Merc-O-Tronics 98 - TESTING THE STATOR WINDING; Stator Winding Test Procedure

TESTING
THE STATOR
WINDING
1. Adjust
analyzer
for
the
following
tests
procedure.
A.
Place selector
switch
on
position No.
2.
B.
Adjust
meter,
knob for
scale
No.
2 until
meter
pointer
lineS
up
on
set
position
on
right side
of
Scale
No.
2.
2. Separate
the Stator
Winding
Connector
(the
one
with
the two
yellow
leads)
from
the harness.
3.
Take
one
small
test lead
and attach
to one
of
the copper
contacts
in
the
harness connector.
4. The other
small
test lead attach
to the
core'
5.
Read
meter
scale
No.
2,
reading
should be
infinite.
6.
Any meter
pointer movement
indicates
the winding
is
partially
grounded.
?. If
meter
pointer
moves
to
the
left,
this indicates
winding
is
grounded
or
defective.
8. If
meter
pointer does not
move
at all
remove
small
test lead con-
nected
to the core and
attach
to the other
copper
contact
in
the
harness
connector.
9. Leave
selector
switch on
postion
No. 2.
10. Read
meter
scale
No. 2
(which
is
the low
resistance
value
scale).
11.
Winding should
show
a reading
of
minimum .2 -
maximum .3.
72.
If
meter
pointer moves only
a
part
of
the way,
this indicates
a
poor
connection
or
a
partial
oPen.
13.
If
meter
pointer
does
not
move
at all or
there
is
an
infinite
reading
this
indicates
winding
is
oPen.
14.
In either case
the winding
is defective
and
stator
assembly
should
be
replaced,
or
defect located
and
repaired.
15. Internally
shorted
stator
wlndings
are
difficult
to
test due
to
the
very
low
resistance of
the
windings.
16. If aII
the
generator
and
rectifier
ehecks
are
satisfactory
but
the
output
is
low,
an
internally
shorted
stator
winding
(which
in some
cases
do
not show
up on
the
meter)
could
be
the
cause.
33