Yamaha FZR400 Service Manual Ch89
CIRCUIT DIAGRAM
ELECTRICAL
wELEC(
FZR400WSUC
,,q
B
CIRCUIT DIAGRAM
I
L
6
B
8-l
@
B B
IL A
Ch
@
Main switch
@
Rectifier/Regulator
@
A.C. generator
@
“START” switch
@
Starter motor
@
Starter relay
@
Fuse “MAIN”
@
Battery
@
Fuse “IGNITION”
@
“ENGINE STOP” switch
@
Diode block
@I
Clutch switch
@
Sidestand switch
@
Ignition circuit cut-off relay
@
Digital ignitor unit
@
Ignition coil
@
Ignition coil
@
Pickup coil
@ Spark plug
@
Fuse “FAN”
@ Therm0
@
Fan motor
@
Fuse “SIGNAL”
@
Front brake switch
@
Rear brake switch
@
“NEUTRAL” indicator light
@,)
Neutral switch
@ “01
L” indicator light
@
Resistor
@!
Oil level switch
@
Relay assembly
switch
(#l
and #4 cylinder)
(#2
and #3 cylinder)
\ELECl
CIRCUIT DIAGRAM
@?
Starting circuit cut-off relay
@
Flasher relay
@
Cancelling unit
@
“TURN” switch
@
“TURN” indicator light
@
Front position light/Flasher light (Left)
@
Rear flasher light (Left)
@
Rear flasher light (Right)
@
Front position light/Flasher light (Right)
@
Reed switch
@
Horn
@?
“HORN” switch
@
Tachometer
@
Temp meter
@ Therm0
@
Fuel pump relay
@I
Fuel pump
@
Fuse “HEAD”
@?
“LIGHTS” (Dimmer) switch
@
Meter light
@
“HIGH BEAM” indicator light
@
Headlight
@
Tail/Brake light
@
License light
@I
EXUP control unit
@
EXUP servomotor
unit
m]
?? For California only
COLOR CODE
0
R Red
L Blue
Br
B
Y Yellow
W
G Green
P
DC3
Ch
GY
Sb
Orange
Brown
-
Black
White
Pink
Dark green
Chocolate
Gray
Sky blue
Y/R
Br/W
R/W
R/Y
-
B/R
B/W
B/Y
L/W
L/B
L/Y
G/Y
W/R
WIG
B-2
Yellow/Red
Brown/White
Red/White
Red/Yellow
Black/Red
Black/White
Black/Yellow
Blue/White
Blue/Black
Blue/Yellow
Green/Yellow
White/Red
White/Green
-.
ELECTRICAL COMPONENTS
ELECTRICAL COMPONENTS (1)
@Therm0
@Th
@
Relay assembly
@
Fuel pump relay
@Horn
@Oil
@
Neutral switch
@
Sidestand switch
switch
ermo unit
level switch
@
Sidestand relay
@
EXUP control unit
(For California only)
$j)
ServOmOtOr
EXUP
(For California only)
8-3
ELECTRICAL COMPONENTS
\ELEC( m]
ELECTRICAL COMPONENTS
@
Wireharness
@
Rear brake switch
@
Diode block
@Fuse “MAIN”
@Main switch
@Ignition coil
@Plug
cap
@Battery
@Starter relay
@Rectifier/Regulator
@Digital
(2)
ignitor unit
B-4
\I I” 112V,RAH
CHECKING OF SWITCHES
CHECKING OF SWITCHES
Check the switches for the continuity between
the terminals to determine correct connection.
Read the following for switch inspection.
SWITCH CONNECTION AS SHOWN IN
MANUAL
The manual contains a connection chart as shown
left showing the terminal connections of the
switches (e.g.,
brake switch, lighting switch, etc.)
The extreme left column indicates the switch po-
sitions and the top line indicates the colors of
leads connected with the terminals in the switch
component.
main switch, handlebar switch,
IELECI Eii
I
“C’&-0”
there is a continuity of electricity; i.e., a
circuit at the respective switch positions.
In this chart:
“R and Br” and “L/W and L/R” are continuous
with the “ON” switch position.
“B and B/W” is continuous with the “OFF”
switch position.
“B and
switch position.
“B and
with the “P” switch position.
indicates the terminals between which
cl.osed
B/W”
is continuous with the “LOCK”
B/W”
and “R and
L/R”
are continuous
CHECKING SWITCH FOR TERMINAL
CONNECTION
Before checking the switch, refer to the connec-
tion chart as shown above and check for the cor-
rect terminal connection (closed circuit) by the
color combination.
