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 39 of 590
para 2-11
TM 9-1240-401-34&P
2-9. DIRECT SUPPORT TROUBLESHOOTING
I
MALFUNCTION
TEST OR INSPECTION
LOCATION
CORRECTIVE ACTION
BRACKET ASSEMBLY
1. ELEVATlON BRACKET (1) DOES NOT SLIDE
Rotate elevation knob
(2)
from stop to stop.
Adjust three self-locking nuts
M146 TELESCOPE MOUNT
2. YOKE 3) CANNOT BE ROTATED THROUGH
E
180 D GREES WITHOUT BINDING.
Move yoke from side to side.
a. Remove burrs from mating surfaces.
b. Replace headed grooved pin and
related parts located inside yoke pin
(4)
(ref. para
2-11).
3.
TAPERED PIN (KING PIN)
(5)
BINDS.
Remove tapered pin (king pin) (5) and inspect for
smooth rotation of knob.
a. Remove burrs from tapered pin.
b. Replace worn or damaged parts as
required (ref. para 2-11).
4. ELEVATION KNOB 2 IS ERRATIC AND ROUGH
Rotate elevation knob from stop to stop.
a.
b.
Adjust elevation shoulder screw
(6) (ref. para 2-15).
Replace damaged elevation shoulder
screw parts (ref. para 2-11).
2-5
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