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ID
19
OPERATION
No.
ID
532-3
: Work on the dynamo
Op.ID
532-3
319
40
41
42
43
44
45
46
47
Grind
the
commutator.
Do
not
reduce
the
original
diameter
of
41.5
mm
by
more
than
2 mm.
Remove
the
commutator
insulation
after
grinding
by
means
of a saw
blade
thinned
down
to
the
width
of the
insulation
or
with
a file.
Check
the
field
coils
with
a test
lamp.
With
a 110
volt
or
220
volt
test
lamp
check
the
insulation
of
the
positive
brush
holder
(22)
in
relation
to
earth.
Unrivet
the
positive
brush
holder
(22).
To
reassemble
the
end
bearing
plate
brush
holder.
4
b)
4
Put
the
bush
(18)
in
position
in
the
end
bearing
plate
(using
a shouldered
mandrel)
and
the
closing
disc
(19).
Knock
back
the
metal
of
the
end
bearing
plate
to
retain
it
. . . . . . . . . . . . . .
. . . .
. . .
. . .
. . . . . . . . . . . . . . . . . . . . .
To
rivet
the
positive
brush
holder
(22).
1.
Spring
side:
Place
on
the
round
head
rivet
the
insulating
washer
and
the
insulating
bush.
Insert
the
rivet
thus
prepared
into
the
end
bearing
plate;
then
fit
the
insulating
plate
(24),
the
steel
packing
(25)
and
the
brush
holder
(22).
Rivet.
2.
Connection
side:
Engage
the
flat
head
rivet
in
the
square
of the
connection
(26)
and
in
the
brush
holder
(22),
the
steel
packing
(25),
the
insulating
plate.
Turn
over
the
end
bearing
plate.
Insert
the
insulating
bush
(27),
the
insulating
washer
(28),
the
plain
washer
(29).
Rivet
the
rivet
(30).
Fit
the
brushes
(20)
and
(21)
in
the
brush
holder.
Connect
the
cables
and
tighten
the
screws,
fitting
serrated
washers
under
the
heads.
Hold
the
brushes
in the
raised
position
by
means
of the
springs
as
shown
on
Pl.
117.
To
fit
the
field
coils:
To
ensure
correct
positioning
of
the
pole
pieces
and
coils
in
the
body
of the
dynamo
and
to
obtain
a clearance
of
0.45
mm
maximum,
it
is necessary
to
use
a mandrel
of
72.6
mm
dia.
a)
Put
the
field
coils
(13)
in
the
body
of the
dynamo.
Fit
the
pole
pieces
(17)
according
to
the
markings,
tighten
the
screws
provisionally.
b)
Insert
the
mandrel
between
the
pole
pieces,
in
a press
(using
the
mandrel
MR-1601-2,
with
support
block
MR-1601-3,
see
P1.122).
Tighten
the
fixing
screws
(using
the
screwdriver
MR-1601-4,
fitted
under
a bench
press,
see
Pl.
122).
Take
out
the
mandrel
from
the
opposite
side
to that
from
which
it was
put
in
. . . . . . . . . . . . . .
Fix
the
earth
terminal
(15)
for
the
field
coils
(13)
with
the
terminal
of the
earth
lead
(31)
of
the
regulator.
Replace
the
original
rivet
by
a round
head
screw
with
a nut
and
spring
washer
.
. . .
.
.
. . . .
. . . . .
. . . . . . . .
TOOLS
Shouldered
mandrel
Small
dia.
= 16.8
Length
= 15
Large
dia.
= 20
Length
= 150
Mandrel
MR-1601-2
Support
block
MR-1601-3
Screwdriver
MR-1601-4
7 mm
box
spanner
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