To explain how to check the switch, the main
switch is taken for example in the following.
8-5
_I-
CHECKING OF SWITCHES
1. Disconnect the main switch coupler from the
wireharness.
Never disconnect the main switch coupler
by pulling the leads. Otherwise, leads may
be pulled off the terminals inside the coupler.
2. Inspect whether any lead is off the terminal
inside the coupler. If it is, repair it.
NOTE:
If the coupler is clogged with mud or dust, blow
it off by compressed air.
3. Use the connection chart to check the color
combination for continuity (a closed circuit).
In this example, the continuity is as follows.
“R and Br” and
ous with the “ON” switch position.
“B and B/W” is continuous with the “OFF”
switch position.
“B and
switch position.
“B and B/W” and “R and
ous with the “P” switch position.
Please note that there is no continuity (an
open circuit) at all for the color combinations
other than the above.
4. Check the switch component for the continui
ty between “R and Br”.
Checking steps:
??
“LOCK”, and “P” several times.
*Set
aConnect the tester ( + ) lead to the “R” lead
terminal in the coupler and the ( - 1 lead to
the “Br” lead terminal.
B/W”
Turn the switch key to the “ON”, “OFF”,
the pocket tester selector to the ‘9 x 1”.
“L/W
and
L/R”
are continu-
is continuous with the “LOCK”
L/R”
are continu-
8-6
CHECKING OF SWITCHES
NOTE:
Use thin probes for checking the continuity.
Otherwise, the probes may contact other
minals
inside the coupler.
IiL-iii~
ter--
*Check the continuity between “R” and
at the respective switch positions of “ON”
0,
“OFF”
There must be continuity (the tester
ing “0”) at the “ON” switch position, and
there must be no continuity (the tester indicat-
ing
“oo’l)
at “OFF”, “LOCK”, or
is something wrong between “R” and
if there is no continuity at the “‘ON” position
or if there is some continuity either at the
“OFF” or “LOCK” or “P”.
NOTE:
Check the switch for continuity several times.
5.
Next go on to checking of the continuity be-
tween “B and
“R and L/R” at the respective switch positions, as in the same manner mentioned
above.
“LOCK” 0, and “P”
0,
B/W”, “L/W
and L/R”, and
“PI’.
“Br”
0.
indicat--
There
“Br”
6. If there is something wrong with any one of
the combinations, replace the switch component.
8-7
CHECKING OF BULBS
-1
CHECKING OF BULBS (FOR
HEADLIGHT, TAIL/BRAKE
LIGHT, FLASHER LIGHT, METER
LIGHT, ETC.)
Check the bulb terminal continuity for the condi-
tion of the bulb.
KINDS OF BULBS
The bulbs used in the motorcycle are classified
as shown left by the shape of the bulb socket.
@
and @ are mainly used for the headlight.
0
is mainly used for the flasher light and
tail/brake light.
0
and @are mainly used for the meter light and
other indicator lights.
CHECKING BULB CONDITION
1. Remove the bulb.
NOTE:
*Bulbs of the @ and @type uses a bulb holder.
Remove the bulb holder before removing the
bulb itself. Most of the bulb holders for this type
can be removed by turning them counterclockwise.
*Most of the bulbs of 0 and 0 type can be re-
moved from the bulb sockets by pushing and
turning them counterclockwise.
*Bulbs of the @type can be removed from the
bulb sockets by simply pulling them out.
Be sure to hold the socket firmly when
removing the bulb. Never pull the lead.
Otherwise, the lead may be pulled off the ter-
minal in the coupler.
Keep flammable products or your hands
away from the headlight bulb while it is on.
It will be hot. Do not touch the bulb until it
cools down.
8-8
CHECKING OF BULBS
2. Check the bulb terminals for continuity.
Checking steps:
*Set
the pocket tester selector to the “Q x 1”.
*Connect the tester leads to the respective bulb
terminals. Take for example a 3-terminal bulb
as shown left. First check the continuity between the @ and @ terminals by connecting the tester ( + 1 lead to the @ terminal and
the tester ( - ) lead to the @ terminal. Then
check the continuity between the @ and
terminals by connecting the tester ( + ) lead
still to the @ terminal and the tester ( - 1 lead
to the @ terminal. If the tester shows
in either case, replace the bulb.
