Bell System Practices Plant Series Adjustments page 13

2.
06 Selector Mechanism (Cont. )
TO FACILITATE MAKING THE FOLLOWING ADJUSTMENTS, REMOVE THE RANGE FINDER ASSEMBLY
AND SELECTOR MAGNET ASSEMBLY.
BETWEEN THE ARMATURE AND THE POLE PIECES TO REMOVE ANY OIL OR FOREIGN MATTER THAT MAY
BE PRESENT. MAKE CERTAIN THAT NO LINT OR PIECES OF PAPER REMAIN BETWEEN THE POLE PIECES
AND THE ARMATURE.
SELECTOR ARMATURE
THESE REQUIREMENTS NEED NOT BE MADE NOR CHECKED
IF THE SELECTOR MAGNET BRACKET AND RECEIVING MAR­
GIN REQUIREMENTS ARE MET.
(1) REQUIREMENT
CLEARANCE
0.025
MIN.
0.045
MAX.
BETWEEN ARMATURE CLAMP STRIP AND
MAGNET BRACKET CASTING.
(2) REQUIREMENT
OUTER EDGE OF ARMATURE SHOULD BE FLUSH WITHIN
WITH OUTER EDGE OF POLE PIECES.
(3) REQUIREMENT
START LEVER SHALL DROP FREELY INTO ARMATURE EXTENSION SLOT.
TO ADJUST
POSITION ARMATURE SPRING ADJUSTING NUT TO HOLD ARMATU�E FIRMLY AGAINST PIVOT
EDGE OF CASTING.
MOU NTIN G SCREW .
POLE PIECE
SELECTOR ARMATURE DOWNS TOP BRACKET
REQUIREMENT
REMOVE OIL SHIELD.
THEIR CAM, AND ARMATURE RESTING AGAINST ITS DOWNSTOP, CLE ARANCE BETWEEN
END OF ARMATURE AND LEFT EDGE OF LEFT POLE PIECE
MIN. 0.025 INCH
TO ADJUST
POSITION DOWNSTOP BRACKET WITH MOUNTING SCREW LOOSENED.
OIL SHIELD AND CHECK Oil SHIELD ADJUSTMENT.
NOTE
TO INSURE BETTER O PERATION, PULL A PIECE OF BOND PAPER
NOTE
INCH
INCH
POSITION ARMATURE WITH MOUNTING SCREWS LOOSENED.
WITH MAGNET DE-ENERGIZED, LOCK LE VERS ON HIGH P ART OF
0.030
MAX. INCH.
ISS 7, SECTION 573-115-700
' I
AR MATURE
MOUNT lNG SCREWS
CLAMP STRIP
0.015
INCH
REPLACE
CAST ING
PIVOT EDGE
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