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 TM
9-1290-232-34&P
TROUBLESHOOTING
SCOPE
Troubleshooting
of
the
M13A1,
M13A1C,
M13A3,
or
M13B1
Elevation
Fire
Control
Quadrant
is
done
b y using the following performance test. If you find any symptom, look in the maintenance action column
to find out what to do to correct it.
P E R F O R M A N C E TEST
TOOLS:
6"
C-clamps
(two)
F i r e control gunner's quadrant M1A1
Bench level
S u r f a c e plate
Angle plate
3/16"
key
A n g l e plate support (item 7, Vol II, App A)
SUPPLIES:
PERSONNEL:
One
U s i n g bench level
REFERENCES:
JPG
41C
for:
C r o s s leveling surface plate
TM 9-1290-200-14&P for using M1A1 gunner's quadrant
EQUIPMENT
CONDITION:
Elevation
fire
control
quadrant
on
work
bench
I-2-1
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