3. Check the bulb socket by installing a proven
bulb to it. As in the checking of bulbs, connect the pocket tester leads to the respective
leads of the socket and check for continuity
in the same manner as mentioned above.
ITiETiil
@
“a”
I
8-9
IGNITION SYSTEM
CIRCUIT DIAGRAM
IGNITION SYSTEM
(ELECII
8-11
IGNITION SYSTEM
Aforementioned circuit diagram shows the ignition circuit in the wiring diagram.
NOTE:
For the color codes, see page 8-2.
@
Main switch
@
Fuse “MAIN”
@
Battery
@
Fuse “IGNITION”
@
“ENGINE STOP” switch
@Diode block
@
Sidestand switch
@
Sidestand relay
@
Digital ignitor unit
@
Ignition coil
@
Ignition coil
@
Pickup coil
@
Spark plug
@
Neutral switch
(#I
and #4 cylinder)
(#2
and #3 cylinder)
.
8-12
I
IGNITION SYSTEM
DIGITAL IGNITION CONTROL SYSTEM
DESCRIPTION
The electronic ignition that sparks the engine is
computer controlled and operated by the digital
microprocessor.
advance curve.
This programed advance curve closely matches
the spark timing to the engine’s ignition require-
I
t
i
F-
-
ments. Only one pickup coil is needed to meet
the requirements of the digital ignitor unit.
The digital ignitor also includes the control
unit for the electric fuel pump.
It has a pre-programed ignition
(ELECII
I I
[a
Pickup coil
m
Wave-shape shaping circuit
a
Edge detection circuit
DJ
Latch circuit
z
Microprocessor
Lj
Free-running counter
[G]
Comparison circuit
La
Register
[Tl
Flip-flop circuit
[JJ
Driving circuit
[KJ
Ignition coil
71
Digital ignitor unit
OPERATION
The following operations are digitally-performed
by signal from the pickup coil signal:
1. Determing proper ignition timing.
2. Sensing the engine revolution speed.
3. Determing timing for switching on ignition
coil (duty control).
4. Increasing ignition coil primary current for
starting the engine.
5. Sensing engine stall.
6. Preventing over-revolution of the engine.
8-13
IGNITION SYSTEM
TROUBLESHOOTING
IF IGNITION SYSTEM SHOULD BECOME INOPERATIVE
(NO SPARK OR INTERMITTENT SPARK)
Procedure
Check;
1. Fuse “MAIN”
2. Battery
3. Spark plug
4. Ignition spark gap 11. Sidestand relay
5. Spark plug cap resistance
6. Ignition coil resistance
7. Main switch (Entire ignition system)
NOTE:
?? Remove the following before troubleshooting.
1) Seat
2) Lower cowling 5) Air filter case
3) Center cowling 6) Crankcase cover (Left)
?? Use the following special tools in this troubleshooting.
8. “ENGINE STOP” switch
9. Neutral switch
10. Sidestand switch
12. Pickup coil resistance
13. Wiring connection
4) Top cover
r
Dynamic Spark Tester:
P/N. Y M-34487
1. Fuse “MAIN”
?? Remove the fuse “MAIN”.
?? Connect the Pocket Tester
fuse “MAIN”.
(fi
x 1) to the
?? Check the fuse “MAIN” for continuity.
CONTINUITY
8
2. Battery
?? Check the battery condition.
Refer to the “BATTERY INSPECTION”
section in the CHAPTER 3.
r
Specific Gravity:
1.280 at 20°C (68”
F)
n
CORRECT
&
*
Pocket Tester:
P/N. YU-03112
NON CONTINUITY
Replace fuse “MAIN”.
+
INCORRECT
I
8-14
*
a
3. Spark plug
*Check
?? Check the spark type.
@Check the spark plug gap.
the spark plug condition.
Refer to the “SPARK PLUG INSPECTION”
section in the CHAPTER 3.
IGNITION SYSTEM
IELECl liiiiil 1
Standard Spark Plug:
CR8E (NGK), U24ESR-N
Spark Plug Gap:
0.7 - 0.8 mm (0.028 - 0.032 in)
(N.D.)
CORRECT
a
4. Ignition spark gap
*Disconnect the spark plug cap from spark
plug.
@Connect the Dynamic Spark Tester @ as
shown.
3
Spark plug cap
3
Spark plug
@Turn
the main switch to “ON”.
