TM 55-1520-240-23-9
11-211
INSPECT FORWARD LCT YOKE
(Continued)
11-211
e.
Put a coat of corrosion-preventive compound
(E153) over the first coat. Use a small brush
with a long handle.
f.
Install the shaft, if removed (Task 11-217).
2.
Prepare the helicopter for yoke inspection.
a.
Connect the battery (Task 1-39).
b.
Apply electrical power.
c.
Appy hydraulic power.
d.
Put the cockpit thrust control fully up (TM
55-1520-240-T).
3.
Mount dial indicator (1) at aft yoke support (2).
Indicator shaft (3) shall be in contact with rear
face of yoke (4).
4.
Try to move yoke (4) axially in support (2).
Record axial movement.
a.
If axial movement is not greater than 0.010
inch, remove dial indicator (1), remove
hydraulic power and go to step 14.
b.
If axial movement is greater than 0.010 inch,
go to step 5. Remove hydraulic power.
5.
Disconnect actuator (5) and connecting link (6)
from yoke (4) (Task 11-212).
6.
Install dial indicator (1) over aft bearing housing
(7) of yoke (4).
7.
Grasp yoke (4) at bearing housing (7). Try to
move yoke up and down. Do not rotate yoke.
Record vertical movement.
11-837
