Fl
EXHAUST
EMISSION
CONTROL
SYSTEMS
IMPORTANT
NOTICE
The
Exhaust
Emission Systems covered
in
this publication
meet
State and
Federal
requirements for hydrocarbon and carbon
monoxide
emissions.
To
assure continued proper operation,
these
systems
must
be
inspected
regularly,
parts must be replaced
at
factory-recommended intervals and
engine
tune-up services performed at intervals specified in the
Exhaust
Emission
Con
trol
System Maintenance charts.
For
the
above
reasons,
these
systems
must not, under any circumstances,
be
altered
to anything other than
required
specifications provided in this publication.
Further,
the
Exhaust
Emission
Control
System, or any
of
its components, must
not be physically altered or modified in any respect.
DHTfl
TAG
For
the serviceman's guidance, each vehicle equipped with exhaust emission
control
will
have data
tag
permanently affixed
to the
radiator shroud—-in
example:
VEHICLE
EMISSION
CONTROL
INFORMATION
MODEL
F4-134
C.I.D.
•
ENGINE
AT
NORMAL
OPERATING
TEMPERATURE
•
LIGHTS
AND
ALL
ACCESSORIES OFF
•
IDLE
MIXTURE
. . .
LEAN
BEST
IDLE
•
IGNITION
TIMING
0*
(TDC)
•
SPARK
PLUG
GAP
. . . .030
•
DWELL
...
42* (.020
POINT
GAP)
•
IDLE
SPEED
. . .
700-750 RPM
TRANSMISSION
IN
NEUTRAL
DURING
TUNE
UP
SEE SERVICE MANUAL
FOR
ADDITIONAL INFORMATION
THIS VEHICLE CONFORMS
TO U.S.
DEPT.
OF
H.E.W.
REGULATIONS APPLICABLE
TO
1971 MODEL YEAR NEW MOTOR VEHICLES
Jeep
CORPORATION
14401
Important:
Always refer
to
the data tag when checking or re-adjusting ignition
timing,
idle speed, and idle mixture. 148
'Jeep'
UNIVERSAL SERIES SERVICE
MANUAL
F2
F2-35.
EXHAUST EMISSION CONTOL SYSTEM
DISTRIBUTOR SPECIFICATIONS
Distributor:
Make
Delco-Remy Prestolite Prestolite
Model...
1110376
IAT-4501 or IAT-4502 IAT-4502A
Breaker
Point Gap .016"
[0,406
mm.] .016"
[0,406
mm.] .016"
[0,406
mm.]
Breaker
Arm Tension 19 to 23 oz. [538 a 652 gr.] 17 to 22 oz. [482 a 623 gr.] 17 to 22 oz. [482 a 623 gr.]
Cam
Angle. 29° to 31° 29° + 3° 29° ± 3°
Max.
Auto Advance
(Crankshaft
Degrees). 13° to 15° at 1,950 rpm. 16° (& 1800 rpm. 21° @ 1800 rpm.
26°
@
4200
rpm. (Max.) 32° @
4200
rpm. (Max.)
Max.
Vac. Advance
(Distributor
Degrees) 8° 8° 8°
Condenser Capacity. .18 to .23 mfd. .25 to .28 mfd. .25 to .28 mfd.
Timing:
Crankshaft
5°
(BTC)
@ Idle 5°
(BTC)
© Idle 0°
(TDC)
© Idle
Mark
Location Crankshaft Pulley Crankshaft Pulley Crankshaft Pulley
Firing
Order
1-6-5-4-3-2 1-6-5-4-3-2 1-6-5-4-3-2
F2-36.
SPARK PLUG
GAP
Spark
Plug Gap. .035"
[0,889
mm.]
IMPORTANT
NOTICE
The
Exhaust Emission Systems covered in this publication
meet
State and Federal
requirements for hydrocarbon and carbon
monoxide
emissions.
To
assure continued proper operation,
these
systems
must be inspected regularly,
parts must be replaced at factory-recommended intervals and
engine
tune-up services
performed at intervals specified in the Exhaust Emission Control System Maintenance
charts.
