Page 446 of 513
ENGINE
at
4
to
5
V
Use
i
f
DC
voltmeter
and
set
up
a
circuit
as
shown
in
Figure
EE
56
EEQ58
L
W
R
IG
Will
r
AI
W
lli
r
N
Y
vge
I
JJ
Rtl
ublOr
I
I
Spanner
Cross
head
screwdriver
I
I
Adjusting
screw
Lock
nut
Vollm
lcl
Fig
EE
55
Adjusting
Tegulating
voltage
Charging
relay
Normal
relay
operating
voltage
is
8
to
10V
as
measured
at
alternator
A
terminal
Relay
itself
however
operates
EE059
Fig
EE
56
Testing
chaTging
Telay
Connect
positive
terminal
of
voltmeter
to
regulator
lead
connector
N
terminal
with
negative
terminal
grounded
2
Start
engine
and
keep
it
idle
3
Take
voltmeter
reading
o
Volt
Below
5
2
Volt
I
Over
5
2
Volt
I
Check
for
continuity
between
N
terminals
of
regulator
and
alternator
2
Alternator
circuit
defective
if
continuity
exists
pilot
lamp
remains
lit
I
Check
fan
belt
tension
2
If
correct
remove
regulator
and
adjust
as
necessary
Pilot
lamp
remains
lit
Pilot
lamp
relay
coil
or
contact
points
out
of
order
Replace
regulator
Over
5
2
Volt
Pilot
lamp
does
not
light
Pilot
lamp
relay
assembly
is
in
good
condi
tion
SPECIFICATIONS
AND
SERVICE
DATA
Voltage
regulator
Model
HITACHI
TLl
Z
57
Regulating
voltage
with
fully
charged
battery
and
regulator
faced
downward
V
14
3
to
15
3
at
200C
680F
EE
26
Page 447 of 513
ENGINE
ELECTRICAL
SYSTEM
Rotor
coil
inserting
resistance
n
n
10
5
at
20DC
68DF
10
Voltage
coil
resistance
Core
gap
Point
gap
rnm
in
mm
in
31
40
0
6
to
1
0
0
0236
to
0
0394
0
3
to
0
4
0
0118
to
0
0157
Voltage
coil
series
resistance
Smoothing
resistance
n
Charge
relay
Release
voltage
Voltage
coil
resistance
V
4
2
to
5
2
at
N
terminal
n
37
8
at
20DC
68DF
mm
in
0
8
to
1
0
0
0315
to
0
0394
mm
in
0
4
to
0
6
0
0157
to
0
0236
Core
gap
Point
gap
Standard
temperature
gradient
D
015
VIDC
TROUBLE
DIAGNOSES
AND
CORRECTIONS
Troubles
Trouble
location
Causes
Remedies
Not
output
Alternator
Sticking
brushes
Correct
or
replace
brush
and
brush
spring
Dirty
brushes
and
slip
rings
Clean
Loose
connections
or
broken
leads
Retighten
or
solder
connection
Replace
leads
if
necessary
Open
stator
coil
Repair
or
replace
the
stator
coil
Open
rotor
coil
Replace
the
rotor
Defective
diodes
Replace
the
diodes
assembly
Shorted
rotor
Replace
the
rotor
Shorted
stator
Repair
or
replace
the
stator
Grounded
A
terminal
Replace
the
insulator
Broken
fan
belt
Replace
the
belt
EE
27
Page 448 of 513
Low
output
Excessive
output
Regulator
Wiring
Alternator
Regula
tor
Wiring
Alternator
Regulatur
ENGINE
Faulty
voltage
regulator
point
con
tact
Broken
cable
or
disconnection
of
charging
cireui
t
Sticking
brushes
Low
brush
spring
tension
Dirty
slip
rings
Partially
shorted
ground
or
open
stator
coil
Partially
shorted
or
grounded
rotor
coil
Defective
diode
Loose
or
worn
fan
belt
Improper
voltage
regulator
adjust
ment
Faulty
voltage
regulator
point
con
tact
Defective
operation
Faulty
charging
circuit
lead
wire
connection
Loose
battery
terminal
Short
circuited
or
broken
neutral
wire
Improper
voltage
regulator
adjust
ment
Defective
operation
Improper
charge
relav
adjustment
detective
operation
and
or
faulty
point
contact
EE
28
Repair
or
replace
the
regulatur
Repair
or
replace
Correct
or
replace
brushes
if
neces
sary
Correct
or
replace
brush
Clean
Replace
the
stator
Replace
the
rotor
Replace
the
diode
assembly
Retighten
or
replace
the
belt
Check
the
voltage
regulator
op
eration
and
repair
or
replace
as
required
Repair
or
replace
the
regulator
Repair
or
replace
Retighten
Replace
the
wire
Check
the
voltage
regulator
op
eration
and
repair
or
replace
as
required
Check
the
charge
relay
operation
and
repair
or
replace
as
required