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------ELECTRICAL
EQUIPMENT
N
§ HA 0 PRESS
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SHOULDERED
MANDREL
Reassembly
In
the
main
the
reassembly of
the
dynamo is a
reversal of
the
operations
described In Section N.4.
Before refitting
the
dynamo
to
the
vehicle, unscrew
the
Iubricatorfrom
the
com
mutator
end
bracket,
I
lft
out
the
felt
wick and
spring
and half
fill
the
cap with high-
melting-point grease
to
Ref. 0 (page P.2). Replace
SUPPORTINf,.
BLOCK
---~
fig. N.9.
The
correct
method of fitting
the
bronze
bearing bush
on
the
dynamo.
Note
the
supportlrog blocks.
(page P.2). This will allow the
pores
ofthe bush
to be
filled
with lubricant.
The
ball bearing at
the
driving end is replaced as
follows
:-
(0) Knock
out
the
rivets
which
secure
the
bearing
retaining plate
to
the
end
bracket
and remove
the
plate.
(b)
Press
the
bearing
out
of
the
end
bracket
and
remove
the
corrugated
washer, felt
washer
and oil retaining
washer.
(c) Before fitti ng
the
replacement
bearing
see
t hat it is clean and pack It with a high-melti ng-
point grease.
(d) Place
the
oil retaining washer, felt
washer
and
corrugated
washer
in
the
bearing housing in
the
end bracket.
(e) Locate
the
bearing in
the
housing and press It
home
by means
of
a hand press.
(D Fit
the
bearing retaining plate.
Insert
the
new
rivets
from
the
Inside of
the
end
bracket
and
open
the
rivets by means of a punch
to
secure
the
plate rigidly in position.
fig. N.S.
To~fi(
the
pole shoes correctly an expander- of
the
type
illustrated is
required.
(D Locate
the
pole shoes and field coils by lightly
tightening
the
fixing
screw.
(g) Insert
the
pole
shoe
expander,
open it
to
the
fullest
extent
and
tighten
the
screws.
(h) Finally
tighten
the
screws by means of
the
wheel-operated
screwdriver
and lock
them
by caulking.
(j) Replace
the
insulation piece
between
the
field
call connections and
the
yoke.
8earings
Bearings which
are
worn
to
such an
extent
that
they
will allow side
movement
of
the
armature
shaft must
be
renewed.
To
renew
the
bearing bush at
the
commutator
end.
proceed
as follows
:-
(a) Press
the
bearing bush
out
of
the
commutator
end
bracket.
(b) Press
the
new bearing bush
into
the
end
bracket.
using a
shouldered
mandrel of
the
same
diameter
as
the
shaft which is
to
fit in
the
bearing.
Note.-Before fitting the
new
bearing bush it
should
be
allowed
to stand completely immersed
for twenty-four hours in thin engine oil to Ref. F
Armature
The
testing
of
the
armature
winding
requires
the
use of a voltage
drop
test
and
growler.
If
these
are
not
available.
the
armature
should be checked by
substitution.
No
attempt
should be made
to
machine
the
armature
core
or
to
true
a
distorted
armature
shaft.
N.7
Wishvilles Classic
Automobile Library
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