Chapter 4. MAINTENANCE INSTRUCTIONS

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-

(para 3-6).

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

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