater than 0.050 inch,
following replacement of the bearing, check for
correct bearing installation (Task 5-125).
If the bearings are installed correctly, check the
swashplate for excessively worn spherical ball
bearing ring (Task 5-123.1).