TM 9-1240-401-34&P
3-9. DIRECT SUPPORT TROUBLESHOOTING - continued
MALFUNCTION
LOCATION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
EYEPIECE ARM (2) DOES NOT MOVE EASILY OR
REMAIN IN LOCKED POSITION.
Move eyepiece arm (2) from stop to stop.
b. Replace bellows assembly (ref. para
3.
KNOBS (3) ON WORMSHAFT ASSEMBLY BIND.
Rotate knobs (3) on wormshaft assembly.
4.
RETICLE (4) OR LEVEL VIAL (5) ARE NOT lLLUMl-
NATED.
Turn variable resistor knob (6).
a.
Replace incandescent lamp for Ml 18A2
b.
Replace circuit board assembly for
c.
5.
LEVEL (5) HAS NO BUBBLE.
Observe visually.
Repair level assembly, M118A2 (ref.
Repair level assembly, M118A3 (ref.
6,
PRESENT.
Observe visually.
Purge and charge M118A2/M118A3 elbow
telescope (TM 750-116).