TM-9-1240-401-34-P
TELESCOPE MOUNT M146: M118A2 AND M118A3; TELESCOPE MOUNT M145: M145A1; PANORAMIC TELESCOPE: M117 AND M117A2; FIRE CONTROL QUADRANT: M15; PERISCOPE: M42
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
JULY 1993
TM-9-1240-401-34-P - Page 182 of 590
5-8
TM 9-1240-401-34&P
5-9. DIRECT SUPPORT TROUBLESHOOTING - continued
MALFUNCTION
TEST OR INSPECTION
LOCATION
CORRECTIVE ACTION
ELBOW ASSEMBLY
3. LENS (5) IS FOGGED OR CONDENSATION IS
PRESENT.
Observe visually.
Purge and charge telescope
(TM 750-116).
5-10. GENERAL SUPPORT SYMPTOM INDEX
Troubleshooting
Procedure
(Page)
CAP ASSEMBLY
Cap binds or jumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 5-9
COUNTER ASSEMBLY
Azimuth counter and reset counter are not legible . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 5-9
Azimuth counter and reset counter do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 5-9
Differential gear assembly noisy when azimuth knob is operated . . . . . . . . . . . . . . . . . . . . . . . . . .
. 5-9
ELBOW ASSEMBLY
Lens is damaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 5-9
Lens will not focus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 5-9
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