Bell System Practices Plant Series Adjustments page 10

SECTION
573-115-700
Selector Mechanism (Cont.)
2. 03
BEFORE PROCEEDING WITH THE SELECTOR ARMATURE SPRING ADJUSTMENT
(ONE ANTIFREEZE BUTTON OR TWO ANTIFREEZE BUTTONS) MUST BE KNOWN.
ON, OR THE MISHANDLING OF A TWO BUTTON ARMATURE CAN DAMAGE THE THIN LEAF SPRING
ATTACHED TO THE PIVOT END.
FOLLOWS:
(1)
(2) REMOVE ARMATURE MOUNTING SCREWS.
(3)
REASSEMBLE AND RECHECK THE FOLLOWING ADJUSTMENTS:
SELECTOR AR'v\A TURE
SELECTOR ARMATURE DOWNSTOP BRACKET
SELECTOR MAGNET BRACKET
SELECTOR MAGNET BRACKET -VERTICAL ADJUSTMENT
(3) REQUIREMENT
ATURE IN CONTACT WITH FRONT POLE PIECE
(MAGNET ENERGIZED).
CLEARANCE BETWEEN LOWER SURFACE OF ARM-
ATURE EXTENSION AND UP?cR SURFACE OF
MARKING LOCK LEVER. GAUGE B Y E Y E
SELECTOR
MAGNET
POLE PIECE""""f
Page
10
CAUTION
IF REMOVAL FOR EXAMINATION IS NECESSARY
DISCONNECT ARMATURE SPRING.
WITHDRAW ARMATURE FROM SELECTOR.
THERE SHOULD BE SOME
.
PRY POINT
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TO ADJUST
MAGNET BRACKET
MOUNTING SCREW
CLAMP SCREW
(RIGHT SIDE VIEW)
ARMATURE EXTENSION
MARKING LOCK LEVER
WITH MOUNTING SCREW LOOSENED
POSITION UPPi:R END OF MAGNET
BRACKET BY MEANS OF PRY POINT.
(1)
RECHECK REQUIREMENTS
THE TYPE OF ARMATuRE
I
EXCESSIVE TENSION
DISASSEMBLE AS
1
AND (2).