Table 4-1. Organizational Preventive Maintenance Checks and Services

TM 5-6625-2691-13&P

Table 4-1. Organizational Preventive Maintenance Checks

and Services

Q Quarterly

Total man-hours required: 1.6

Work

Item to be inspected

time

procedure

(M/H)

0.2

CONNECTIONS

Inspect for damaged wires, insulation, loose connections and insecure mountings. Replace damaged

wires and insulation. Tighten loose connections and secure all mountings.

0.3

TERMINALS

Inspect for loose, corroded or oxidized terminals. Inspect for cracks, breaks, or other damage.

WARNING

Dry cleaning solvent, P-D-680 or P-S-661, used to clean parts is

potentially dangerous to personnel and property. Avoid re-

peated and prolonged skin contact. Do not use near open flame

or excessive heat. Flash point of solvent is 100 F. (38 C) - 138 F.

(60 C.).

Clean all parts when unit is disconnected from the power source with cleaning solvent P-D-680 and

dry thoroughly. Replace parts as required.

0.1

ELECTRICAL COMPONENTS

Blow dust off using compressed filtered air.

0.1

FAN MOTOR

Inspect for overheating, excessive hum, or loose mounting. Tighten loose mounting and report any

other damage to higher level maintenance.

0.7

SWITCHES

Check for proper operation (para 4-24) and secure mountings. Replace a defective toggle switch

(pars 424) and refer a defective wind switch to direct support maintenance for replacement action.

0.2

GENERAL

Clean away dirt, oil film, rust or any other foreign material from the unit. Repaint bare metal sur-

faces. Do not paint electrical components.

Section V. TROUBLESHOOTING

4-12. General

equipment. Each malfunction for an individual compo-

This section contains information useful to organiza-

nent, unit, or system is followed by a list of tests or in-

tional maintenance personnel in diagnosing and cor-

spections which will help you to determine probable

recting an unsatisfactory condition that may exist in

the equipment.

causes and corrective actions to take. You should per-

4-13. Troubleshooting

form the tests and/or inspections in the order listed.

Table 4-2 lists malfunctions which may occur in this

Table 4-2. Troubleshooting

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

NOTE

Before you use this table, be sure you have performed all normal operational checks. If you have a malfunction which is not listed

in this table, notify the next higher level of maintenance.

1. TEST SET FAILS TO START

Inspect for a defective fuse by removing the three holder caps. Turn the caps counterclockwise and pull the fuses out. Inspect the fuses

for burns, cracks or breaks. Test the fuses for continuity using a multimeter (para 7-2).

Replace a defective fuse with a fuse of the same rating and size. Replace fuse holder cap by screwing full

clockwise until snug. Do not overtighten.

2. LOAD SWITCHES ARE ON BUT NO LOAD IS APPLIED

Inspect the test sat for a faulty lead.

Replace any faulty leads.

4-3