Bell System Practices Plant Series Adjustments page 123

4. 02
Selec tor Mech anism
-�
SELECTOR ARMATURE
FOR REQUIREME NTS
AND (2) SEE PAR.
(I)
(BOTTOM VIEW)
UNDER BASIC UNITS
2.01
MOUNTING SCREWS
REQU IREMENT (ARMATURE BACKSTOP ALIGNMENT)
CLEARANCE BETWEEN SIDES OF BACKSTOP
AND SIDES OF ARMATURE EXTENSION.
MIN. INCH
0.010
TO ADJUST
POSITION ARMATURE SPRING ADJUSTING NUT TO HOLD
I.
ARMATURE FIRMLY AGAINST PIVOT EDGE OF CA STING.
2. POSITION ARMATURE AND BACKSTOP WITH
MOUNTING SCREWS LOOSENED.
ISS 7, SECTION 573-115-700
Pag e 123