For
the
above
reasons,
these
systems
must not, under any circumstances, be altered
to anything other than required specifications provided in this publication.
Further,
the Exhaust Emission Control System, or any of its components, must not be physi
cally
altered or modified in any respect.
DATA
TAG
For
the serviceman's guidance, each vehicle equipped with exhaust emission control
will
have data tag permanently affixed to the radiator shroud — in example:
VEHICLE EMISSION CONTROL INFORMATION MODEL V6-225 C.I.D.
•
ENGINE
AT
NORMAL OPERATING TEMPERATURE
•
LIGHTS
AND ALL
ACCESSORIES
OFF
•
IDLE MIXTURE
.. .
LEAN BEST IDLE
•
IGNITION TIMING
0*
(TDC)
*
SPARK PLUG
GAP 035
•
DWELL
. . . 30* (.016
POINT
GAP) •
IDLE SPEED
. . .
650- 700
RPM
TRANSMISSION
IN
NEUTRAL DURING TUNE
UP
SEE
SERVICE MANUAL FOR ADDITIONAL INFORMATION
THIS VEHICLE CONFORMS
TO U.S. DEPT. OF H.E.W.
REGULATIONS APPLICABLE
TO
1971
MODEL YEAR
NEW
MOTOR VEHICLES
Jeep
CORPORATION
14400
NOTE:
The
above
tag applies to vehicles equipped with Distributor Model
IAT-4502A.
On
vehicles equipped with Distributor Models
1110376,
IAT-4501 and IAT-4502 the tag is the same
except
that Ignition Timing is 5°
T.D.C.
Always
refer to the data tag when checking or re-adjusting ignition timing, idle speed, and idle mixture.
159
'Jeep*
UNIVERSAL
SERIES
SERVICE
MANUAL
H
FIG.
H-59—HEAD LAMP
1—
Door
2—
Retaining
Screw
3—
Retaining
Ring
4—
Sealed
Beam
Unit
5—
Mounting
Ring
6—
Adjusting
Screw 7—
Housing
8—
Wires
9—
Door
Screw 310669
to cross the vertical
tapes
at the measured height
of each lamp center respectively.
g.
Remove the head lamp doors.
h.
Clean
the head lamps.
H-132.
Aiming Head Lamps
a.
Turn
the headlights on low beam. Cover the lamp not being aimed. Be sure to use the horizontal reference line on the screen that is the same dimen
sion as the vehicle lamp height.
b.
Turn
the vertical aiming screw counterclock
wise until the lamp beam is considerably lower
than
the horizontal reference line on the screen.
Then,
turn
the screw clockwise until the top
edge
of the high intensity
area
is even with the horizontal
line.
See Fig. H-60.
I
(T)
JT)
1'.'' | '':'
11460
FIG.
H-60—HEADLIGHT AIMING
CHART
1—
Vertical
Tape,
Left
Lamp
Center
2—
Vehicle
Centerline
3—
—Vertical
Tape,
Right
Lamp
Center
4—
Zone
of Greatest Intensity
5—
2
*
(Two Inches)
6— 25'0
'
7—
2
*
(Two Inches)
8—
Height
of
Lamp
Centers
9—
Horizontal
Tape
Note:
Always bring the beam into final position
by turning both aiming screws clockwise so that
the unit is held under proper tension when the operation is complete.
c. Turn
the horizontal aiming screw counterclock
wise until the beam is off.
Then,
turn
the same
screw
clockwise until the
left
edge
of the high
intensity area is 2" [5,08 cm.] to the right of the
lamp center line. See Fig. H-60.
d.
Cover the lamp that has been aimed and aim
the other lamp using the same procedure.
e.
Carefully
reinstall the head lamp doors.
H-133.
Parking
and
Turn Signal Light
The
parking lights are mounted in the radiator
guard
panel just below the headlights. These lights
are
on only when the main switch control knob is
pulled
out to the first notch.
To
replace a parking lamp, remove two screws allowing the lens and colored reflector to be re
moved. Replace the lamp, which is recessed back
in
the housing.
