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V.
ELECTRICAL
67
Silicon diode rectifier
Check each
diode for
continuity
with
a radio tester
in high-
reading range.
If
currcm flow
only
in
one direction (from
cathode
10
anode),
the
diode is normal. Current llow in
both
djrections
or no current is a sign of malfuncticm
of lhe diode.
To
determin~
that the rectifier
is ul
good
condition,
follow
lhe
uistructions given below. Connect the negative
probe
of
the tester
to the
terminal
(
4)
(green),
and
p-0sitive prohe to
the
tenninal
(I) (yellow),
(2)
(red
and
white),
or (3)(pink).
lf
tl1e needle
swings, it
is an
indication
lhal the diode
is
nonnal
In
like manner
as above,
connect the
positive
probe to
the
tenninal
(2) and
negative probe to
the
temtinal
(I), (3)
or
(4).
The diode
is correct if continuity exists.
Continuily should
not
exist
between
any
terminals
or com
4
binations other than those described
above.
NOTE:
a.
Do
not use a mcgger
as
a high voltage generated in the
megger
will damage
the diodes.
b. Make
sure
of proper battery polarity when connecting.
Connection in re,•er,;e polarity will
shorten the
battery
service
life or cause a high
current
now throughout the
electrical
system,
resulting in damage to the diodes or
buming up the hamess.
Regulator
Make connections as shown
,n
Fig.
5-16.
Gradttally lower'
the
line
voltage
by
operating the knob of the variable
resistor. If
the needle of the
ammeter
swings
at 14-ISV, the
regulator is
correcl
If
the needle swings at less
than 14-JSV,
this could be due to internal problems. The regulator
will
have an open circuit if
the
ammeter
needle
docs not swing at
all
even if
(he
vt)ltage is raised going over the above values.
The regulator
must be
replaced
wilh
a new one.
Battery
Type
Voltage
Capacity
,,,,~.
I
12V
1 - - -
9 AH
Measuring
specific
gravity of
electrolyte
Measure
the
specific grnvity of electrolyte
in
each cell with a
hydrometer.
Recharge the ballcry when
the
reading
taken
is
below
l.
200 at
20°c
or 68°
F.
When
measuring the
hydrometer,
hold
the gauge vertically and
take
the highest
level
as shown.
'
'\.
~
'f.
I
(1)-
1
-
..
Fig.
S-
14
(1)
Silicon
diode rectifier
(2)
Connector
(1)
(2) (3)
(4)
Fig.
5-
15
(I)
Yellow lead
(2)
Red/white
lead
(3) Pink
lead
(
4)
Green
lead
~
-7_
•
:
,.
Fig.
5
I 6
(I)
Regulator
(2) Resistor ( to keep current
below 3A)
(3) Variable
resistor
(to adjust voltAge)
.
,~
"'
,..
"
'
(l)
'
.~d.l
•.
~
(I
.
~
.
!1,!I
'
...
.
•:iv
"'
Fig.
S-17
m
r
~
n /
~
-\I
L
"'
~---1
"~
~,,,., , ,
. .,,.JI
(3)
,,,;
ij
(I) Specific gravity
(2) Relationship between specific gravity and
residual charge (3) Residual charge
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