N ELECTRI(jAL
EQUIPMENT------------~
I.
Switch
settingoutof adjustmentor switchcontactsdirty
If
the
cove r of
the
wiper has been damaged,
or
if
the
switch has been
tampered
with,
the
contacts may be
remaining permanently
open.
Remove
the
cover
and
see
that
the
switch
control
moves
freely-when
the
cover
Is removed
the
switch contacts should remain
closed. Examine
the
contacts and if necessary clean
them
with
fine
emery
cloth.
2.
Loose
or
broken
connections
Remove
the
wiper
cover
and examine
the
wIring
of
the
motor.
If necessary, re-solder any connections
which
are
loose
or
broken.
BRUSH
LUBRICATOR
ARMATURE
Fig. N.19.
The windscreen
wiper
with its cover removed, showlna:
Its i
nte
r na I co ns
tructlon
.
3. Brush worn out or not bearing on commutator
The
brushes
are
carried in small boxes and
are
pressed against
the
commutator
by means of springs.
See
that
the
springs press firmly on
the
brushes and
that
they
do
not
foul
the
sides of
the
brush boxes.
The
brushes
must
be clean and move freely in
their
holders. To remove
the
brushes
for examination, hold
back
the
springs by means of a bent piece of
wire
and
gently lever
the
brushes from
their
holders.
If
the
brushes
are
dirty
or
greasy, causing
them
to
stick
in
their
holders, clean
them
with a cloth
moistened
with
petrol.
When
refitting
the
brushes, replace
them
in
the
same boxes and in
the
same positions as originally
fitted, In
order
to
preserve
the
brush bedding.
If
the
brushes have become
worn
to
such an
extent
that
they
no longer make good
contact
with
the
commutator,
they
must
be
renewed.
Replacement
brushes can be obtained from any Lucas Agent.
N.14
4. Armature
binding
or
bearings
stiff
Turn
armature
by hand for several
revolutions-If
it Is consistently
tight
the
wiper
probably needs
lubrication (see paragraph
8). If
the
armature
is only
tight
occasionally.
the
stiffness Is probably In
the
gearbox
or
Is caused by
dirt
or
other
foreign
matter
In
the
air
gap
between
the
armature
and
the
pole
shoes. Remove
the
wiper
back plate and
examine
the
gears and links for evidence of stiffness.
5. Commutator dirty
Clean
the
commutator
by means of a cloth moistened
with
petrol.
Carefully remove any carbon
dust
from
between
the
segments of
the
commutator.
6.
Brush
gear short-circuited
This may be caused
either
by damage
to
the
wiper
cover
or
to
a
stray
conductor
making
contact
with
the
brush gear. Rectify
the
damage
to
the
wiper
cover
or
fit a new
cover
and
remedy
any
other
damage.
7. Armature damaged
If.
after
following
the
preceding examination,
the
wiper
still does
not
operate
or
its performance Is
unsatisfactory,
the
fault may be
due
to
the
armature
being damaged. Fit a
replacement
armature.
8.
Lubrication
If
the
rotor
is consistent!ystiff
when
tu
rned by hand,
add a few
drops
of
thin
machine
011
to
the
lubricator
provided.
When
examining
the
gearbox,
if necessary,
lightly pack
the
gears with agood-quality hlgh-melting-
point
zinc-oxide grease, such as
Duckham's
Keene]
KG.25.
Section
N.14
THE ELECTRIC HORNS
MODEL WT614
All
horns
before being passed
out
of
the
Works
are
adjusted
to
give
their
best
performance
and will
give a long period of service
without
any
attention
~
no
subsequent
adjustment
is
required.
If
one
of
the
horns
falls 0 r becomes uncertaln in Its.
action, it does
not
follow
that
the
horn
has
broken
down.
First ascertain
that
the
trouble
Is
not
due
to-
some
outside
source, e.g. a discharged
battery,
or-
loose connection
or
short
circuit In
the
wiring of
the
horn;
a.
short
circuit in
the
horn wiring will cause
the
fuse
to
blow. If
both
horns
fail
or
become
uncertain
In action,
the
trouble
Is proba.bly
due
to
a discharged
battery
or
blown fuse. If
the
fuse has blown, examine:
Wishvilles Classic
Automobile Library
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