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Operating Procedure
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TM-11-5815-206-12 Teletypewriter Sets AN/PGC-1 AND AN/PGC-3 and Teletypewriters TT-4A/TG TT-4B/TG TT-4C/TG TT-335/TG TT-537/G TT-698/TG Manual
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Operator/Crew Preventive Maintenance Checks and Services
TM 11-5815-206-12/TO 31W4-2PGC1 -61
CHAPTER 4
MAINTENANCE INSTRUCTIONS
4-1. Scope of Operator's Maintenance
sary B PMCS to be sure the item meets the readi-
ness reporting criteria.
The maintenance duties assigned to the operator of
Teletypewriter Set AN/PGC-1 and AN/PGC-3 and
(4) Use the ITEM NO. column in the PMCS
Teletypewriters
TT-4(*)/TG,  TT-335/TG,  TT-
table to get the number to be used in the TM
5 3 7 / G , and TT-698(*)/TG and TT-722(*)/TG are
ITEM NO. column on DA Form 2404 (Equip-
listed below together with a reference to the para-
m e n t  Inspection  a n d Maintenance Worksheet)
graphs covering the specific maintenance function.
when you fill out the form.
The duties assigned do not require tools or test
b. Organizational
preventive
maintenance
equipment other than those issued with the set.
procedures are designed to help maintain equip-
a. Preventive maintenance (para 4-3).
m e n t in serviceable condition.
T h e y include
b. Replacement of defective fuses (para 4-9b).
i t e m s to be checked and how to check them.
c. Cleaning (para 4-3c).
These checks and services, described in paragraph
d. Troubleshooting (para 4-10).
4-6, outline inspections that are to be made at
e. Installing or replenishing paper (para 3-5).
specific weekly (W) intervals.
f. I n s t a l l i n g  o r  c h a n g i n g  i n k i n g  r i b b o n
c. Routine checks like CLEANING, PRESER-
V A T I O N ,  D U S T I N G ,  WA S HI N G, C H EC KI N G
g. Replacing defective copy lamps (para 4 - 9 a ) .
FOR FRAYED CABLES, STOWING ITEMS NOT
4-2. Tools, Material and Test Equipment Required
IN USE, COVERING UNUSED RECEPTACLES,
for Maintenance
C H E C K I N G FOR LOOSE NUTS AND BOLTS,
AND CHECKING FOR COMPLETENESS are not
a. Trichlorotrifluoroethane, NSN 6850-00-105-
listed as PMCS checks.  They are things that you
3084.
should do any time you see they must be done. If
b. Cleaning cloth, lint free, NSN 8305-00-267-
you find a routine check like one of those listed
3015.
in your PMCS, it is because other operators re-
c. No. 000 sandpaper, NSN 5350-00-264-3485.
ported problems with this item.
4-3. Preventive Maintenance
NOTE
NOTE
Refer to TM 750-244-2 for proper proce-
When you are doing any PMCS or routine
d u r e s for destruction of this equipment
c h e c k s , keep in mind the warnings and
to prevent enemy use.
cautions.
a. Operator/crew  preventive  m a i n t e n a n c e is
WARNINGS
the systematic care, servicing and inspection of
Never operate the generator or shelter
equipment to prevent the occurrence of trouble,
until it has been properly grounded. Elec-
to reduce downtime, and to maintain equipment
trical defects in the load lines or equipment
in serviceable condition.  T o be sure that your
c a n cause death by electrocution when
equipment is always ready for your mission, you
contact is made with an ungrounded
must do scheduled preventive maintenance checks
system.
and services (PMCS).
Adequate ventilation should be provided
( 1 ) BEFORE OPERATION, perform your B
w h i l e using  T R I C H L O R O T R I F L U O R O -
PMCS to be sure that your equipment is ready to
E T H A N E . Prolonged breathing of vapor
go.
should be avoided. The solvent should not
(2) DURING OPERATION, perform your D
be used near heat or open flame; the pro-
PMCS. This should help you to spot small troubles
ducts of decomposition are toxic and irri-
before they become big problems.
t a t i n g .  Since  TRICHLOROTRIFLUORO-
ETHANE dissolves natural oils, prolonged
(3) When an item of equipment is reinstalled
contact with skin should be avoided. When
after removal, for any reason, perform the neces-
4-1
Change 2

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