J.A.P 6 - Page 10

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SDRVICE
INSTRUCTIONS
FOR
WICO TYPE
A.57682.
MAGNETO
Installatlon
and tlrnln§
Slowly
turn
thc ongirre
cranl<shaft
in
the normal
marrner
rrntil
tlre
piston
is
approximately
;["
before top
deåd
centre
on,the
compression
strolie (i.e.
when
both
valves
are
closed).
Then
remove
ilre
magneto
contact
breaker
cover
and
turn
the
magneto
in
a clockwise
rotation
until
the
brcakcr points
close,
then rcversc
ilre
rotation
until
the
breal<er
points
just
bcgirr
t-o separate.
'Ihen
fit the
coupling
on-to
the
engine
coupling
and
sccrrre the
daqneto
rn
posltron.
To re-checl<
the
timine,
slowly
pull
thc
engirre
over
on thc
cornprcssion
s[ro'ke,
u;rd
illhe
magneto
has
becri
corrcctly
position-
ed, the
magneto
impulse
tvill
give
a clic)r
Just
atter
top
dead centre.
Tlmln§
No
adjustment
is
provided
for
timing
the
magneto,
which
is
.,n,,"""..r.y]
as
the magueto
is
correcfly
sct
bcfoie
leaving
the
works,
so that-flre
startii.rg
sparh
occurs
just
after
top
duad
ccltrc
anå
the.
running
spark
25.
belorc
top
tlcrd
contre.
Lubrlcatlon
The
magneto
is pror.irlcd
with
two
spring
oilers.
Once
ejery 200
]rorrrs
eithcr
one
of
these
oilors
should
ire
Iilk.rl
to
ovcrfiowing
with
Castrolite.
After
every
1,000
hours
it
is
trecessary
to ru-lubricate
the
carn
oil,pad.
This is
dirne
by removing
tho pad
and squeezing
and
woririrrg
into
ii
a Summer
grade
of motor
transnrission
grease
which
will
closelv
resemble
that
used
at the
factory.
Do not
usc
ordinary
grease.
Impulse
coupllnE
The
impulse
coupling
is
designed
to
give
a spark
of high
density
for
§tarting.-
It
automatically-
cuts
out
at
about"
165
r.p.m.
The
enslne
should
not
be run
contlnuously
below
thls
speed,
as thls
would
cause
unnecessary
straln
and
wear
on the
lrnpulse
parts.
The
irnltulsc
also
pror.icles
a retarded
spark
for
starting,
aritonratically
advanc-
ing
it
as tlre
enginc
spoccls
rrp, rciurning
to
the
retarded
position
wlren
the en§ine
stops.
PÅcB
I8
Cleanlng
of
lmpulse
.
If
the impulse
becomes
clogged
with
dirt,_
and
the
trip
arm fails
io
engage
or
dlscngagc,
or
the impulse
is sluggish
in
action,
it
should
be
flushed
out thoroughly
with
paraffin,
taking
care not
to
allowåny
parallin
to work
its
way
into
the magrrcib
housing.
Replacernent
of breaker
polnts
-
If
the
points
need
replacing,
both
the
fixed
and moviug points
should
be re-
placed
at the sarne
time.
To rernove
the
breaker
arrn,
take o1I the
breaker
arm clarnp
screw,
lock-washer
and
clarnping
washcr,
together
with
the
lrre:rl<cr
arrrt terminal
scrclv
and pull the
assembly
olf the
breal<er
arm pivot.
The
frxcrl
corrtact
1,llatc
rn.ry
thcn
bl takelr
otf
thc lrrcakol
arrn pivot,'alter
rorrroving
the
{ixed
contact
screw.
Romoval
of condenser
Rcrnove
screw
holding
down
the
breakcr
arrn spring.
-Ihe
condenser
is then
taken
from
thc Ilrcakcr
box
by rernoving
the two
scrcws
f:rstcniug
it
dovrn.
Rernoval
of coll
Ilemove
the
top
cover
and
the
breal<er
box
cover.
Viewing
the
magneto
{rom
the
driving
end,
rcleaie
the
pri"mary
lead
by
loosening
the right
irair<1
sia"e
earth
stud.
'Ihcn
remove
the
trvo screws
holding
down
the core
clanps.
'furn
tht:
magncto
slialt
until the
magnetism
no
longer
grips
the
coil
core
to the
main
housing,
pull
the
coil
and
the coil
core free.
The
coil is
held
on the
core
by a we<1ge.
If
the
coil is
to
be replaced,
cånsideralle
{orce
may
be necessary
to removc
the coil
from
the core.
In replacing
the
coil and
coil
core,
be sure
that,
the
ground
surface
of the
core is
against
the housing,
that
the primary
lead
[o ttre
earthing
stud is
propeily
located
and
that
the primary
earth
lead
is fastened
under
the coil
core
clamp
screw.
Breaker polnt
openlng
The
correct
breaker point
opening is
.015'.
When readjustmånt
is
,i"."rråry,
loosen
the screw
which
locks
the
fixed
contact
plate
and
turn
the
eccentric-
headed
screw
until
the
correct
opening
oI points
is
obtained.
Then
lock
thå plat6
securely.
SPARE
PARTS
LIST
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H.r,
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17