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 TM 9-1220-220-34
2-2.
PERFORMANCE TEST (CONT)
FRAME 6
Step
Procedure
Symptom
Maintenance Action
1.
Set circuit breaker switch
(1) to ON.
2.
Using right side of binocu-
lars, look through firing
pin hole (6) in breech block
(7). (TM 10)
3.
Look through eyepiece (8)
Boresight and
Set circuit breaker switch
of gunner's periscope (9).
Synchronization error.
to OFF.
Check that gunner's peri-
scope (9) is boresighted
a. Level gun to within plus
(aimed at same target as
.5 minus 1.5 mils and ad-
rangefinder (1)).
just rangefinder link con-
nector assembly (Vol II,
b. Place correct number
of turns on input shaft (Vol
para 4-5, frame 9).
4.
While looking into eyepiece
(5) of rangefinder (1), ele-
vate or depress the gun and
traverse the turret to find
a target 600 meters away
(TM 20-2)
GO TO FRAME 7
2-12
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