Section V. TAPE CARTRIDGE MAINTENANCE

11-5835-243-34/EE641-AA-MMI-010/E154

MTT/TO

31S3-4-110-1

(2) Remove four screws securing rear cap to

out from stator. If armature is accidently

motor assembly housing.

removed from stator, entire motor

assembly must be replaced.

CAUTION

Hold down shaft which is located in

(3) Hold down capstan and carefully remove

center of cap when removed rear housing

front cap. Remove bearing from cap.

cap of motor assembly. This will prevent

WARNING

armature from being pulled out of stator.

Use isopropyl alcohol in a well-ventilated

If armature is accidently removed from

area. Avoid prolonged inhalation of

stator, entire motor must be replaced.

fumes. Keep alcohol and fumes away

(3) Hold down shaft (located in center of rear

from flame or sparks.

cap) and carefully remove cap. Remove bearing from

(4) Clean inside of front cap with lint-free cloth

cap.

moistened with i s o p r o p y l alcohol (NSN

(4) Remove two screws securing brush

6810-00-753-4993).

assembly to motor housing and carefully move

(5) Remove two screws securing brush

brush assembly away from housing.

assembly to motor housing and carefully lift out

(5) Clean inside of rear plate with lint-free cloth

brush assembly.

moistened with isopropyl alcohol (NSN-6810-

WARNING

00-753-4993).

Use isopropyl alcohol in well-ventilated

WARNING

area. Avoid prolonged skin contact and

Use isopropyl alcohol in a well-ventilated

inhalation of fumes. Keep alcohol and

area. Avoid prolonged skin contact and

fumes away from flame or sparks.

inhalation of fumes. Keep alcohol and

WARNING

fumes away from flames or sparks.

Do not use compressed air for cleaning

WARNING

purposes except where reduced to less

Do not use compressed air for cleaning

than 29 pounds per square inch (psi) and

purposes except where reduced to less

then only with effective chip guarding

than 29 pounds per square inch (psi) and

and personnel protective equipment. Do

then only with effective chip guarding

not use compressed air to dry parts when

and personnel protective equipment. Do

TRICHLOROTRIFLUOROETHANE

not use compressed air to dry parts when

has been used. Compressed air is

TRICHLOROTRIFLUOROETHANE

dangerous and can cause serious bodily

has been used. Compressed air is

harm if protective means or methods are

dangerous and can cause serious bodily

not observed to prevent chip or particle

harm if protective means or methods are

(or whatever size) from being blown into

not observed to prevent chip or particle

the eyes or unbroken skin of the operation

(of whatever size) from being blown into

or other personnel.

the eyes or unbroken skin of the operator

(6) Clean commutator segments using a soft-

or other personnel.

bristle brush moistened with isopropyl alcohol

(6) Clean commutator segments using a soft-

(NSN 6810-00-753-4993). Dry commutator by

bristle brush moistened with isopropyl alcohol

using moistur-free compressed air. Wipe com-

(NSN-6810-753-4993). Dry commutator by using

mutator segments with clean lint-free cloth to

moisture-free compressed air. Wipe commutator

remove isopropyl alcohol residue.

segments with a clean lint-free cloth to remove

(7) Replace brush assembly in housing and

isopropyl alcohol residue.

secure with two screws.

(7) Replace brush assembly in housing and

(8) Replace bearing and front cap and secure

secure with two screws.

with five screws.

(8) Replace bearing and rear cap and secure

b. Tachometer Commutator.

with four screws.

(1) Remove capstan motor (para 3-29a).

Section V. TAPE CARTRIDGE MAINTENANCE

3-36. Disassembly of Tape Cartridge

(fig. 3-11)

3-26