GE AM-4.16-250-9 - Page 26

GEK
-
41902
Magne
-
blast
Circuit
Breaker
mounting
flange
on
some
,
or
all
bolts
.
These
shims
are
for
squaring
up
the
bushing
and
may
be
required
when
new
bushings
are
assembled
.
Referring
to
Figure
24
,
disassemble
the
primary
contact
springs
(
6
)
as
previously
described
.
Disassemble
the
spring
retainer
(
4
)
by
removing
mounting
bolts
(
5
)
.
MOTOR
,
RELAY
AND
LIGHT
SWITCHES
5
Two
or
three
switches
(
7
)
Figure
6
,
are
mounted
in
tandem
as
required
by
the
application
.
Remove
the
opening
spring
per
instructions
below
.
Remove
(
2
)
mounting
bolts
(
4
)
from
switch
bracket
(
5
)
.
Remove
the
(
2
)
mounting
screws
of
the
lower
switch
.
Remove
the
(
2
)
mounting
screws
of
the
center
switch
.
Remove
the
(
2
)
mounting
screws
of
the
upper
switch
.
%
I
4
.
1
.
2
.
5
.
3
.
Referring
to
Figure
22
,
disassemble
the
contact
support
(
4
)
and
interrupter
mounting
bracket
(
2
)
removing
two
bolts
(
3
)
.
6
.
i
!
4
.
li
Reassemble
in
the
reverse
order
.
The
interrupter
mounting
bracket
(
2
)
is
not
symmetrical
and
must
be
assembled
cor
-
rectly
to
orient
the
interrupter
properly
on
the
breaker
.
The
longest
projection
of
the
bracket
should
be
toward
the
lower
end
of
the
bushing
.
7
.
5
.
i
6
.
Disconnect
the
lead
wires
of
switch
to
be
replaced
.
7
.
Reassemble
in
the
reverse
order
and
check
switch
adjustment
as
explained
under
AD
-
JUSTMENTS
.
TRIP
SHAFT
AND
LATCH
(
See
Figure
11
)
1
.
Remove
spring
discharge
crank
(
5
)
,
manual
trip
lever
(
13
)
and
if
furnished
,
the
latch
checking
switch
operating
arm
(
8
)
Figure
12
from
the
trip
shaft
.
2
.
Disengage
trip
latch
spring
(
4
)
Figure
11
.
3
.
Remove
three
(
3
)
cotter
pins
from
trip
shaft
.
4
.
Remove
trip
arm
screw
(
12
)
and
trip
latch
set
screw
(
10
)
.
5
.
Place
a
block
between
the
trip
latch
(
11
)
and
the
left
side
of
the
mechanism
frame
.
Drive
the
trip
shaft
to
the
left
until
the
latch
is
free
of
the
key
,
then
remove
the
key
.
6
.
Check
for
and
remove
any
burrs
raised
around
the
keyway
on
the
shaft
to
avoid
damaging
the
trip
shaft
bearings
.
7
.
Shaft
,
latch
,
etc
-
.
,
may
now
be
removed
by
driving
it
to
the
left
.
Note
quantity
and
location
of
washers
used
as
spacers
in
the
assembly
.
8
.
Reassemble
parts
in
reverse
order
.
Be
sure
trip
latch
is
aligned
in
center
of
trip
latch
roller
and
that
the
latch
spring
is
properly
installed
.
Check
latch
adjustment
as
de
-
scribed
under
ADJUSTMENTS
.
TRIP
LATCH
ROLLER
BEARING
1
Front
Bushing
Open
the
breaker
and
remove
the
box
barrier
and
interrupters
as
already
de
-
scribed
.
1
.
2
.
Remove
the
upper
and
lower
horizontal
barriers
(
18
and
20
)
Figure
8
.
Remove
the
connection
bar
(
15
)
Figure
23
,
cup
bearing
(
6
)
and
hinge
pin
(
7
)
.
Remove
the
four
bolts
at
the
mounting
flange
of
the
front
bushing
being
removed
,
and
lower
the
bushing
.
(
See
note
under
rear
bushings
concerning
use
of
shims
.
)
When
reassembling
,
first
mount
the
bushing
and
assemble
the
cup
bearing
(
6
)
,
contact
arm
(
8
)
,
and
replace
pin
(
7
)
being
sure
the
silvered
contact
washers
between
the
bush
-
ing
and
contact
arms
are
in
place
.
The
contact
surfaces
at
the
hinge
point
of
the
contact
blade
and
bushing
should
have
a
thin
coating
of
D
50
H
47
grease
.
Check
all
contact
adjustments
as
outlined
under
ADJUSTMENTS
.
»
i
3
.
K
a
!
i
!
4
.
I
f
%
i
id
&
i
5
.
1
Hi
i
?
a
I
II
II
I
'
ll
il
:
6
.
m
ip
S
'
INTERLOCK
SWITCH
I
v
To
remove
the
interlock
switch
(
4
)
Figure
12
,
remove
the
two
mounting
screws
and
disconnect
the
lead
wires
.
Reassemble
in
the
reverse
order
and
check
the
switch
adjustments
as
explained
under
ADJUSTMENTS
.
ill
fH
i
$
III
Ilf
II
LATCH
CHECKING
SWITCH
j
!
1
1
1
.
Remove
(
2
)
cotter
pins
at
ends
of
trip
latch
roller
shaft
(
8
)
Figure
13
.
2
.
Partially
remove
shaft
out
right
side
of
frame
until
latch
roller
(
6
)
is
free
.
3
To
remove
the
latch
checking
switch
(
7
)
Figure
12
,
(
when
furnished
)
,
remove
the
two
mounting
screws
and
disconnect
the
lead
wires
.
Reassemble
in
the
reverse
order
and
check
the
switch
adjust
-
ments
as
explained
under
ADJUSTMENTS
.
I
Hi
3
?
Sill
|
|
ji
ill
II
m
26
f
H
Courtesy of NationalSwitchgear.com