CHAPTER 4. OPERATOR AND ORGANIZATIONAL MAINTENANCE

TM 11-5820-509-12

CHAPTER 4

OPERATOR AND ORGANIZATIONAL MAINTENANCE

Section I. OPERATOR'S MAINTENANCE

services chart (para 4-5) outlines functions to be

4-1. Scope of Operator's Maintenance

performed daily. These checks and services are to

The maintenance duties assigned to the operator of Radio

maintain Army electronic equipment in serviceable

Set AN/PRC-47 are listed below, together with a reference

condition; that is, in good general (physical condition)

to the paragraphs covering the specific maintenance

and in good operating condition. To assist operators in

functions.

maintaining serviceability, the chart indicates what to

a. Daily preventive maintenance checks and services

check, how to check, and the normal conditions. The

{para 4-5)

Paragraph references column lists the paragraphs that

b. Cleaning (para 4-6).

contain detailed repair or replacement procedures. If the

defect cannot be remedied by performing the corrective

4-2. Materials Required

actions indicated, a higher category of maintenance or

a. Trichloroethane.

repair is required. Records and reports of these checks

b. Cleaning cloth.

and services must be made in accordance with the

c. Cleaning brush.

requirements set forth in TM 38-750.

4-3. Operator's Preventive Maintenance

4-4. Operator's Preventive Maintenance

Preventive maintenance is the systematic care, servicing,

Checks and Services Periods

and inspection of equipment to prevent the occurrence of

trouble, to reduce downtime, and to assume that the

Preventive maintenance checks and services of the

equipment is serviceable.

equipment are required daily or at least once each week if

Systematic Care.

The procedures given in

the equipment is maintained in a standby condition.

paragraph 4-4, 4-5, and 4-6 cover routine systematic care

Paragraph 4-5 specifies the items to be checked and

and cleaning essential to proper upkeep and operation of

serviced.

the equipment.

b. Preventive Maintenance Checks and Services. The

preventive maintenance checks and

4-5. Daily Preventive Maintenance Checks and Services Chart

Sequence

Item to be inspected

Procedure

Paragraph

No.

references

1.................. Radio set exterior

Inspect for cleanliness.......................................................................................... Para 4-6.

2.................. Electronic components

Inspect for overheating ........................................................................................ Higher maintenance

category required.

3.................. Terminalsandreceptacles.

Make sure all cables and connectors are firmly installed.

None.

4.................. Mounting screws

Inspect for tightness ............................................................................................. None.

5.................. Cables (and battery, if

Check for cracks, breaks, and torn insulation .................................................... None.

used).

exposure of the fumes to an open flame

4-6. Cleaning

converts the fumes to highly toxic,

Inspect the exterior of the equipment. The exterior

dangerous gases.

surfaces should be free of dust, dirt, grease, and fungus.

b. Remove grease, fungus, and ground-in dirt from the

a. Remove dust and loose dirt with a clean, soft, lint-

case; use a cloth dampened (not wet) with trichloroethane.

free cloth.

After cleaning, wipe dry with a cloth.

WARNING

CAUTION

The fumes of trichloroethane are toxic.

Do not press on the face of the meter

Provide thorough ventilation whenever

(glass) when cleaning; the meter may be

used. DO NOT use near an open name.

damaged.

Trichloroethane is not flammable, but

4-1