ARMY TM 9-1290-262-24&P
MARINE CORPS TM 00476C-24&P
AIR FORCE TO 49A7-3-72/74
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 6. Check for setscrews that are set too tight against worm ball cap or socket.
Adjust setscrews against worm shaft cap or ball socket seat. Refer
to page 3-12.
Step 7. Recheck for backlash.
If backlash is still present, notify general support maintenance.
7. ELEVATION MECHANISM BINDS.
Step 1. Check for backlash.
Adjust elevation mechanism to remove backlash. Refer to
Step 2. Check for bent worm shaft.
Replace worm shaft. Refer to page 3-12.
Step 3. Check worm shaft ball for out-of-roundness.
If worm shaft ball is out of round, replace worm shaft. Refer to page
Step 4. Check for worn or damaged worm shaft.
Replace worm shaft. Refer to page 3-12.
Step 5. Recheck for binding.
If binding is still present, notify general support maintenance.