INCORRECT
I
Repair or replace spark plug.
A
I
I
?? Check the ignition spark gap.
BStart
engine, and increase spark gap until
misfire occurs.
Minimum Spark Gap:
6.0 mm (0.24 in)
OUT OF SPECIFICATION
OR NO SPARK
*
MEETS SPECIFICATION
Ignition system is good.
I
8-15
7
I
5. Spark plug cap resistance
?? Remove the spark plug cap.
?? Connect the Pocket Tester
spark plug cap.
(n
x 1 k) to the
IGNITION SYSTEM
-1
@Check
r-II
@Disconnect the ignition coil coupler from
@Connect
the spark plug cap for specificated
resistance.
a
Spark Plug Cap Resistance:
63.
6. Ignition coil resistance
the wireharness.
ignition coil.
Ignition coil (Right) @ :
Tester (+) lead + Red/White @ Terminal
Tester
9 - 11 kR at 20°C (68°F)
MEETS
SPECIFICATION
a
the Pocket Tester
(-)
lead + Gray @ Terminal
(SL
x 1) to the
OUT OF SPECIFICATION
Replace spark plug cap.
Ignition coil (Left) @ :
Tester (+) lead
--f
Red/White @ Terminal
*
?? Check the primary coil for specificated
resistance.
Primary Coil Resistance:
1.8 -
2.2n
at 20°C (68” F)
8-16
IGNITION SYSTEM
I=(
Ed [
@Connect
ignition coil.
Tester (+I Lead + Spark Plug Lead
Tester
the Pocket Tester (0 x lk) to the
@
(-)
Lead + Spark Plug Lead
@
?? Check the Secondary coil for specificated
resistance.
m
Secondary Coil Resistance:
-8:
cl
7. Main switch
9.6 - 14.4 kR at 20°C (68”
(Spark Plug Lead - Spark plug)
BOTH MEET
SPECIFICATIONS
a
F)
OUT OF SPECIFICATION
Replace ignition coil.
I
I
*Disconnect the main switch coupler from
the wire harness.
?? Check the switch component for the conti-
nuity between “Red @ and Brown @
Refer to the “CHEKING OF SWITCHES”
section.
CORRECT
*
‘I.
INCORRECT
Replace main switch.
I
I
8-17
8. “ENGINE STOP” switch
)
Disconnect the
coupler from the wire harness.
~Check
the switch component for the continuity between “Red/White @ and Red/White @
SWITCHES” section.
“ENGINE STOP” switch
Refer to the “CHECKING OF
“.
IGNITION SYSTEM
INCORRECT
pqiq
CORRECT
a
9. Neutral switch
?? Disconnect the neutral switch coupler from
the wire harness.
?? Check the switch component for the conti-
nuity between ‘Sky blue @ and Ground”.
Refer to the “CHECKING OF SWITCHES”
section.
Replace handlebar switch (Right).
I
INCORRECT
Replace neutral switch.
I
CORRECT
8-18
*
n
10. Sidestand switch
B
Disconnect the sidestand switch coupler
from the wire harness.
?? Check the switch component for the conti-
nuity between “Blue/Yellow
@ “.
Refer to the “CHECKING OF
SWITCHES” section.
@,?
and Black
IGNITION SYSTEM
INCORRECT
CORRECT
&
Il. Sidestand relay
B
Disconnect the sidestand relay coupler from
the wire harness.
BConnect
battery
coupler terminals.
Tester (+) Lead + Red/White @ Terminal
Tester
Battery (+) Lead
Battery (-) Lead
the Pocket Tester (a x 1) and
(12V)
voltage to the sidestand relay
(-)
Lead
--f
Black @ Terminal
--f
Red/White @ Terminal
--f
Blue/Yellow
Terminal
@
Replace sidestand switch.
I
)Check
the relay for continuity.
CONTINUITY
a
*
NOCONTINUITY
8-19
1
Replace sidestand relay.
IGNITION SYSTEM
(ELECI
*
a
12.
Pickup coil resistance
?? Disconnect the A.C. magneto Coupler
the wire harness.
?? Connect the Pocket Tester
pickup coil terminal.
Tester (+) Lead + White/Red @Terminal
Tester (-) Lead + White/Black @ Terminal
@Check
the pickup coil for specificated
resistance.
