CHAPTER 3. OPERATOR/CREW MAINTENANCE

TM 11-5985-355-13

CHAPTER 3

OPERATOR/CREW MAINTENANCE

WARNING

Dangerous rf voltages exist at AS-2731/GRC elements and connectors. Personnel

should be familiar with the requirements of TB SIG-291 before attempting

maintenance.

3-1. Scope of Operator's Maintenance

3-4. Preventive Maintenance Checks and

Following is a list of maintenance duties normally

Services Periods

performed by the AS-2731/GRC operator.

These

Preventive maintenance checks and services (PMCS) of

procedures do not require special tools or test

the AS-2731/GRC are required on a aily basis. Table 3-

equipment.

1 specifies checks and services that must be

a. Preventive maintenance checks and services

accomplished under the conditions listed below.

chart (table 3-1).

a. Before You Operate. Perform the before (B)

b. Cleaning (table 3-1).

procedures before using the equipment. This will be

3-2. Materials Required

done if you are operating/using the equipment for the

a. Cleaning fluid: Trichlorotrifluoroethane (item 1,

first time, or if your are the assigned operator and have

appx E).

not operated/used the equipment since the last weekly

b. Cleaning cloth.

(W) PMCS.

b. After You? Operate. Be sure to perform A

3-3. Operator's/Crew Preventive Maintenance

(after) PMCS procedures.

Preventive maintenance is the systematic care,

c. During Operation. Observe the performance of

servicing, and inspection of equipment to prevent the

the equipment during (D) operation.

occurrence of trouble, reduce downtime, and assure

d. 4Weekly Procedure. If the equipment is not

that the equipment is operational.

used during the week, perform the B, D, an(W) PMCS

a. Systematic Care. The procedures given in

together with the weekly (W) PSMCS.

table 3-1 cover routine, systematic care and cleaning

If Your Equipment Fails to Operate.

essential to proper upkeep and operation of the

Troubleshoot the radio system, as outlined in the

equipment.

applicable technical manual for the radio system (app A).

b. Preventive Maintenance Checks and Services.

If you are unable to clear the trouble, report the failure

The preventive maintenance checks and services chart

using the proper form (TM 38-750).

(table 3-1) outlines functions to be performed daily.

These checks and services are to maintain Army

NOTES

electronic equipment in a combat-serviceable condition;

1. Routine checks are not listed as

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

PMCS; such as: cleaning (para -.-5),

operating condition. To assist operators in maintaining

dusting, washing; checking for frayed

combat serviceability, th4 chart indicates when to check,

cables; stowing items not in use; cover-

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

ing unused receptacles; checking for

"For

readiness

reporting,

equipment

not

loose nuts and bolts. These are things

ready/available if: column lists the criteria when the AS-

that should be done anytime you see

2731/GRC is classified as not ready for its primary

they must be done.

2. The Item No. in table 3-1 shall be

mission. If the defect cannot be remedied by the

operator, higher category maintenance or repair is

used as a source of item numbers for the

required. Records and reports of these checks and

TM number column on DA Form 2404

services must be made in accordance with the

requirements set forth in TM 38-750.

Change 2 3-1