Chapter 9 Electrical System
4. Altemator
4LHASer
(
(6) IC regulator
Connect
the variable resistance, two 12V batteries,
resistor, and voltmeter as shown in the diagram.
1) Use the following measuring devices.
Resistor
(R,)
Variable
resistor (Rv)
Battery
(BAT,,
BAT,)
DC
voltmeter
100Q,
2W,
1pc.
0—300Q,
12W, 1pc.
12V,
2pcs.
0—30V,
0.5
class
1pc.
(measure at 3 points)
2)
Check
the regulator in the following sequence, accor-
ding to the diagram.
a)
Check
V, (BAT, + BAT, voltage). If the voltage is
20—26V,
both
BAT,
and
BAT,
are normal.
b)
While
measuring V, (F-E terminal voltage), move Rv
gradually from the 0-position.
Check
if there is a
point where the V, voltage rises sharply from below
2.0V
to over 2.0V. If there is no such point, the
regulator is defective.
Replace
the regulator. If there
is
a sharp voltage rise when testing,
return
the Rv to
the 0-position, and connect the voltmeter to the V,
position.
c)
While
measuring V, (voltage between L-E terminals),
move Rv gradually from the 0-position. There should
be
a point where the voltage of V, rises sharply by
2—6V.
Measure the voltage of V,
just
before this
sharp
voltage rise. This is the regulating voltage of
the regulator. If this voltage of V, is
within
the stan-
dard
limit,
the regulator is normal. If the voltage
deviates
from the
limit,
the regulator is defective.
Replace
the regulator.
R,
_L
— BAT,
. BAT,
0-position
4-11.9
Reassembling the
altemator
Reassembly
is done in the reverse order of disassembly.
For
reassembly, be careful of the following points. (Refer
to 4—7
disassembling
altemator).
(1)
Assembling
the brush regulator
1) Solder the brush.
Position
the brush as shown in the drawing and solder
it. Be careful not to let the solder drip
into
the pig tail
(lead wire).
11±0.5mm
(0.413~0.4M8in
:
)___^2s
Si
Wind the wire 1.5 times
around the terminal groovi
Brush
1mm (0.039in.)
Mount the insulation tub
on the terminal surface.
NOTES: 1. Use non-acid type paste.
2.
The soldering iron temperature is 300
350
o
C.
'
2) Mount the IC regulator on the brush holder as il
lustrated, and press in the M5 bolt. Do not forget tc
assemble
the bushing and the connecting plate at the
same
time.
(If the bushing is
left
out, the
output
terminal will be
earthed and the battery short-circuited).
M5
bolt
NOTES:
1.
Insertion pressure is
981
(100) N(kgf)
2.
Insert
vertically.
(2) Connecting the brush regulator assembly and diode
1)
Check
the rivets
Place
the rivets as shown in the figure, and then
call"
them using the calking tool.
Calking
force
4903
(500)N(kgf)
2) Connect the brush to the diode.
Insert
the brush side terminal
into
the diode terminal
calk
it, and then solder
into
place.
3.0 mm
(0.1181
in.) dia
Rivetting pressure
4903(500)N(kgf)
9-31
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