Section VIII. MISCELLANEOUS ITEMS

TM 750-245-4

3-28. Inspection

3-27. Test

Batteries shall be of the correct voltage and current.

A test should be performed in accordance with

The case shall not be cracked, leaking, or otherwise

damaged. Terminals shall not be corroded or loose.

applicable TM's. Batteries must be under load when

Batteries must be shipped dry with a tag for activation.

testing. Do not test thermal batteries.

Section VIII. MISCELLANEOUS ITEMS

3-29. General

j. Assure that tube shields are the heat dissipating

This section covers inspection of miscellaneous items

type where applicable.

not covered by other sections of this chapter.

3-32. Switches and Controls

Inspect all switches and controls for the following:

3-30. Electrical Motors

a. Selector switch operation should be correct at

Inspect all motors for the following:

all positions.

a. The armature shaft should be straight and not

b. Switches should be securely installed

undersized.

c. Knobs or levers should be securely attached to

b. The armature lamination and iron stakes should

shafts.

not be loose.

d. Seating should be positive in all detent

c. Shaft splines should be free of cracks and

positions.

splinting and firmly installed.

e. Terminal connections should be properly

d. Conductors should have no cuts, cracks,

soldered or secured with terminal screws.

abraded areas, fraying, corrosion, or evidence of

f. Contacts should not be dirty, burned, pitted,

overheating.

welded, carbonized, or have contact resistance.

e. Winding should be suitably impregnated with

g. Micro-switch actuators should not bind.

varnish unless otherwise specified and there shall be no

h. Push switches should depress easily and return

flowing, cracking, or burnt odors.

to original position when released.

f. There should be no evidence of motor running

i. Push-pull switch (interlock) plungers should

hot or overheating.

depress easily and return to original position when

g. Brushes securely installed and not broken,

released.

cracked, or chipped, or worn beyond useable limits.

j. Plunger should pull out and remain but return

h. Motor should operate without excessive noise

easily to original position when depressed.

and vibration.

k. Insulators, wafers, and separators should not be

i. If shock mounted, the mounts should be

dirty, chipped, cracked, or broken.

serviceable.

I. Knob pointer should aline with position index.

m. Switch should turn easily to all positions.

3-31. Electronic Tubes

n. Check that thermostatic switch operates

Inspect all tube assemblies for the following:

properly and cycles at specified temperature per

a. Radioactive electron tubes should be handled in

respective drawing.

o. Toggle switch boot should not be cracked,

b. Envelopes should not be cracked, broken, or

torn, ripped, or rotted.

loose in base.

p. Toggle switch should be mounted in proper

c. Pins should not be corroded, bent, or broken.

position.

d. Tubes must be of the correct type, securely

q. Momentary contact switches should return to the

seated, and firmly clamped in sockets.

original position when released.

e. Cathode ray tubes should have no burn spots,

or clusters of small burn spots greater than 1/4 inch in

3-33. Transformers

diameter where normal presentation is obscured.

Inspect all transformers for the following:

f. Keys should not be broken.

a. Transformers should be securely installed.

g. Tube clips should not be loose, cracked,

b. There should be no indications of overheating.

chipped, or broken.

c. Windings should not be rough, loose, or broken.

h. Tube sockets should not be cracked, chipped,

broken, loose, or have any broken terminals.

d. Brushes (variable transformers) should be

securely installed and not broken, cracked, chipped, or

i. Tube shields, clamps, retainers should not be

excessively worn.

bent, broken, loose, or missing.

3-19