TM 55-1520-240-23-4
5-97.1
INSPECT PITCH LINK WITH TEFLON BEARINGS ON HELICOPTER
(Continued)
5-97.1
4.
To check upper bearing wear, clamp dial indicator
(12) at upper end of pitch link (13) as shown.
5.
Have helpers support and twist rotary-wing blade
(1) to raise pitch arm (14). Note dial indication.
Have helpers twist blade to lower pitch arm. Note
dial indication. Difference is total looseness.
6.
Repeat step 5 two more times. Add total of three
indications. Divide by 3.
7.
Repeat steps 4, 5, and 6 for lower bearing (5).
Remove dial indicator (12).
8.
If dial indicator average in step 6 or 7 is more
than 0.010 inch, go to step 9. If dial indicator
(12) shows 0.010 inch or less, go to Follow-On
Maintenance.
5-588
