GE ML-14-0 - TROUBLESHOOTING CONTINUED; FAILURE TO CLOSE OR LATCH CLOSED; FAILURE OF CLOSING SPRINGS TO RECHARGE

GEK
7153
Spring
-
charged
Operating
Mechanism
Type
ML
-
14
-
0
ing against
the
sides
of
the
can
be made
at
the
installation
on
parts
trip
latch
assembly
support
of
the mechanism
that
are
most
subject
link
(
55
)
,
Fig
.
10
.
REMEDY
:
Check
all
mechanism
adjustments
,
latches
,
stops
,
auxiliary
devices
,
etc
.
,
in
accor
-
dance
with
section
on
ADJUST
-
MENTS
.
Examine
latch and
roller
surfaces
for
corrosion
.
Clean
as
necessary
.
to
damage
or
wear
.
IMPORTANT
:
UPON
COMPLETION
OF
AMY
REPAIR
WORK
,
ALL
MECHANISM
ADJUST
-
MENTS
MUST
BE
CHECKED
.
Refer
to
the
section
on
INSTALLATION
,
paying
particular
attention
to
ADJUSTMENTS
and
FINAL
INSPECTION
.
B
.
Check
to
see
if
the
manual
close
button
has
clearance
between
its
shaft
and
the
closing
latch
monitoring
switch
operating
lever
(
12
)
,
Fig
.
10
.
3
.
Damaged
trip
coil
.
R
EMEDY
:
Replace
damaged
coil
after
determining
reason
for
the
failure
.
TRIP
LATCH
CHECKING
SWITCH
To
remove
*
the
trip
latch
checking
switch
(
4
)
,
Fig
.
7
,
remove
the
two
mounting
screws
and
disconnect
the
lead
wires
.
Reassemble
in
the
reverse
order
4
.
Blown
fuse
in
trip
circuit
.
REMEDY
:
Replace
blown
fuse
after
determining
cause
of
failure
.
C
.
If
this does
not
cure
the
problem
,
remove
the
trip
latch
(
50
)
,
Fig
.
10
,
and
turn
it
over
180
degrees
;
then
replace
.
This
is
an
on
-
center
explained
under
ADJUSTMENTS
,
latch
and
is
occasionally
ground
slightly
off
center
.
Make
certain
the breaker
and check
the switch
adjustments
as
5
.
Faulty
connections
in
trip
cir
-
cuit
.
REMEDY
:
Repair
broken
or
loose wires
and
see
that
all
binding
screws
are
tight
.
MOTOR
LIMIT
SWITCHES
The three
switches
(
11
)
,
Fig
.
8
A
and
8
B
are
mounted
in
tandem
.
will
trip
at
minimum
volt
-
age
.
Remove
the
opening
spring
per
the
instructions
below
.
L
6
.
Damaged
or
dirty
contacts
in
trip
circuit
.
REMEDY
:
Recondition
or
replace
contacts
.
FAILURE
OF
CLOSING SPRINGS
TO
RECHARGE
2
.
Remove
the
two
mounting
bolts
(
28
)
,
Fig
.
9
,
from
the
switch
support
(
16
)
,
Fig
.
4
,
Driving
motor
inoperative
due
to
lack
of
power
.
REMEDY
:
Check
and
replace
fuses
after
determining
cause
of
blown
fuses
.
l
.
FAILURE
TO CLOSE OR
LATCH
CLOSED
3
.
Remove
the
two
mounting
screws
of
the
lower
switch
.
a
ii
Mechanism
binding
or
sticking
caused
by
lack
of
lubrication
.
REMEDY
:
Lubricate
complete
mechanism
.
1
.
4
.
Remove
the
two
mounting
screws
of
the
center
switch
.
Driving
motor
inoperative
due
to
an
opened
or
shorted
winding
.
REMEDY
:
Replace
motor
after
checking
motor
limit
switches
for
proper
setting
and
ratchet
wheel and
linkage
for
possible
foreign
objects
causing
jamming
.
2
.
5
.
Remove
the
two
mounting
screws
of
the
upper
switch
.
Damaged
or
dirty
contacts
in
control
circuit
.
REMEDY
:
Recondition
or
re
-
place
contacts
.
2
.
6
.
Disconnect
the
lead
wires
of
the
switch
which
is
to
be
replaced
.
Driving
motor
continues
to
run
but
does
not
completely
charge
springs
.
REMEDY
:
Recheck
the
pawl
clearance
“
P
”
and
“
Q
”
and
read
-
just
as
necessary
.
Move
the
motor
-
mount
assembly
in
incre
-
ments
of
1
/
64
inch
.
3
.
Reassemble
in
the
reverse
order
and check
the
switch
adjustment
as
explained
under
ADJUST
-
MENTS
.
7
.
Blown
fuse
in
closing
circuit
.
REMEDY
:
Replace
blown
fuse
after
determining
cause
of
fail
-
3
.
ure
.
TRIP
SHAFT
AND
LATCH
Faulty
connection
in
charging
circuit
.
REMEDY
:
Repair
broken
or
loose
wires
and
see
that all
bind
-
ing
screws
are
tight
.
4
.
Remove
the
trip
latch
checking
switch
operating
lever
(
5
)
,
Fig
.
1
.
7
.
REPAIR
AND
REPLACEMENT
2
.
Remove
the
cotter
pins
(
6
)
,
Fig
.
7
,
on
both ends
of
the
shaft
.
Failure
to
latch closed
.
5
.
The
following
information
covers
in
detail
the
proper
method
of
removing
various
parts
of
the
mechanism
in
order
to
make
any
necessary
repairs
.
This
section
includes
only
those
repairs
that
A
.
Bend
spring
(
57
)
,
Fig
.
10
,
to
increase
its
tension
and
make
certain
it
is
not
bind
-
3
.
Remove
the
set
screw
(
19
)
,
Fig
.
7
,
which
is
in
the
latch
shaft
(
18
)
,
Fig
.
7
.
30
Courtesy of NationalSwitchgear.com