Adjusting Procedures - AT&T Bell System Plant Series Adjustment Procedure

(A)
(A)
Fig. 19A Fig, 19B
Fig. 19 - Contact Sequence
(b) Keys With Offset Levers: When the
lever is restored unrestrained from
the normal or way-down position to the
intermediate position, no normally closed
contacts of the opposite side shall break
and no normally open contacts of the op-
posite side shall make.
2.23 Lever Release: Fig. 18(A)
(a) Keys Eguipped With a Straight Lever:
Unless otherwise specified, the pres-
sure required to restore the lever from
the locked position shall be:
Test - Min 50 grams
ReadJust - Min 55 grams
Use the No. 68B gauge.
(b) Keys Equipped With an Offset Lever:
The pressure required to restore the
lever from the normal to the intermediate
position shall be:
Test - Min 100 grams
ReadJust - Min 110 grams
Use the No. 79C gauge.
(c) Keys Eguipped With an Offset Lever:
The pressure required to restore the
lever from the way-down position to the
intermediate position shall be:
Test - Min 50 grams
Readjust - Min 55 grams
Use the No. 68B gauge.
(d) In checking these requirements, the
pressure shall be applied at the top
portion of the handle and as near per-
pendicularly to it as possible. The lever
shall return unaided from the locked
position before the lever has travelled
a maximum of 15 degrees.
ISS 5-D, SECTION 032-709-701
Fig. 20 - Key Equipped With
Offset Lever
3. ADJUSTING PROCEDURES
3.001 List or Tools, Gaup;es, and Materials
Code or
Spec No.
~
429A
429B
483A
485A
KS-2663
KS-2993
KS-6320
KS-6854
KS-7782
Gauges
62B
68B
74D
79C
Materials
KS-14666 (or
replaced
D-98063) or
KS-2423
KS-7860
Description
Key Support
Key Support
Adjuster
Smooth-jaw Pliers
5-3/8-in. Jewelers File
Flat Brush
Orange Stick
3-1/2-in. Screwdriver
Parallel-jaw Pliers
3-in. Cabinet Screwdriver
Starrett Pocket Screwdriver
No. 559A
0-700 Gram Gauge
70-0-70 Gram Gauge
Thickness Gauge Nest
0-200 Gram Push-pull Tension
Gauge
Cloth
Petroleum Spirits
Page 9