N ELECTBltJAL
EQUIPMENT--
The headlarnps on
early
Home
models
are
of
the
"dip
and
switch"
type,
in which
the
near-side lamp
beam Is dipped and
the
off-side lamp
extinguished
on
operation
of
the
dipping SWitch. On
Export
models
and
later
Home
models
both
lamps
are
fitted
with
double-filament bulbs.
Seetion
N.l
THE BATTERY
Model
GTW9A.
Capacity
(IO-hour
rate)
51
ampere
hours.
ROUTINE MAINTENANCE
In
order
to
keep
the
battery
In
good
condition,
a
periodical Inspection
should
be made and
the
following
carried
out
:-
(i)
Topping
up
About
once a
month
(more
often
in
warmer
climates),
remove
the
vent
plugs
from
the
top
of each
of
the
cells and
examine
the
level
of
the
electrolyte.
If necessary. add distilled
water
until
the
top
edges
of
the
separators
are
just
covered
on
early
models. Do
not
fill
above
this
level,
otherwise
the
excess
electrolyte
will
be
thrown
out
of
the
cell.
Later
models
are
fitted
with
a
"correct-acid-
level"
device, which is
described
in SectIon N.27.
A
hydrometer
will be found useful
for
topping
up, as
it
prevents
distilled
water
from
being spilled on
the
top
ofthe
battery.
Note.-/n
very cold weather it is essential that the
car be used Immediately
after
topping
up the battery to
ensure that the distilled water Is
thoroughly
mixed with
the electrolyte. Neglect
of
this
precaution
may result In
the distilled water freeZing, with
consequent
damage
to
the battery.
When
examining
the
cells, do
not
hold naked lights
near
the
vent
holes, as
there
is a
danger
of Igniting
the
gas
coming
from
the
plates.
(ll)
Testing
the
condition
af
the battery
Occasionally
examine
the
condition
of
the
battery
by
taklng
hydrometer
readings.
There
is no
better
way
of
ascertaining
the
state
of
charge
of
the
battery.
The
hydrometer
contains
a
graduated
float
on
which is
indicated
the
specific
gravity
of
the
acid In
the
cell
from which
the
sample
is
taken.
The speclfc
gravity
read
Ings and
thei
rind
ications
are
as follow
:-
1·280-1·300
Battery
fully charged.
About
1·210
Battery
about
half discharged.
Below '·1
SO
Battery
fully discharged.
N.2
These figures
are
given assuming an
electrolyte
temperature
of 60° F. (16
0
C.). If
the
temperature
of
the
electrolyte
exceeds
this,
-002
must
be added
to
hydrometer
readings
for
each 5"
F.
(2,8
0
C.) rise
to
give
the
true
specific graVity. Similarly ·002
must
be
subtracted
from
the
hydrometer
readings
for
every
50
F.
(2·8" C.)
below
60~
F.
(16
0
C.).
The
read
I"gs
for
each
of
the
cells shouId be
approxi-
mately
the
same.
If
one
cell gives a
reading
very
different
from
the
rest
it may be
that
the
electro-
lyte has
been
spilled
or
has leaked
from
one
of
the
cells,
or
there
may be an
internal
fault. In
this
case
It is advisable
to
have
the
battery
examined
by a
HOLD TUBE
VERTiCAllY
DO NOT DRAW
I N TOO MUCH
ELECTROLYTE
FLOAT MUST
BE FREE
Fig.
N.l.
The
hydrometer
In use
to
determine
the
condition of
the
lndlvld ual cells.
battery
specialist. Should
the
battery
be in a low
state
of
charge,
it
should
be
recharged
by
taking
the
Car
for
a long
daytime
run
or
by charging
from
an
external
source
of
D.C.
supply
at
a
current
rate
of
5
amperes
until
the
cells
are
gassIng freely.
After
examining
the
battery,
check
the
vent
plugs,
making
sure
that
the
air
passages
are
dear,
and
screw
the
plugs
into
position.
Wipe
the
top
of
the
battery
to
remove
all
dirt
and
moisture.
STORAGE
Ifa
battery
is
to
be
out
of
use
for
any
length
of
time,
it
should
first be fully
charged
and
then
given a
freshening
charge
about
every
fortnight.
A
battery
must
never
be allowed
to
remain
In a
discharged
conditIon,
as
this
will cause
the
plates
to
become
sulphated.
M.G. Midget. lssue 3 (H & E)
82966-1/54
Wishvilles Classic
Automobile Library
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