AT&T Bell System Plant Adjustment Procedure page 3

(
1.15
The normal (unoperated) position of a
key equipped with a straight lever is that
position in which the lever is perpendicular to
the keytop, and the spring assemblies are unop-
erated.
1.16
The operated position of a key equipped
with a straight lever
is that position in
which the lever is thrown either to the extreme
front or rear, and the spring assemblies involved
are operated.
1 .17
The normal position of a key equipped
with an offset lever
is that position in
which the lever is perpendicular to the keytop,
and the spring assemblies involved are operated.
1.18
The intermediate position of a key
equipped with an offset lever
is that posi-
tion of the lever in which the spring assemblies
involved are unoperated, and the lever can be
moved to either front or rear.
1.19 The way-down position of a key equipped
with an offset lever
is that position in
which the lever is operated to the extreme front
of the key, and the spring assemblies involved
are operated.
1.20
One drop of oil, for the purpose of this
section, is the amount of oil that adheres
to the nozzle of the No. 486A oil can when the
sides of the container are depressed lightly and
released. The drop adhering to the nozzle under
this condition should be approximately twice the
diameter of the nozzle.
1.21
One dip of KS-8496 Lubricating Com-
pound No. 3,
for the purpose of this sec-
tion, is the amount of lubricant retained on the
KS-14164 brush after being dipped into the lubri-
cant the full length of the bristles, and then re-
moved without allowing the bristles to touch the
side of the container.
2. REQUIREMENTS
Plunger-type Keys
*2.01
Cleaning
(a) Contacts shall be cleaned, when necessary,
in accordance with approved procedures.
(b) Other parts shall be cleaned, when neces-
sary, in accordance with approved pro-
cedures.
ISS 5-D, SECTION 032-714-701
2.02 Lubrication
(a) (Applies only
to
keys of the All type used
as master ringing keys after turnover to
the telephone company.) Each plunger rod at
the lower plunger guide shall be adequately
lubricated with KS-8496 lubricating compound
No. 3. When lubrication is necessary, one dip
shall be applied.
(b) Recommended Lubrication Intervals:
After turnover, it is recommended that
the lower plunger guide be lubricated once
every two years.
Slide
Plate
Plunger
Sprin~
-----4'!J
Contact
Spring--•
Mounting
Strip
---+-H--J
.---n.t:Y Top Screw
~--(A)
r---Pin
Plunger
Lock
or Stop
Cone
Slide
:Plate
Operating
Spring
Fig. 1 - A9-type Key
2.03
Plunger Movement: Fig. 1(A) - The
plungers shall work freely in their bear-
ings, and when released unrestrained, shall re-
turn to their normal position with a snap.
Gauge by eye and feel.
*2.04
Slide Plate Operating Spring Tension:
Fig. 1 (B) - The pressure of the slide
plate operating spring against the pin in the
slide plate, with all the plungers in the normal
position, shall be as indicated in the following
table.
Page 3