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316
OPERATION
No.
ID
532-3
: work
on the
dynamo
ID
19
13
14
15
16
17
18
Remove
the
insulation
from
the
commutator
after
grinding
by
means
of a saw
blade
thinned
down
to
the
width
of the
insulation
or
with
a file.
Check
the
field
coils
by
means
of
a test
lamp.
With
a 110
volt
or
preferably
a 220
volt
test
lamp,
check
the
insulation
of
the
positive
brush
holder
(9)
in
relation
to
earth.
If necessary
unrivet
the
positive
brush
holder
(9).
To
re-assemble
the
end
bearing
plate
brush
holder
:
Put
the
bush
(17)
in
the
end
bearing
plate
(use
a shouldered
mandrel)
and
the
closing
plate
(18)
putting
the
felt
washer
in
between.
Knockthe
metal
back
lightly
so
as
to
retain
the
closing
plate
(18)
. . . . . . . . . . . . . . . . . . . . . . . . .
Rivet
the
positive
brush
holder
(9).
I nsert
the
rivets
in the
end
bearing
plate
(10)
and
then
insert
the
insulating
plate
(25),
the
brush
holder
(9)
:
Spring
side,
insert
the
insulating
bush
(26),
the
insulating
washer
(27),
the
steel
washer
(18),
rivet
up
the
rivet
(29).
Opposite
side,
insert
the
bush
insulating
the
connecting
plate
(30),
the
insulating
washer
(31),
the
steel
washer
(32),
rivet
up
the
rivet
(33).
Fit
the
brushes
in the
brush
holders.
Connect
the
cables
and
tighten
the
screws
fitting
the
spring
washers
under
the
heads.
Hold
the
brushes
in
the
raised
position
by
means
ofethe
springs
as
shown
on
Pl.
115.
To
assemble
the
field
coils
:
To
ensure
the
correct
positjoning
of the
pole
pieces
and
coils
in
the
body
of the
dynamo
and
to
obtain
a clearance
of
b)
C
)
0.45
mm
maximum,
it
is necessary
to
use
a mandrel
of
68.5
mm
diameter.
Put
the
field
coils
(21)
in
position
in
the
body
of
the
dynamo.
Fit
the
pole
pieces
(24)
according
to
the
markings,
provisionally
tighten
the
screws.
Insert
the
mandrel
between
the
pole
pieces,
in
a press
(use
the
mandrel
MR-1601-2
with
the
support
block
MR-1601-3,
see
Pl.
122).
Lock
the
screws
fixing
the
pole
pieces
(use
the
screwdriver
MR-1601-4
fitted
on
a
bench
press,
see
PI.
122).
Take
out
the
mandrel
from
the
opposite
side
to
that
from
which
it was
put
in
. . . . . . . . .
To
put
the
cable
harness
(23)
in
position
in
the
closing
plate
(22).
Insert
a round
head
screw
of
4 diameter
x 15 long,
fitted
with
a plain
washer
under
the
head,
in
the
plate
(34)
and
the
body
of the
dynamo.
Fix
the
earth
terminals
(20)
and
(37)
by
this
screw.
Tighten
the
nut
fitting
a serrated
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
spanner
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