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Page Title:
Table 1. Troubleshooting Procedures. |
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 TM 9-1240-375-34&P
0021 00
HOUSING ASSEMBLY
Table 1. Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1
1 fc 0 3 6
If worn or defective, replace worm
1. ELEVATION CONTROL IS
1. Check for worn or defective
shaft assembly (WP 0070 00).
ERRATIC AND ROUGH
worm shaft assembly.
DURING MOVEMENT.
If worn or defective, replace gear
2. Check for worn or defective
sector (WP 0070 00).
gears in gear sector.
Replace V-bearing or plain
2. ELEVATION KNOB (1)
1. Check for loose or worn
bearing (WP 0070 00).
EXCEEDS 1.5-MIL
V-bearing or plain bearing.
BACKLASH.
If worn or defective, replace
2. Check for worn or defective
worm shaft assembly (WP 0070
worm shaft assembly.
3. ELEVATION KNOB (1)
Loosen plug, and adjust torque
1. Check V-bearing tightness.
REQUIRES TORQUE IN
EXCESS OF 12.00 IN.-LB
Replace worm shaft assembly,
(1.36 N-M) TO ROTATE.
2. Check for defective worm
plain bearing, or V-bearing
shaft assembly, plain bearing,
or V-bearing.
END OF WORK PACKAGE
0021 00-2
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