Chapter 9 Electrical
System
_4._A_lt_er_n_a_t_or
____________________________
3,4JH3(B)(C)E
(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
(R1)
1000,
2W, 1pc.
Variable resistor (Av)
0-300
Q,
12W, 1 pc.
Battery (BAT1,
BAT2)
12V, 2pcs
DC voltmeter
0-30V,
0.5 class 1 pc.
(measure at 3 points)
2) Check the regulator
in
the following sequence, accor-
ding to the diagram.
a) Check
V3,
(BAT1+BAT2
voltage). If the voltage is
20-26V, both BAT1, and BAT2, are normal.
b) While measuring
V2
(F-E terminal voltage), move
Rv gradually from the O-position. Check
if
there
is a point where the
V2,
voltage rises sharply from
below 2.0V to over 2.0V.
If
there is no such point,
the
reg1Jlator
is detective. Replace the regulator.
If
there is a sharp voltabe rise when testing, return the
Av to the 0-position, and connect the voltmeter to
the
V1,
position.
c) While measuring
V1,
(voltage between L-E terminals),
move RV gradually from the O-position. There
should
be
a
point
where
the
voltage
of
V,.
rises
sharply by 2-6V. Measure the voltabe of V,, just
before this sharp voltage rise. This
is
the regulating
voltage of the regulator.
If
this voltage of
V,,
is within
the standard limit, the regulator
is
normal.
If
the volt-
age deviates from the limit, the regulator is defective.
Replace the regulator.
l
__
E
___
F
__
L
__
R
__
R_j
4-9
Reassembling the alternator
Reassembly is done in the reverse order of disassembly.
For
reassembly, be careful of the following points (Refer
to
4-7 disassembling alternator.)
(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).
9-28
Wind
the
wire
1.5
times
around
the
terminal
groove.
1mm
Mount
the
insulation
tube
on
the
terminal
surface.
NOTES :
1.
Use non-acid type paste.
2.
The soldering iron temperature is
300~350"C.
2)
Mount the
IC
regulator on the brush holder as illustrated,
and press
in
the M5 bolt.
Do
not forget
to
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).
NOTES:
1.
Insertion pressure
is
100kg
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 calk
them using the calking tool.
Calking torque
500kg
2)
Connect the brush to the diode.
Insert the brush side terminal into the diode terminal,
calk it, and then solder into place.
3.0mm
dia
rivet.
Rivetting pressure
500kg
Printed in Japan
HINSHI·H8009
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