If
the
complete
parking light assembly is to be
removed for service or replacement, disconnect the
wire
plug at the back of the housing.
Then
remove
the nuts and lock washers securing the parking light assembly and remove out the front of the
panel.
H-134. Tail, Stop
and
Turn Signal Light
Refer
to Fig. H-57 and H-58.
The
tail
lights are mounted in the
rear
corner
posts
of the body. They are on whenever the main switch
control
knob is pulled out to any position.
a.
To replace a lamp, remove the snap ring on
early
models
and remove the lens; on late
models
remove lens screws, lens and gasket.
Clean
lens
and
reflector before replacing.
b. To remove the parking and
tail
light housing,
disconnect wiring, remove the two nuts and lock
washers securing
tail
light assembly to body and remove from
rear
of body.
H-135-
Backup Lights •
Refer to Fig. H-61.
The
backup lights on late production vehicles are located on the
rear
of the vehicle directly below
the
tail
light. The backup lights are actuated
through a switch when the ignition is on and the
transmission
is in reverse. 215
ELECTRICAL
SYSTEM
14385
FIG.
H-61—BACK-UP
LIGHT
1—
Snap
Ring
2—
Lens
3—
Gasket
4—
Bulb
5—
Housing
and
Cable
On
late production
T14A
transmissions the backup
light switch is threaded into the right
rear
corner
of the cover housing and is activated by the move
ment of the reverse shift
rail.
The
backup light switch is not serviceable and
must be replaced if defective.
Bulbs
can be replaced by removing the snap
ring,
lens and gasket from the assembly.
H-136.
License Plate
Light
On
CJ-5A,
CJ-6A
and current production vehicles
the license plate light is attached to the tailgate
and
is of the swing-type design to enable the
license plate to be visible when the tailgate is in
the down psoition. The bulb can be changed by
removing
the clear plastic lens. On early production
vehicles the license plate light is integral with the
tail
light assembly.
H-137.
Horn
The
horn is mounted under the hood on the
left
front
fender. The horn is sounded by pressing the
button located at the top center of the steering
wheel.
To
remove the horn wire, disconnect the wire at
the snap connection at the base of the steering
column.
Pull
off the rubber horn button cap and
the brass contact cap from the steering wheel nut.
This
will
expose
the contact tip of the horn wire.
Pull
the wire out of the steering column from the top. Refer to Fig. H-62.
H-13S.
Directional
Signals
Fig.
H-63 shows the
wiring
of a
composite
direction
al
signal
circuit.
The most frequent causes of
failure
in
the directional signal system are
loose
connec
tions and burned-out bulbs. A flashing rate
approximately
twice the normal rate usually in
dicates a burned-out bulb in the
circuit.
11087
FIG.
H-62—HORN
BUTTON 1—
Cap
2— Nut
3—
Horn
Button
Spring
Cup 4—
Ferrule
5—
Horn
Cable
6—
Contact
Disc
7—
Steering
Wheel
8—
Cup
9—
Bearing
Spring
Seat
10—
Steering
Column
11—
Tube
12—
Bearing
13—
Bearing
Spring
14—
Horn
Button
Spring
15—
Retainer
Spring
When
trouble in the signal switch is suspected it
is advisable to make the following
test
to definitely
locate the trouble before
going
to the effort of
removing
the signal switch. If, for example, the
right
rear
stop
light and right front parking light
are
inoperative and switch failure is indicated, first put the control lever in neutral position.
Then
disconnect the wire to the right side
circuit
and
touch it to or bridge it to the
"L"
terminal, thus
by-passing the signal switch. If the right side cir- 10609
FIG.
H-63—DIRECTIONAL SIGNAL
CIRCUIT
1—
Flasher
2—
Ignition
Switch
3—
Control
4—
Light
Switch
5— Stop
Light
Switch
216
I
CLUTCH 1-1.
GENERAL
The
clutch on current 'Jeep' vehicles is either
Auburn
or Borg and Beck manufactured. Vehicles
equipped with F4-134
engines
have an
Auburn
9.25" [23,4 cm.] single plate dry-disc clutch. The
pressure plate has three coil pressure springs and
three levers or fingers.
