Bell 28E Adjustments page 38

SECTION 573-127-703
3.05 Code Reading Contacts
Remove code reading contact
Note 1:
assembly from transmitter distributor
unit before making initial adjustments.
Note When using the contact spring
2:
bender, start with the contact pile -up
farthest from the handle of the tool and
work toward the handle so as not to disturb
adjustments already made.
(A) NORMALLY CLOSED CONTACTS­
BACKSTOP
Requirement
Lower contact leaves for all levels
should be parallel with the mounting
plate and in line with one another.
To Adjust
Bend backstop to meet the requirement.
(B) NORMALLY CLOSED CONTACTS­
SPRING
Requirement
(1)
With swinger held away
Min oz---Max
2
to move lower contact leaf from
backstop.
To Adjust
Bend lower leaf.
Requirement
(2)
Min 30 grams---Max
to open normally closed contacts.
To Adjust
Bend swinger.
Note 3: If it is necessary to bend
backstop to obtain required tension,
reposition backstop to meet
NORMALLY CLOSED CONTACTS
- BACKSTOP requirement.
UPPER CONTACT
LEAF
Page 38
6
oz
(C) NORMALLY OPEN CONTACTS- GAP
40 grams
(D) NORMALLY OPEN CONTACTS -
(Front Views)
MOUNTING PLATE
BACKSTOP
SWINGER
I
Requirement
inch---Max
0.010
gap between normally open contacts.
To Adjust
Bend associated backstop to meet
requirement.
SPRING
Requirement
Min grams---Max
30
to move normally open contact away
from backstop.
To Adjust
Bend upper contact leaf.
Note 4: If it is necessary to bend back­
position backstop to meet NORMALLY
OPEN CONTACTS- GAP requirement.
NORMALLY
CLOSED
CONTACTS
LOWER
CONTAC T
LEAF
HELD
AWAY
LOWER
CONTACT
LEAF
NORMALLY
CLOSED
CONTACTS
inch
0.015
grams
40