(!2
x
100)
to the
q
from
OUT OF SPECIFICATION
Pickup Coil Resistance:
85 -
11551
at 20°C (68°F)
(White/Red -White/Black)
-
MEET SPECIFICATION
v
lYKi7Yconnection
Check the entire ignition system for
[ nections.
1
l-l
Digital ignitor unit is faulty.
Replace the digital ignitor unit.
1
Correct.Refer to the “WI RING DIAGRAM” section.
CORRECT
con-
Replace pickup coil.
I
POOR CONNECTION
I
4
I
I
8-20
ELECTRIC STARTING SYSTEM
CIRCUIT DIAGRAM
ELECTRIC STARTING SYSTEM
8-21
ELECTRIC STARTING SYSTEM
IELEC~ @i/ii
A forementioned circuit diagram shows the electric starting circuit in the wiring diagram.
NOTE:
For the color codes, see page 8-2.
@Main switch
@
“START” switch
@Starter motor
@Starter relay
@
Fuse “MAIN”
@
Battery
@Fuse “IGNITION”
@
“ENGINE STOP” switch
(@
Diode block
@Clutch switch
@Sidestand
@Neutral switch
@Starting
switch
circuit cut-off relay (Relay assembly @
)
8-22
ELECTRIC STARTING SYSTEM
STARTING CIRCUIT OPERATION
The starting circuit on this model consist of the
starter motor, starter relay, and the relay unit
(starting circuit cut-off relay). If the engine stop
switch and the main switch are both closed, the
starter motor can operate only if:
The transmission is in neutral (the neutral
switch is closed).
-1
0
II
M
-
or if
0 j.
r
1
The clutch lever is pulled to the handlebar
(the clutch switch is closed) and the sidestand
is up (the sidestand switch is closed.)
The starting circuit cut-off relay prevents the
starter from operating when neither of these
conditions has been met. In this instance, the
starting circuit cut-off relay is open so current
cannot reach the starter motor.
When one of both of the above conditions have
been met, however, the starting circuit cut-off
relay is closed, and the engine can be started by
pressing the starter switch.
w
@Battery
tarter motor
OS
@Starter relay
@Main switch
@“ENGINE STOP”switch
@Starting circuit cut-off relay
@
‘START” switch
@Neutral switch
@Clutch switch
@
Sidestand switch
WHEN THE TRANSMISSION IS IN
NEUTRAL
WHEN THE SIDESTAND IS UP AND
THE CLUTCH LEVER IS PULLED IN
I
@ T ‘t’
8-23
0
1gnl Ion
circuit cut-off relay
TROUBLESHOOTING
ELECTRIC STARTING SYSTEM
pEpq
I
Procedure
Check;
1.
Fuse “MAIN”
2.
Battery
3.
Starter motor
4.
Starter relay
5. Starting circuit cut-off relay
6. Main switch
7. “ENGINE STOP” switch
NOTE:
Remove the following before troubleshooting.
1) Seat
2) Seat cowling 4) Fuel tank
?? Use the following special tool in this troubleshooting.
Pocket Tester:
P/N. YU-03112
1. Fuse “MAIN”
?? Remove the fuse “MAIN”.
?? Connect the Pocket Tester
fuse “MAIN”.
*Check the fuse “MAIN” for continuity.
STARTER MOTOR DOES NOT OPERATE.
8.
Neutral switch
9.
Sidestand switch
10.
Clutch switch
11.
“START” switch
12. Wiring connection
(Entire electric starting system)
3) Lower cowling
NON CONTINUITY
(s2
x 1) to the
l-l
CONTINUITY
1
Replace fuse “MAIN”.
1
2. Battery
Check the battery condition.
Refer to the “BATTERY INSPECTION”
section in the CHAPTER 3.
Specific Gravity:
1.280 at 20” C (68” F
1
CORRECT
-(1
*
INCORRECT
8-24
3. Starter motor
ELECTRIC STARTING SYSTEM
p-p@
BConnect
and starter motor cable @ using the jumper
lead @ * as shown.
Y
)Check
4. Starter relay
?? Disconnect the starter relay lead.
?? Ground the starter relay lead
frame using the jumper lead @ as shown.
the battery positive terminal
the starter motor operation.
OPERATIVE
@
to the
@
@A
wire for the jumper lead must have
the equivalent capacity as that of the
battery lead or more, otherwise it may
cause the jumper lead to be burned.
aThis
check is likely to produce sparks,
so be sure that no flammable gas or
fluid is in the vicinity.
NO OPERATIVE
7
Repair or replace starter motor.