The
V6-225
engine
is equipped with a 10.4" [26,4
cm.] Borg and Beck single plate dry-disc clutch.
The
pressure plate utilizes either a finger-type
diaphragm spring, or a coil
type
spring pressure plate for clutch release.
The
driven plates of all
models
are built with
vibra
tion damper springs and have two flexible facings
which
provide
smooth
engagement
of the
engine
power.
Early
'Jeep' vehicles equipped with a Dauntless
V-6
engine
use a 10.4" [26,4 cm.] single plate, dry-
disc clutch, incorporating a diaphram-type spring assembly.
The
clutch is of the centrifugal single dry disc
type
and
consists of the clutch disc, pressure plate and
the clutch release bearing.
The
clutch is actuated by a clutch pedal and a
series of mechanical linkage.
When
the clutch pedal is in the
engaged
position,
the clutch disc facings are clamped
between
the
friction surface of the
engine
flywheel and the face of the clutch pressure plate, thereby connect
ing
engine
power to the transmission. Depressing
the clutch pedal actuates the clutch release shaft
fork
which
moves
the clutch release bearing against
the clutch fingers.
This,
in
turn,
moves
the pressure
plate away from the clutch disc. Since the disc is splined to the transmission input shaft, the clutch
disc and transmission input shaft
will
stop
when
the clutch is disengaged, thereby disconnecting
engine
power from the transmission.
1-2.
Clutch
Maintenance
To
obtain normal life and satisfactory performance
from any clutch it must be correctly operated and
properly maintained. Two conditions which shorten
clutch life are continuous operation of the clutch
release bearing and clutch slippage.
The
clutch release bearing is
designed
for inter
mittent use. If run continuously the bearing
lubri
cant
will
become
exhausted causing the bearing to
become
dry, noisy, or
will
seize, resulting in clutch
finger or diaphragm wear. The clutch must be properly adjusted so that the release bearing is
free of the clutch fingers or diaphragm at all times,
except
when the clutch pedal is depressed.
Excessive
clutch slippage
often
occurs when the
vehicle is overloaded, the vehicle load is applied
too quickly, or when the pressure of the clutch fingers or diaphragm is only partially applied to the clutch plate.
Friction
between
the clutch facing
and
flywheel produces
excessive
heat causing
burned,
glazed and worn linings, resulting in shortened clutch life. Avoid clutch slippage under
heavy loads by using a lower gear or reducing the load.
1-3.
Clutch
Pedal
Linkage
and Adjustment
Adjust
the clutch pedal free travel whenever the clutch
does
not
disengage
properly, or when new
clutch parts are installed. Improper adjustment of
the clutch pedal free travel is one of the
most
fre
quent causes of clutch failure and can be a con tributing factor in
some
transmission failures.
As
the clutch facings wear the free travel of the clutch pedal diminishes. When sufficient wear oc
curs
the pedal clearance must be adjusted.
Two
types
of clutch linkage have
been
used on Jeep vehicles, a cross shaft
tube
and lever
type
shown in Fig. 1-1, and a clutch control cable
type
shown in Fig. 1-2. The clutch pedal adjustment
procedures for both
type
linkages are as follows.
•
Cross
Shaft
Lever
and Tube Type
Refer
to Fig. 1-1.
Note:
Two different
Clutch
Control
Lever
and
Tube
Assemblies have
been
installed on 'Jeep*
Universal
vehicles equipped with a V-6
engine
and
T14A
transmission.
Should difficulty in shifting the transmission be
noted, check the length of the clutch release pedal
rod,
item (16) in Fig. 1-1. Measure the distance
between
the centerlines of the cotter key holes.
FIG.
