TM 9-1240-400-34&P
Table 5-2. DIRECT SUPPORT TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
b.
Check for worn worm shaft assembly. Refer to page 5-29.
Replace worm shaft assembly. Refer to page 5-29.
4. CROSS-LEVEL CONTROL (2) REQUIRES TORQUE IN EXCESS OF 11.00 IN.-LB (1.24 N-m) TO ROTATE.
a.
Check V-bearing tightness.
Adjust torque. Refer to page 5-29.
b.
Check for worn worm shaft and/or bearings.
Replace worm shaft and/or bearings. Refer to page 5-29.
LEVEL ASSEMBLY
5.
CROSS-LEVEL BUBBLE (3) OR ELEVATION LEVEL BUBBLE (4) DOES NOT CENTER WITHIN 1
GRADUATION.
Observe visually.
Adjust level vials (3 and 4). Refer to page 5-25.
6.
NO ILLUMINATION IN LEVEL VIALS (3 AND 4).
Observe visually.
a.
Replace burned out LEDs. Refer to page 5-25.
b.
Replace defective variable resistor. Refer to page 5-25.
c.
Clean or replace defective lens caps. Refer to page 5-25.
COVER ASSEMBLY
7.
NO ILLUMINATION IN COUNTERS (5).
Observe visually.
a.
Replace burned out electronic component. Refer to page 5-20.
b. Replace defective variable resistor. Refer to page 5-20.
5-7
