- 57
-
(B-138)
(3)
Contact No.
1
should exert a pressure against contact No.
2
(Figure
88A).
Hook an
8
oz. scale around contact spring No.
1,
just
below the contact point, and pull horizontally toward the left. It
should require
1
to
2
ozs. to just separate contacts No.
1
and No.
2.
Adjust
b.y
bending contact spring No.
1.
(4)
Recheck
(2).
(5)
There should be a clearance of at least
.01511
between No.
3
and No.
4
contacts (Figure
88A).
Adjust by bending contact spring No.
3.
(
6)
lJove the send-receive lever to
the
RECEIVE
p
os
i
t
ion (down) and
make
sure that
No.
3
and
No.
4
contacts close.
(7)
There should be at least
.015'"
clearance between No. l and No.
2
contacts.
(See Figure 87C). Adjust
by
bending contact· spring No.
2.
Recheck
(2).
(S) Contact No.
3
should exert a pressure against contact No.
4.
Hook an
8
oz. scale around contact spring
No.
3
just above the contact point
and pull horizontally toward the le.t't.
It should require
l
to
2
ozs.
to just separate contacts N
o
.
3
a.nc1
No.
4.
(See Figure 87C). Adjust
by
bending contact spring No.
4.
(9)
Recheck (5).
(10)
With the left end of the upper contact lever held
agai
n
s
t
the
notch
in the stop lever
plate,
th·e fibre insulator on No.
6
co
n
tac
t spring
should clear the extension on the upper contact lever
by
at
least
.008".
(See Figure
86A).
Make
certain
that con
tact
s
No.
5
and No.
6
ar
e
separated
by
a
t least
.015"
when
the
break
l
e
ve
r is operated.
(See
Figure 87B).
Adjust by bending contact spring No.
6.
(ll) Contact No.
6
should
exert
a pressure
ag�st contact
No.
5.
Hook
an
8
oz.
scale around
contact
spring No.
6
just
above the contact point
and
pull
horizontal
ly
toward the right. It should require
4-1/2
to
5-1/2
ozs.
to just separate contacts No.
5
and
No.
6.
(See
Figure 87C).
Ad
j
us
t
b.y
bending
contact spring No.
5.
(12) Recheck
(10).
CONTROL RELAY ADJUSTMENTS
(A)
For
BREAK
operation the control rela.;y
should
be
adjusted
to
meet the
following
requirements:
{See Figure
89A)
(1)
lfith the relay plunger held operated, there
should be
.005•
t o
.015"
clearance between the contact surfaces of the outer and middle con
tact springs. Adjust
b.y
bending the outer contact spring.
(2)
With the plunger held operated, there should be
.025"
to
.030"
clear
ance between the contact surfaces of the i
nn
e
r
ani
mi ddle contact
springs. Adjust
by
bending the
inner
contact spring.
