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 TM 9-1220-220-34
2-2.
PERFORMANCE TEST (CONT)
FRAME 5
Step
Procedure
Symptom
Maintenance Action
1.
Set circuit breaker switch (1)
...
...
to OFF.
2.
Put two pieces of black
...
...
thread (2) over gun tube (3)
(outside of tank at notches) to
form crosshairs. Use tape
or strap (4) to hold thread (2)
in place (TM 10). (Thread
must be tight).
3.
Using range finder (5), find
...
...
a target about 1200 meters
away.
WARNING
Do not set circuit breaker
switch (1) to ON until all
personnel and equipment are
out of the way of gun
movement.
4.
Set circuit breaker switch (1)
...
...
to ON.
5.
Using right side of binocu-
...
...
lars, look through firing
pin hole (6) in breech block
(7). (TM 10)
6.
Look through eyepiece (8)
Boresight and
Set circuit breaker switch to
of gunner's periscope (9).
synchronization error.
OFF.
Check that gunner's
a. Level gun to within plus .5
periscope (9) is boresighted
minus 1.5 mils and adjust
(aimed at same target as
rangefinder link connector
rangefinder (1)).
assembly (Vol II, para 4-5,
frame 6).
b. Place correct number of
turns on input shaft (Vol II,
4-5, frame 9).
GO TO FRAME 6
Para 2-2 Vol I
2-10
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