Organizational Quarterly Preventive Maintenance Checks and Services Chart

TM 11-6625-2616-14

4-7. Organizational Quarterly Preventive Maintenance Checks and Services Chart

References

Item

Proceudre

Sequence

No.

Publications . . . . . . . . . . . .

Check to see that all publications are complete, serviceable, DA Pam 310-4.

and current.

Modifications . . . . . . . . . . . Check DA Pam 310-7 to determine if new applicable MWO's TM 38-750 and DA

Pam 310-7.

have been published. All URGENT MWO'S must be ap-

plied immediately. All NORMAL MWO's must be

scheduled.

Spare parts . . . . . . . . . . . . Check all spare parts (operator and organizational) for App B.

general conditions and method of storage. There should

be no evidence of overstock, and all shortages must be on

valid requisition,

(a) Remove the six screws attaching the

4-8. Cleaning

signal conditioning assembly to the chassis (fig.

a. Exterior Cleaning. The exterior surfaces

4-1).

should be clean and free of dust, dirt, and grease,

(b) Place the signal conditioning am-

(1) Remove dust and loose dirt with a clean,

sembly upright in the mounting slots provided

sof cloth.

(fig. 4-1).

(2) Remove dust and dirt from the input

c. Interior Cleaning. The interior of the in-

jacks with a soft brush.

strument should be clear and free of dust and

(3) Remove grease and ground-in dirt from

dirt. Remove "any accumulated dust or dirt with

the case with a soft cloth dampened with a mild

low-pressure clean, dry air. Reassemble the in-

solution of detergent or soap and lukewarm water.

strument in reverse order of disassembly.

CAUTION

4-9. Touchup Painting

Care should be taken in cleaning the

readout window. An adhesive is used

CAUTION

to bond the window to the front panel

Do not use steel wool for rust removal.

and too much pressure may separate

Minute particles of steel wool may enter

the window from the panel.

the chassis of the instrument and cause

(4) Clean the front panel, readout window,

harmful arcing, electrical shorting, or

and pushbuttons with a soft cloth dampened

grounding of circuitry.

with a mind solution of detergent or soap and

Remove rust and corrosion from metal surfaces

lukewarm water.

by lightly sanding them with fine sandpaper.

b. Access to Components. Perform the fol-

Brush two thin coats of paint on the bare metal

lowing steps to gain access to internal compon-

to protect it from further corrosion. Refer to

ents for inspection and cleaning.

the applicable cleaning and refinishing practices

specified in TB 746-10.

(1) Cover removal.

(a) Turn fuse holder cap counterclock-

wise and remove it from the body of the fuse

4-10. General Troubleshooting Information

holder.

Operator and organizational troubleshooting this

(b) Remove the two screws attaching bot-

equipment is based upon the operational check

tom cover to chassis and remove bottom cover.

contained in the daily preventive maintenance

(c) Remove the two screws attaching the

checks and services chart. To troubleshoot the

top cover to chassis and remove top cover.

equipment, perform all functions in the chart

(para 4-4) and proceed through the items until

(2) Shield removal.

an abnormal condition or result is observed.

(a) Remove the four screws attaching the

When an abnormal condition is observed, note

bottom shield and remove shield.

the item number and turn to the corresponding

(b) Remove the four screws attaching the

number in the troubleshooting chart (para 4-11).

top shield and remove top shield.

Perform the checks and corrective actions indi-

(3) Signal conditioning assembly mounting.

cated in the troubleshooting chart. If the cor-