Datsun 1000 Workshop Manual page 155

DRIVE END BRACKET
BRUSH END 8RACJlET
l
STATOR
WINDINGS
TERMINAL NUTS AND WASHERS
I
i 1
HALF PULLEV FAN
WASHER SEAL
ji
COVER
I
I
SPACER
l
SJE
030
A
BR S
NUT
L o e
l7
t
CUP
WASHER
ROTOR ASSV
BEARING
THROUGH BOL TS
BRUSH
OLDER
WASHER
SLIP RINGS
INSULATOR
RETAINER SCR
9 Electrreal
System
NUT
f
W
OLOER
COVER
Exploded
View of Hitachi LT125 06 and L T133 05 Alternator
Repeat
the
tests to
all diodes
in turn The
globe should
light
when the leads
are
connected
in
one
way
only
If anyone
or more
of the diodes
prove
faulty
a new
heat
sink
or
the
faulty
diode
s
will have to be
replaced
Models
LT126 06
and
LT133 0S
These
nits
have the diode
mounted in
a
rectifier
pack
assembly
and should
anyone
diode
prove
unserviceable the
rectifier
pack will have
to
be replaced
as an
assembly
Connect
a
pair of
test
leads
to
a
12
volt
battery
with
a
1 5 watt
globe
in series with
one
lead
Connect
one
test
lead
to the A terminal
connecting
link
and the other lead
to each heat sink
in turn
the
globe
should
light only
when the lead is connected
to
one
of the
heat sinks if the
globe fails
to
light
or
light
in
both
cases
the
rectifier diode
pack
is unserviceable which
will
necessitate
a
renewal
of
the assembly
Brush
Springs
and Brushes
1 Brush
spring tension is tested with
a
push type
spring
tension
gauge
push
the
sptlng
and
brush
into
the
brush holder
with
the gauge
until the
face of
the brushes
and holder
are
flush A serviceable
spring should give
a
reading
within specification
limits
Replace
unserviceable
springs
2 The brushes should protrude from their holders
without tension
on
their
springs
when
checking
brush
length
Fit
new
brushes when the
measurement is
less than
specified
Bearings
Check both tracks and balls
or
rollers for
chips
and
roughness Fit
new
bearings
when in
doubt of the
serviceability
of the old
bearings
TO ASSEMBLE
The assembly procedure
is
the
reverse
of
the
dismantling operations with attention
to
the
following
poin ts
I
Carry
out the
cleaning
operations
and the
testing
and
checking
of component parts
as
laid down in the
appropriate
sections
2 Replace all
worn
damaged shorted
or
open
circuited components
3 Take
care
not to damage the
slip ring assembly
when
refitting
4 Resolder the field leads
to the
slip rings using
a
very
hot
soldering
iron
5 Ensure that both ball
races are
serviceable
Fit
new
bearings
when
in
doubt
6 Press the
slip
ring and
bearing onto
the
rotor
shaft
7 Instal the
bearing dust
seal
into
the drive end
bracket with
the
bearing bearing retainer and
retainer
screws
8
Press
the
bearing
and drive
end bracket
onto the
rotor
shaft
using
a
hollow arbor that will
fit
over
the rotor
shaft and
contact the
bearing centre
NOTE
When
jitring bearings always apply
the
fitting
pressure
on
to
the section
of
the
bearing being fitted Do
not apply
pressure
through the balls
or
rollers
9
Instal the fan
spacer
and fit
the
woodruff
key
when used into its
keyway
10 Fit the fan
with
the blades towards the alternator
I
I
Instal the pulley lock washer and
nut
tighten
the
nut
to 3 8
kg
m
27 ft lb
12 On LTI25 02 and AS202SA
I models resolder
the
stator
leads
to
the diodes
according
to
the
tags
and
marks made before
unsoldering
the leads take the
necessary precautions
to protect the diodes from
being
damaged by excessive heat
13 Resolder the terminal
wiring
back
onto
their
original positions
14 Align
the marks made
on
the brush end bracket
and
stator
laminations before
dismantling and
assemble the
two
components while
feeding the terminal
wiring
or
stator
leads
through
the end bracket
cover
plate hole
15 Instal the heat sink
assembling
bolts and
insulation
washers
as
noted when
dismantling
and tighten
the retaining
nuts
evenly
156