Chapter 4. OPERATOR AND ORGANIZATIONAL MAINTENANCE

TM 11-6625-847-12

CHAPTER 4

OPERATOR AND ORGANIZATIONAL MAINTENANCE

Section I. OPERATOR'S MAINTENANCE

intervals. These checks and services are to maintain

4-1.

Scope of Operator's Maintenance

Army electronic equipment in combat-serviceable

The maintenance duties assigned to the operator of the

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

SM-442A/GRC are listed below, together with a

and in good operating condition. To assist operators in

reference to the paragraphs which cover the specific

maintaining combat serviceability, the chart indicates

maintenance function.

what to check, how to check, and the normal conditions;

a. Operators daily preventive maintenance checks

the references column lists the paragraphs that contain

and services chart (para 4-4).

detailed repair or replacement procedures. Where no

b. Cleaning (para 4-5).

entry exists in the reference column, the defect cannot

be remedied by the operator; therefore, higher category

4-2.

Materials Required

of maintenance or repair is required. Records and

a. Cleaning Compound (Federal stock No. 7930-

reports of these checks and services must be made in

395-9542).

accordance with the requirements set forth in TM 38-

b. Cleaning cloth (lint-free).

750.

c. Fine sandpaper.

c. Preventive Maintenance Checks and Services

Periods. Preventive maintenance checks and services

4-3.

Operator's Preventive Maintenance

of the SM-442A/GRC are required daily. Paragraph 4-4

Operator's preventive maintenance is the systematic

specifies checks and services that must be

care, servicing, and inspection of equipment to prevent

accomplished daily and under the special conditions

the occurrence of trouble, reduce downtime, and assure

listed in (1), (2), and (3) below:

that the equipment is serviceable.

(1) When the equipment is initially installed.

a. Systematic Care. The procedures given in

(2) When the equipment is reinstalled after

paragraphs 4-4 and 4-5 cover routine systematic care

removal for any reason.

and cleaning essential for proper equipment operation

(3) At least once each week if the equipment

and maintenance.

is maintained in a standby condition.

b. Preventive Maintenance Checks and Services.

The preventive maintenance checks and services chart

(para 4-4) outlines functions to be performed at specific

4-4.

Operator' Daily Preventive Maintenance Checks and Services Chart

Sequence

Item to be

No.

Inspected

Procedures

References

Exterior surfaces -----------------

Clean exterior surfaces of units which comprise SM-

Para 4-5.

442A/GRC.

Intercabling and connectors

Check all interconnecting cables and connectors for

Fig. 1-1.

cracks and breaks. Replace cables that have cracks

or broken connectors.

4-1