1-2—CLUTCH
LINKAGE AND
ADJUSTMENT,
CONTROL
CABLE TYPE
A—Top
View,
Cable
to
Clutch
Fork
1—
Retracting
Spring
(Clutch
Fork)
2—
Clutch
Fork
3—
Ball
Adjusting Nut
4—
Lock
Nut 5—
Clutch
Cable
B—Side
View,
Cable
to
Clutch
Pedal 6—
Clutch
Cable
Support
Bracket
7—
Clutch
Cable
Housing
8—
Anchor
Bracket-to-Frame Side
Rail
9—
Retracting
Spring
(Clutch
Pedal)
10—Clutch
Pedal Assembly
*
© © ©
1437S
226
'Jeep'
UNIVERSAL SERIES SERVICE
MANUAL
The
correct distance should be 10%"
[26,04
cm.].
If
the length of the clutch release pedal rod is
other than
10
W
[26,04
cm.], the vheicle is equipped with the early
type
Clutch
Control
Lever
and
Tube Assembly, which should be removed, and^trie latest
designed
parts should be installed.
The
free pedal clearance is adjusted by lengthening
or shortening the" clutch fork cable. To make this adjustment,
loosen
the jam nut on the cable clevis
and
lengthen or shorten the cable to obtain %"
[19,05
mm.] free travel at the pedal pad, then
tighten the jam unit.
•
Clutch
Control Cable Type
Refer
to Fig. 1-2.
a.
With the clutch pedal pad against the floor
panel, (pedal up, clutch
engaged)
adjust ball ad
justing nut until slack is removed from the cable
and
the clutch throwout bearing contacts the clutch
pressure plate, release levers or diaphragm plate.
b. Back-off ball adjusting nut 2
V2
turns to obtain
approximately %"
[19,05
mm.] free travel.
Lock
hex nut.
FIG.
1-3—AUBURN
CLUTCH
ASSEMBLY —
HURRICANE F4 ENGINE 1—
Driven
Plate and Hub
2—
Pressure
Plate
3—
Pivot Pin
4—
Bracket
5—
Spring
Cup 6—
Pressure
Spring 7— Release
Lever
8—
Return
Spring
9—
Adjusting
Screw
10—
Jam
Nut 11—
Washer
Note:
Some older 'Jeep' vehicles may
develop
side
movement
of the clutch and brake pedals resulting
from wear of the pedals, shafts, and bushings. One way to
compensate
for this wear is to install a pedal
slack
adjuster kit 1-4.
CLUTCH
—
HURRICANE
F4
ENGINE
•
Auburn
Vehicles equipped with the Hurricane F4
engine
have a 9.25" [23,4 cm.] driven plate. The auburn clutch driving (pressure) plate assembly (Fig. 1-3)
has three pressure springs and three levers or
fingers.
1-5.
Clutch
Removal
When
necessary to remove the clutch,
follow
the procedures outlined in Section J for the removal
of the transmission and transfer case from the vehicle. Then remove the flywheel housing and use
the following procedures for removing the clutch assembly.
Note:
The F4
engine
may be removed from the
vehicle when inspecting or replacing the clutch.
Refer
to Section D for Hurricane F4
engine
removal and then
follow
the instructions given
below
to remove the clutch assembly.
a.
Mark
the clutch pressure plate and
engine
fly
wheel with a center punch so the clutch assembly
may be installed in the same position after adjust
ments
or replacement are completed.
b. Remove the clutch pressure plate bracket
bolts
equally, a little at a time, to prevent distortion and
to relieve the clutch springs evenly.
c. Remove the pressure plate assembly and driven
plate from the flywheel.
1-6.
Clutch
Pressure Plate and Disc Inspection
Inspect the pressure plate face for
cracks,
chips,
and
warpage.
Check
the pressure plate levers for
excessive
wear and the springs for breaks. If any of the
above
conditions exist, the
complete
pressure
plate must be replaced.
Check
the clutch disc for
excessive
wear,
loose
or damaged facings, broken
vibration damper springs and evidence of grease
or oil. If any of the
above
conditions exist, replace
the clutch disc.
1-7.
Clutch
Pressure Plate Adjustment —
Auburn
The
clutch pressure plate must be checked
before
installing a new or reconditioned clutch. The proper 11339
FIG.
1-4—CHECKING
AUBURN
CLUTCH
LEVER
ADJUSTMENT
1— Adjustment Gauge
2—
Fixture
Mounting Bolt
3—
Clutch
Fixture
227
CLUTCH
©—*
11378
FIG.
