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l. Periscope, M44A4 Tank (figs. 3-30 through
3-32). Refer to para 3-10.i. for procedures.
m.
Periscope, M44A1E1 Tank (figs. 3-30
through 3-32). Refer to para 3-10.i. for procedures.
n.
Periscope, M44A2E1 Tank (figs. 3-30
through 3-32). Refer to para 3-10.i. for procedures.
o. Periscope, M47 Tank (fig. 3-33).
NOTE
The periscope body assembly must be separated
from the head assembly or removed from stor-
age for purging and charging procedures. Refer
to appendix A for a listing of applicable publi-
cations.
Figure 3-33 M47 Tank Periscope Body Assembly
(1) Perform purging and charging procedure para
2-5.b.
(2) Purge instrument at 5 psig for 5 minutes.
(3) Charge instrument at 1 psig for 10 seconds.
(4) Leak test for minimum of 5 minutes.
TM 750-116
p. Periscope M48 Tank (fig. 3-34).
ENSURE THAT VEHICLE MASTER
SWITCH IS IN OFF POSITION. THE
HIGH VOLTAGE AND LOW AMPERAGE
OF THE POWER PACK IS NOT DAN-
GEROUS; HOWEVER, IF THE HIGH
VOLTAGE PARTS ARE TAMPERED
WITH, AN ELECTRIC SHOCK CAN RE-
SULT.
Do not purge and charge the infrared body
assembly in bright light; prolonged exposure
may cause damage to the image conversion
tube.
NOTE
The periscope body assembly must be separated
from the head assembly or removed from ve-
hicle storage for purging and charging proce-
dures. Refer to appendix A for a listing of
applicable publications.
Figure 3-34 M48 Periscope Body Assembly
(1) Perform purging and charging procedure para
2-5.b.
(2) Purge instrument at 5 psig for 5 minutes.
(3) Charge instrument at 1 psig for 10 seconds.
(4) Leak test for minimum of 5 minutes,
3-15
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