TM
ll-5805-587-l5/3
TO 31W2-l-471-3
Semiannual Preventive Maintenance
Paragraph 4-10.
Checks and Services - Continued
Sequence
References
Procedure
Item
No.
Chap 4,
Check the digit
Selector/selector
3
Sect IV
response, back
control circuits
marking, and
seizure capa-
bilities.
Chap 4,
Perform routine
4
Trunk equipment
Sect VII
tests and check
the signaling
and transmis-
sion character-
istics of all
trunks and
associated
equipment.
Para 2-5b(9)
Check operation
Conference ampli-
s
and readjust,
fiers
if necessary.
Annual Preventive Maintenance Checks and Services
Note:
If the equipment must be
kept in continuous operation,
check and service only those items
that can be checked and serviced
without disturbing operation; make
complete checks and services when
the equipment can be shut down or
during periods of light traffic.
Sequence
Procedure
References
No.
Item
Para 4-171
Motorswitches
Make speed
and
checks and
4-176e
lubricate.
Make random
Sect XIV
checks of re-
lays.
Interrupter motors
Make routine
Para 4-174,
4-176c, and
tests and
lubricate.
4-176d.
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