--------------ELE£TRItJAL
EQUIPMENT
N
from Its
holder
and ease
the
sides by lightly
polishing on
a
smooth
file. Always replace
brushes in
their
original positions. If
the
brushes
are
worn
so
that
they
no
longer
bear
on
the
commutator,
or
if
the
brush flexible
has become exposed on
the
running face, new
brushes must be fitted. If
the
commutator
is blackened
or
dirty,
clean it by holding a
petrol-moistened cloth against it while
the
engine is
turned
slowly by hand cranking.
Re-test
the
dynamo;
if
there
is
still
no reading
on
the
voltmeter,
there
is an internal fault
and
the
complete
unit
should be
renewed,
if a
spare
is obtainable.
If
the
dynamo is in good
order,
leave
the
temporary
link in position
between
the
terminals and
restore
the
original connections,
taking care
to
connect
the
dynamo terminal
.. D ..
to
the
control
box
terminal"
D,"
and
the
dynamo
terminal"
F "
to
the
control
box
terminal
.. F." Remove
the
lead from
the
.. D " terminal on
the
control
box and connect
the
voltmeter
between
this cable and a good
earthing
point
on
the
vehicle. Run
the
engine
as before. The reading should be
the
same as
that
measured directly at
the
dynamo. No
reading on
the
voltmeter
indicates a break in
Seetion
N.3
REMOVAL
AND
REPLACEMENT
OF THE DYNAMO
Remove
the
set screw securing
the
insulator pad
to
the
rear
face of
the
dynamo.
Disconnect
the
dynamo leads from
the
dynamo
terminals.
Disconnect
the
revolution
counter
drive from
the
dynamo.
To remove
the
dynamo, slacken Its
three
attachment
bolts and swing
the
dynamo towards
the
engine
to
give maximum belt slackness. Carefully free
the
belt
from
the
dynamo pulley.
Supporting
the
dynamo, completely remove its
attachment
bolts, enabling it
to
be lifted (rom
the
engine.
Replacement of the dynamo is an
exact
reversal of
this
procedure.
Seetion
N.4
DISMANTLING THE
DYNAMO
Take off
the
dynamo pulley.
Remove
the
cover band, hold back
the
brush springs
and remove
the
brushes from
their
holders.
8RUSH
COMMVTATOFl
Fig. N.S.
The dynamo
components.
the
cable
to
the
dynamo.
Carry
out
the
same
procedure
for
the"
F"
terminal, connecting
the
voltmeter
between
cable and
earth.
Finally remove link
from
the
dynamo.
If
the
reading is
correct
test
the
control
box
(see Section N.12).
Unscrew
the
locking nuts from
the
through
bolts
at
the
commutator
end.
Withdraw
the
two
through
bolts from
the
driVing
end.
Remove
the
nut, spring
washer
and flat
washer
from
the
smaller terminal (l.e, field terminal) on
the
N.S
Wishvilles Classic
Automobile Library
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