1-5—ADJUSTING
AUBURN
CLUTCH
LEVERS
1—
Gauge
5—Mounting Bolt
2—
Clutch
Lever
6—Clutch
Pressure
Plate
3—
Adjusting
Screw
7—Thickness
Spacer
4—
Locknut
8—Clutch
Adjusting
Fixture
spacer thickness and
gauge
length is listed in
Par.
1-30. Use
Clutch
Adjusting Fixture W-296
and
proceed as follows:
a.
Place the thickness spacers
between
the pressure
plate face and clutch adjusting fixture. Locate the spacers under the pressure plate levers and at the
center of the pressure plate face, see Fig. 1-5.
b. With the spacers properly installed, bolt the
pressure plate to the adjusting fixture.
Draw
the
bolts
down evenly a little at a time until they are
tight.
c. Using the proper
gauge
length check the lever adjustment as shown in Fig. 1-4.
d.
Lever
adjustment can be altered by removing
the lever clips, loosening the locknut and turning
the adjusting screw (Fig. 1-5) in or out as required.
FIG.
1-6—REMOVING
PILOT
BUSHING
1—
Flywheel
2—
Pilot
Bushing
3—
Pilot
Bushing Remover 1-8. Pilot Bushing Inspection and Replacement
•
F4 and V-6 Engine.
Inspect the transmission main shaft pilot bushing
which
is pressed into the center of the flywheel on
the Hurricane F4
engine
and in the center of the
crankshaft
on the Dauntless V-6 engine. If the bushing is worn or damaged, it should be removed,
using a pilot bushing remover. Screw the tapered end of the tool into the damaged bushing, allowing
the tool to cut its own threads until a solid grip is obtained. Insert the puller screw and rotate it
until
bushing is forced out of flywheel, Fig. 1-6 or
crankshaft.
To
install a new bushing, slide the bushing
onto
the end of a pilot bushing installing and burnishing tool and insert the bushing into flywheel or
crank
shaft. A
soft
hammer can be used against the tool
to help drive the bushing in place. When the tool
is removed (by tightening the cap and pressure
nut as shown in Fig. 1-7), the bushing
will
be
burnished
to correct size. Apply a small amount of
lubricant
to the bushing bore.
FIG.
1-7—INSTALLING
PILOT
BUSHING
1—
Pilot
Bushing
Installing
and
Burnishing
Tool
2—
Flywheel
1-9.
Clutch
Installation
a.
Inspect
Clutch
Disc
Before the clutch disc is installed, it should be
carefully
inspected for warpage. If grease or oil is evident on the friction facings, the facings should
be replaced and the cause of oil accumulation cor rected. Excessively worn facings should also be
replaced with factory recommended parts.
b. Inspect
Clutch
Release Bearing and Sleeve
The
clutch release bearing and
sleeve
are attached to the front facing of the transmission case by a
spring.
Check
the bearing and
sleeve
for evidence
of grease leaks from within the bearing or for wear
and
looseness.
Replace parts as necessary. 228
'Jeep'
UNIVERSAL
SERIES SERVICE
MANUAL
I
Note:
The clutch release bearing is lubricated at
time of assembly and no attempt should be made
to lubricate it Refer to Fig. 1-23 when lubricating
the clutch throwout bearing collar. c. Reassembly
To
assemble the clutch to the flywheel, first put
a
small amount of light cup grease in the flywheel
pilot bushing, install the driven plate, with short
end of hub toward the flywheel, then place the pressure plate assembly in position.
With
a clutch
plate aligning arbor or a spare transmission main
shaft, align the driven plate splines leaving the
arbor
in position while tightening the pressure plate
screws evenly.
Next, assemble the flywheel housing to the
engine
and
reinstall the transmission and transfer case or
install
the
engine
in the vehicle, depending on the
procedure of removal. Make sure that the clutch
release bearing
carrier
return spring is hooked in place. For the remainder of the assembly reverse
the operations that were used in removing the
transmission and transfer case or the
engine
referring
to the instructions given in Section J for the transmission and Section D and Dl for the
engine.
d.
