Mooney M20R - Battery Trouble Shooting; Starter Trouble Shooting

MOONEY AIRCRAFT
CORPORATION
MZOR
SERVICE AND
MAINTENANCE
MANUAL
BATTERY
TROUBLE
SHOOTING
(;con’t.)
TROUBLE
PROBA/BLE
CAUSE
REMEDY
Excessive corrosion
on
mounting
Spillage
from
overfilling.
Flush
area
with
baking
soda
solution.
surface.
Leaking
or
clogged
vent
line.
Repair
or
clean
vent
line.
Charging
rat~
too
high.
Adjust voltage
regulator.
Battery
freezes.
not
Always
recharge battery
for 1/2
hour
foCReplace
battery.
chargedl7n~r;iediately.
lowing
addition of
water
in
freezing
weather.
Leaking battery
case.
Frozen
electrolyte.
Replace
battery.
Reversed
battery
polarity.
Cables
connected
backwards
Battery
should be
slowly
discharged
on
battery
olt
charger.
completely,
then
charged
correctly
and
tested
Excessive
water
consumption
in
all
Charging
ratie
too
high.
Correct
charging
rate.
cells.
Excessive
water
consumption
in
one
Cracked
jar.
Replace
battery.
cell
only.
2439-04
STARTER
TROUBLE
SHOOTING
TROUBLE
PROBABLE
CAUSE
REMEDY
Motor fails
to
operate.
Low
battery.
Check
and
recharge
battery
if
necessary.
Defective,
irrlproper,
or
loose
Refer
to
electrical
wiring
diagram
and
wire
connections.
check
all
wiring.
Binding,
wona,
improperly
Brushes
should
fit free
in
brush boxes
seated
brushes
or
brushes
without
excessive
side
play.
Clean bind-
have
excessive
side
play.
ing
brushes
and brush
boxes with
a
Var-
sol moistened
cloth.
A
new
brush should
be
run-in until
at
least
50
percent
seated;
however,
if
facilities
are
not
available
for
running
in
brushes,
seat
brush
by
insert-
ing
a
strip
of No.
.0000
sandpaper
be-
tween
brush
and
commutator
with
sanded side
next to
brush.
Pull
sandpaper
in
direction
of
rotation,
being
careful
to
keep
it
in
same
contours
as
commutator.
CAUTION:
Do
not
use cioarse
sandpaper
or
emery
cloth.
After
seating, thoroughly
clean
brushes
and
commutator to
prevent
excessive
wear.
Keep
motor
bearing
free
from
sand
or
metal
particles.
Motor
fails
to
operate
(con’t.).
Dirty
commutator.
If
commutator
is
rough
or
dirty,
smooth
and
polish
with No.
0000
sandpaper.
If
too
rough
and
pitted,
remove
commu-
tator and
turn
down.
Blow
out
all
foreign
material.
24-39-04
REV.
10-98
Island Enterprises