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ID
19
OPERATION
NO.
ID
532-3
: Work
on the
dynamo
Op.
ID
532-3
315
6
7
8
9
10
11
12
OVERHAULING
A DUCELLIER
7158-A
DYNAMO
Dismantling
(see
Pl.
114
and
115).
Remove
the
driving
pulley
(l),
remove
the
Woodruff
key
(2)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove
the
screws
(3)
fixing
the
end
bearing
plates
. . . . . . . . . . . , . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove
the
end
bearing
plate
(4)
driving
side,
and
the
steel
cap
(5).
Remove
the
armature
(6),
remove
the
fibre
washer
(7),
commutator
side.
Disconnect
the
output
terminal
(8)
f rom
the
positive
brush
holder
(9).
D isengage
the
rear
end
bearing
plate
(10).
Remove
the
brushes
(11)
and
(12).
Remove
the
closing
plate
(13)
for
the
housing
of
the
bearing
(14)
from
the
end
bearing
plate
(4)
by
grinding
the
heads
of the
rivets.
Take
out
the
bearing
(14)
and
the
inner
dust
cover
(15)
and
outer
(16).
Drive
out
the
bush
(17)
from
the
end
bearing
plate
brush
holder
(10)
and
the
closing
plate
(18)
by
means
of a shouldered
mandrel..............................................................................................
To
remove
the
field
coils
:
a)
Unrivet
the
feed
leads
(19)
and
(20)
from
the
field
coils
(21).
b)
Remove
the
closing
plate
(22)
with
the
cable
harness
(23).
c)
Mark
and
remove
the
pole
pieces
(24)
( using
the
screwdriver
MR-1601-4
mounted
on
a bench
press,
see
Pl.
122).
Clean
the
parts.
Assembly
(see
Pl.
114
and
115).
Check
the
armature
shaft
on
vee
blocks
or
between
centres.
Check
the
armature
on a suitable
insulation
tester.
Grind
the
commutator.
Do
not
reduce&he
original
diameter
of 47
mm
by
more
than
2 mm.
TOOLS
21 mm
box
spanner
10 mm
box
spanner
Shouldered
mandrel
:
Small
dia.
= 16.8
Length
= 15
Large
dia.
= 20
Length
= 150
Screwdriver
MR-1601-4
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