Adjust the clutch control cable so there is 3A" [19,05 mm.] free pedal travel. (Refer to Par. 1-3)
1-10.
CLUTCH
—
DAUNTLESS
V-6
ENGINE
•
Diaphragm Spring Type
(Early
Models)
*
Jeep' vehicles equipped with a Dauntless V-6 en
gine
use a 10.4" [26,4 cm.] single-plate, dry-disc
clutch,
incorporating a diaphragm-type spring as
sembly.
When
the clutch pedal is depressed, it
moves
the
clutch
fork in the direction shown in Fig. 1-8. The
clutch
fork, pivoting on a
ball
stud, acts upon the
throwout bearing. The bearing then forces the
prongs of the diaphragm spring in the direction shown in
Fig.
1-8. The diaphragm spring is mounted
so that it pivots on its retaining rings.
This
reverses
the direction of force.
Force
is applied directly to
the three retracting springs which then
move
the
pressure plate
rearward,
away from the driven plate.
The
clutch driven plate assembly slides freely on
the transmission main drive gear splined shaft. It is keyed to the gear shaft by ten splines. The
front end of the main drive gear shaft is piloted by a bushing pressed into a recess in the
rear
end
of the
engine
crankshaft. See Fig. 1-8.
The
outer area of the driven plate is divided into
segments
formed in low waves to provide springs
between
the plate facings and cushion
engagement
of the clutch. A molded facing is riveted to each
side of every
segment.
When the clutch is fully
released, the waved
segments
cause the facings to
spread
approximately .045" [1,14 mm.]. Pressure
plate movement provides an additional clearance
of approximately .030" [0.76 mm.] to assure
full
release of the driven plate. See Fig. 1-8.
The
driven plate assembly is designed to prevent
torsional fluctuation of the
engine
from being
transmitted to the transmission gears. Its hub is
FIG.
1-8—CLUTCH
RELEASE
ACTION
1—
Pressure
Plate 5—Engine
Crankshaft
2—
Throwout
Bearing
6—Pilot
Bearing
3—
Pivot
Point
7—Flywheel
4—
Clutch
Fork
8—Driven
Plate
driven
through torsional coil springs; additional
frictional
dampening is supplied by molded
fric-
tional washers.
1-11.
Clutch
Removal
a.
Remove transmission as described in Section J. b. Remove clutch throwout bearing and pedal re
turn
spring from clutch fork.
c. Remove flvwheel housing from engine.
d.
Disconnect clutch fork from
ball
stud by forc
ing it toward the center of the vehicle.
e.
Mark
clutch cover and flywheel with a center
punch
so that cover can later be installed in the same position on the flywheel.
This
is necessary to
maintain
engine
balance.
f. Loosen the clutch attaching
bolts
alternately,
one
turn
at a time, to avoid distorting the clutch
cover flange, until diaphragm spring is released.
g. Support the pressure plate and cover assembly
while removing last bolts; remove pressure plate
and
driven plate from flywheel.
Caution:
Use extreme care to keep clutch driven plate clean.
h.
If it is necessary to disassemble pressure plate,
remove three drive strap-to-pressure plate
bolts
and
retracting springs. Remove pressure plate from
clutch
cover.
Note:
When disassembling,
note
position of
grooves
on
edge
of pressure plate and cover. These marks must be aligned in assembly to maintain balance.
i.
The clutch diaphragm spring and two pivot rings
are
riveted to the clutch cover. Inspect spring, rings
and
cover for excessive wear or damage. If there
is a
defect,
replace the complete cover assembly.
1-12.
Clutch
inspection
Wash
all metal parts of clutch, except release bear
ing and driven plate, in suitable cleaning solution to remove
dirt
and grease. If solvent
seeps
into
bearing,
lubricant may be dissolved. Cleaning sol
vent
will
also damage the facings of driven plate,
a.
Inspect friction surfaces of flywheel and pres
sure
plate for scoring or roughness. Slight roughness
may be smoothed with fine emery cloth. If surface 229