TM 9-1240-401-34&P
4-8. DIRECT SUPPORT SYMPTOM INDEX
Troubleshooting
Procedure
(Page)
MOUNTING SURFACES
Mounting surfaces do not seat Ml 17/M1 17A2 panoramic telescope correctly . . . . . . . . . . . . . . . . . .
CROSS-LEVEL MECHANISM
knob exceeds 0.5 mil backlash . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 7
Cross-level
mechanism
knob is erratic and rough during movement . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 7
Cross-level
mechanism
knob requires torque in excess of 11 pound-inches
Cross-level
mechanism
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
(1.24 N-m)
to rotate . .
LEVEL ASSEMBLY
No illumination in cross-level or pitch level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 7
4-9. DIRECT SUPPORT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
LOCATION
CORRECTIVE ACTION
MOUNTING SURFACES
1. MOUNTING SURFACES (1) DO NOT SEAT
M117/M117A2 PANORAMIC TELESCOPE
CORRECTLY.
Observe visually.
a. Clean mounting surfaces with
cleaning compound (item 3,
appx B).
b. Remove burrs with abrasive
cloth (item 4, appx B) dipped
in cleaning compound
(item 3, appx B).
4-6