Filter
Top Products
40
Electrical
System
Tractors,
Lawn
and
Garden
-
110
and
ll2
15-4
Charging
System
SM-2059-
(Apr-57)
Test
Conclusions
(No
Output)
If
the
generator
will
not
produce
any
output,
check
the
commutator,
brushes
and
internal
con-
nections.
Sticking
brushes,
a
dirty
or
gummy
commutator
or
poor
connections
may
prevent
the
generator
from
producing
any
output.
Solder
thrown
from
the
commutator
riser
bars
indicates
that
the
generator
has
been
overheated
from
ex-
cessive
output.
Often
this
leads
to
an
open
cir-
cuit
and
burned
commutator
bar
s
and
conse-
quently
no
output.
(See
paragraph
4,
page
15
-5.)
If
the
brush
es
are
satisfactorily
seated
and
are
making
good
contact
with
the
commutator,
and
the
cause
of
trouble
is
not
apparent.
use
a
test
lamp
as
follows
to
lo
ca
te
the
trouble
(leads
must
be
disconnected
from
motor-generator
termi-
nals)
.
TE
S T LA'l!'
"1"766
'Hl~~
fOR GROUiW[ ,
FILLlI
~
F
ig.
6-Checking
(or
Groullded
Mo t
or·Gclle
rotar
1.
Remove
motor-generator
from
tractor.
Remove
end
frame
(comrnut
ator
end).
Raise
the
grounded
brush
from
the
commutator
and
insu-
lat
e w
ith
a
piece
of
paper.
Place
end
frame
in
place
lIsing
care
not
to
mov
e
paper
strip.
In-
stall
and
s
nug
through
bolts.
Check
for
gTounds
with
test
prods
from
th
e
g'enerator
"F"
termi-
nal
to
the
generator
fram
e,
Figure
6.
If
the
lamp
lights.
it
indicates
that
the
unit
is
inte
r-
nally
grounded.
Location
of
th
e p:ro
und
can
be
found
by
disconnecting
'
the
field
and
brush
le
ads
fr
om
the
insulated
brush
holder
and
checking
the
brush
hold
ers,
armatur
e
and
field
separately.
Hepair
or
replace
parts
as
required.
Lith
o
in
U
S.
A.
Fig.
7-CI!ecking
(or
Open
F
icld
C
ails
2.
If
the
unit
is
not
grounded,
check
the
fi
e
ld
for
an
op
en
circuit,
Fi
g
ure
7
with
a
test
lamp.
The
lamp
should
1
ight
when
one
test
point
is
placed
on
the
field
terminal
and
the
other
is
placed
on
the
armature
terminal.
If
it
does
not
light,
th
e
circuit
is
open.
If
the
open
is
due
to
a
broken
lead
or
bad
connection.
it
can
be
repaired
,
but
if
the
open
is
inside
olle
of the
field
coils,
the
coi
l
must
be
replaced.