Datsun BLUEBlRD P 410 Series Service Manual page 212

Causes for mechanIcal troubles
FaIlure
to
operate
IS
caused
In
many
cases
by
the
guIde
shaft
on
the
movIng
core
of the
magnetIc
SWItch
maIn
CIrCUIt
52
stIckIng
agaInst
the
cover hole
CorrectIon
can
be made
In
thIs
case
by loosenIng
the
cover screws
4
pIeces
and
retIghtenmg
them
so
that the shaft
moves
freely
2 PrecautIon
In removIng nuts from the
magnetIc
swItch
maIn
CIrcuIt
termInals when
In
stallIng
or
removIng cables the lower
nut
of
the
double
nuts
should be
kept
In a
tIghtened state
whIle unscrewIng
If the lower
nut
IS
loose the terrmnal
bolt may
turn
together
anrl
ground
the terrmnal
to
the
cover
and
cause
damage
Starter Troubles
Their Causes and Remedies
The
follOWIng
IS a
lIst of troubles WhICh
can
be deterrmned from the state
the
starter
IS
Installed
on
the engIne
1
Starter falls
to
turn
The engIne
IS
checked
to
see
If
It
can
be
cranked
by
hand
If
It cannot
be cranked
the
engIne
IS at
fault and should be
checked If
It
can
be cranked
eaSIly
the starter
IncludIng
the
wInng should be checked
and
correctIons
made
accordIngly
Is the
battery run
down
Check the
speCIfIC gravIty
of the battery
flUId
to
see
If
It
IS over
1
240 and
recharge or
replace
the battery
as
found necessary
All loose battery
and
ground
cables
should be cleaned and
properly
tIghtened
Magneto
grease
or
Gargoyle
BRB
No 1 All cord
connectIons
are
carefully tIghtened
and
speCIal
attentIon gIven
to
the condItIon of
InsulatIon
The
assembly
check
IS
made
by
testIng
the
starter
as
FIg
4
Torque Teshng
Apparatu
a
SIngle UnIt
USIng
a
fully charged
battery
Tests
are
made WIth
a
starter motor tester
or
WIth the
apparatus
shown
In
FIg
4
by
WhICh
brakIng otrque
IS
measured In thIs
case
the normal value should be 0 9
m
kg
Construction
of Magnetic
Switch and Instructions
The
magnetIc
SWItch
IS an
apparatus
when the engIne
IS
bemg
started
by
ShIft
lever
serves
to
close the
CIrCUIt
between the battery
and the
starter motor
and
perrmts
a
large current to
flow and
actuate
the
starter motor
After
startIng or
when the
engIne
IS
stopped
the swItch
serves
to
keep
the
CIrCUIt open
The prInco
pies
of
operatIon
can
be
seen
from
FIg
5
Closmg
the
starter
SWItch S
I
allows
the current
to
flow
through
the
magnetIc
199