I
=
D
Check the starter motor operation.
OPERATIVE
a
5. Starting circuit cut-off relay
?? Disconnect the relay assembly coupler from
the wire harness.
?? Connect the pocket tester
battery (12V) voltage to the relay assembly
coupler terminals.
(a
x 1) and
-
z
NO OPERATIVE
I
Replace starter relay.
r--~
I
I
8-25
ELECTRIC STARTING SYSTEM
Tester (+) Lead + Red/White @ Terminal
Tester (-) Lead+ Black/Yellow @ Terminal
Tester (+) Lead + Blue/White @ Terminal
Tester (-)
?? Check the starting circuit cut-off relay for
continuity.
1
Lead-+
Blue/White @ Terminal
m
CONTINUITY
a
6. Main switch
?? Disconnect the main switch coupler and
lead from the wire harness.
?? Check the switch component for the conti-
nuity between “Red @ and Brown @
Refer to the “CHECKING OF SWITCHES”
section.
NO CONTINUITY
I
Replace relay assembly.
“.
CORRECT
v
7. “ENGINE STOP” switch
?? Disconnect the
coupler from the wire harness.
?? Check the switch component for the conti-
nuity between “Red/White @ and Red/White @ “.Refer to the “CHECKING OF
SWITCHES” section.
“ENG I NE STOP” switch
INCORRECT
Replace main switch.
8-26
ELECTRIC STARTING SYSTEM
INCORRECT
CORRECT
4L
\-
8. Neutral switch
?? Disconnect the neutral switch coupler from
the wire harness.
?? Check the switch component for the conti-
nuity between “Sky blue @ and Ground”.
Refer to the “CHECKING OF SWITCHES”
section.
CORRECT
a
Replace handlebar switch (Right).
INCORRECT
Replace neutral switch.
I
1
1
9. Sidestand switch
B
Disconnect the sidestand switch coupler
from the wire harness.
~Check
the switch component for the conti-
nuity between “Blue/Yellow @ and Black
0 “.
SWITCHES” section.
Refer to the “CHECKING OF
CORRECT
v
INCORRECT
8-27
Replace sidestand switch.
I
1
ELECTRIC STARTING SYSTEM
*
a
10. Clutch switch
?? Disconnect the clutch switch coupler from
wire harness.
@Check
the switch component for the continuity between “Blue/Yellow @ and Black/Yellow @ “.Refer to the “CHECKING OF
SWITCHES” section.
-1
INCORRECT
I
,CORRECT
11.
“START” switch
@Disconnect the “START” switch coupler
from wire harness.
@Check
the
for the continuity between “Blue/White
@
and Black 0.
ING OF SWITCHES” section.
“START” switch component
Refer to the “CHECK-
I’.
CORRECT
d
Replace clutch switch.
INCORRECT
Replace handlebar switch (Right).
I
12. Wiring connection
Check the entire ignition system for connections.
Refer to the “WIRING DIAGRAM” section.
L
I
OK
a
*
POOR CONNECTION
orrect.
IC
8-28
I
Diode block is faulty.
Replace the diode block.
I
ELECTRIC STARTING SYSTEM
*
a
I
8-29
STARTER MOTOR
@Brush
@Armature
@ Stator
@
O-ring
ELECTRIC STARTING SYSTEM
8-30
11.01
ELECTRIC STARTING SYSTEM
Removal
1. Remove:
??
Starter motor
Refer to the “ENGINE OVERHAUL
ENGINE REMOVAL” section in the
CHAPTER 4.
Inspection and Repair
1. Inspect:
0
Commutator
Dirty + Clean it with
2. Measure:
?? Commutator diameter
Out of specification -+ Replace starter
motor.
Commutator Wear Limit @ :
22 mm (0.87 in)
-1
#600
grit sandpaper.
@
-
1 MR
or more
052
3. Measure:
??
Mica undercut
Out of specification + Scrape the mica to
proper value use a hacksaw blade can be
ground to fit.
@
Mica Undercut @ :
1.8 mm
(0.07
in)
NOTE:
The mica insulation of the commutator must
be undercut to ensure proper operation of
commutator.
4. Inspect:
*Armature coil (insulation/continuity)
Defects(s)
--f
Replace starter motor.
Armature coil inspecting steps:
?? Connect the Pocket Tester for continuity
check @ and insulation check
??
Measure the armautre resistances.
8-31
0.
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