(
(
SDRVICE INSTRUCTIONS F'OR WIPAC
TYPE CJ
936
IN§TALLING
M,dGNEI'O
Slowly turn the engine crankshaft in
the normal manrler untii the
piston
begins
to rise
on
the cornpression
stroke
(i.e.
whea
both
valves
are ciosed). Next
agaemblo the steel floating couplinq on to
the engine coupling. Iiinally take the
magneto
and turn the magneto shaft
anti-clochwise until the impulse
pav.
enuages the irnpulse stop, then siorvly turn
the magneto
shaft
in
the
opposite
direction
until the trvo
driving
dogs
are
in line
with the two free
slots
in the steel coupliDg
atrd
secure
the magneto in
position.
To
re-check the
timing, slowly
pull
the
engino
ovor on the cornpression
stroke, and
i{ the
magneto has
been
correctly
positioned,
tho
magneto impulse
will
give
a
click
jurt
before
top
dead centre.
TIMING
No
adjustment
is
provided
for timing
the
magneto,
which
is unnecessary, ae
the
magneto
ia
correctly
set before
Ieaving
the
works, eo that the starting sparl
occurr
just
before top
dead centre arrd
the running spark in
accordance u'ith
details
on Pages
Nos. 5, 6 and 7.
LUBRICATION
Tho
only
part
requiring attention in
the
field
is
the canr oil
pad
which should
be
re-lubricated
after every 1,000 houre.
This is done
by
renroving
the
pad
and
squeezing and
working
into it
a
Surnmer
grado
oI motor trangmissiou
grease
which
will
closely resemblo that used
at
the
factory.
Do
not
uee
ordlnary
gtease
aB thlo wlll
splash on
to
the
trreaker
polnts
cauelng
ml8flrlng and
dlfflcult
startlng.
The main bc.aring
situated
at
tire
rear
end of
the magneto is
packed
with grease
before
leaving
the v'orks and should
be
rertewed
oirly u'henever the rnagneto ie
servicecl.
'lhe
flont
main
bearing is oil
impregnateci
and slrr.ruld only
require
a
fol'
rirops of lubri<;aring oil
at the same
t
me.
Pacr
lt)
MAGNETO
IMPULSE
COUPLING
The
impulse coupling is designed to
give
a sparh of high
density
for
starting.
It
automatically cuts out
at about
165
r.p.m.
'fhe
engine
should
not
be
run
continuously
below this
speed, as thio
would cause
unnecessary strain and
$,ear
on the impulse
parts.
'IIte
impulse
also
provides
a
retarded
spark for
starting,
automatically advanc-
ing it
as the engine
speeds
up, returning
to the retarded
position
when tho
engino
Btops.
CLEANING
OF
IMPULSE
II
the
inrpulse becomes
clogged with
dirt, and
the
trip arm fails to engage or
disengage, or
the
impulse
is sluggish in
action,
it should be Ilushed out thoroughly
rvith
parafi&n,
taking care
not to ellow
any
paralfin
to
work
its way into the
magneto housing.
BREAI(ER POINT
OPENING
Itemove
cover acrows
and
cover to
obtain access
to the
breaker
points.
Ihe correct
breaker
point
opening
ia
.015'.
When re-adjustrnent is necessary,
loosen the
screrv *'hich
locks tho fixed
contgct
plate
and
raise or lower the
plate
until the correct opening of
points
h
obtained, then
lock the
plate
recuroly.
REPLACEMENT
OT'
POINTS
BREAKER
The
breaker
points
are
supplied
ae
an
assembly
including the fixed and movoable
point,
the die-cast back
plate
and
oil
pad. To rcmove the original assembly
loosen the breakor arm
apring retainer
screw and
release
the
two leads
coming
from
the coil
and
condenser,
then removc
the
trvo screws securing
tho dio-cast
back
plato
to
the main housing.
When
fitting the new breaker
point
assembly
secure the die-cast back
plato
in
an approximate
position
and adjuct
the
breaker
point
opening to
'015',
then
slightlv
lnoceri
the
lrvo
back
pl,ato
rcrawl
and tuln
the
plate
rvithin
its
slots until
the
breaker pornts
begiu to open
and
when the
rotor larninations
itave
lelt
the
core larninations
by
apitroximately
1l»'.
Finally
tighten the
trvo screws
ancl
reconnect
tl're
two leads {rorn
the coil
and condenser,
RDMOVAL
OF'
CONDDNSII,R
'Ihe
condenser
is housed in
the
base
of
the main housing
immediatelv
below
the
breaker
points.
Remove the hexagon
nuts
securing
the
connecting lead
and
earthing
strip. Unscrew
the condcnser
out
of
its housing,
using
a
special
tool,
part
nurnber
00146,
but before doing
thie
it is
advisable first to
rernove the
magneto
cover so that the
connectin(
load
can
be
pushed
back into the ruain
housing
out
of
the
way of the
tool.
REPLACEMENT
Or
II,T.
LEAD
The
H.T. Iead is
secured
to
the
II.T.
coil
by
passing
the
rvire through the
srna.'!l
hole
in
the coil
II.T.
tab
and twisting the
rvire
around
this
tab.
When rernoving,
or
refitting
a new H.T. lead
exercise
the greatest
care to ensure
that no
damagt
is
done
to the
coil.
Never
solder the FI.T.
lead
to
the
tab
because even
with the greatest
caro
it is possible
to sever
the internal
con-
nection. This
would
not immediately
be
apparent, but the
defect would
cause
the coil
to breali
down within
a com-
paratively
short
period.
RI'T{OVAL OF COIL
Remove
covor
and H.T. Iead.
Loosen
the
breaker
arm
spring retaining
ecrew
and release the
primary
lead. Thon
remove the two hexaqon posts
holding
dos'n
thc
core clarnps, this
will
also
releasc tlie earth
prirnary
lead. Turn
tho
magncto shaft until the magnetism
no
longer
grips
the coil
core to the
main
housing, pull
the coil and the
coil coro
froe.
hr replacing the coil
and coil core
bo
sure
that the primary
earth
lead ia
fastened under the
coil coro hexagon
posts
and
the insulated
primary
lead to
tl.re
breaker arm spring rotaining
acrew,
Plcr
19
To Next Page
Loading...