CLUTCH
6 - 1
CLUTCH
CONTENTS
page
CLUTCH
DIAGNOSIS
2
CLUTCH
COMPONENTS
MECHANICAL COMPONENTS
The clutch mechanism
in
AD
models with
a gas or
diesel engine consists
of a
single, dry-type clutch disc and
a
diaphragm style clutch cover.
A
hydraulic
linkage
is
used
to
engage/disengage
the
clutch disc
and cover.
The transmission input shaft
is
supported
in the
crankshaft
by a
bearing.
A
sleeve type release bear
ing
is
used
to
operate
the
clutch cover pressure plate.
The release bearing
is
operated
by a
release fork
in
the clutch housing.
The
fork pivots
on a
ball stud
mounted inside
the
housing.
The
release fork
is
actu ated
by a
hydraulic slave cylinder mounted
in the
housing.
The
slave cylinder
is
operated
by a
clutch master cylinder mounted
on the
dash panel.
The
cyl
inder push
rod is
connected
to the
clutch pedal.
The clutch disc
has
cushion springs
in the
disc
hub.
The clutch disc facing
is
riveted
to the hub. The
fac ing
is
made from
a
non-asbestos material.
The
clutch
cover pressure plate
is a
diaphragm type with
a one-
piece spring
and
multiple release fingers.
The
pres sure plate release fingers
are
preset during
manufacture
and are not
adjustable.
A
265 mm
clutch disc
and
cover
are
used
in
models
with
a 3.9L
engine.
A 280 mm
clutch disc
and
cover are used
in
models with
a 5.2L, or
5.9L engine.
A
330 mm
clutch disc
and
cover
are
used
in
models
equipped with
the
optional
5.9L
Cummins diesel
en
gine.
Some diesel models
are
also equipped with
a
clutch pedal interlock switch.
The
switch
is in
circuit
with
the
starter relay
and is
actuated
by the
clutch
pedal
and
push
rod. The
clutch pedal must
be
fully depressed
in
order
to
start
the
engine.
HYDRAULIC LINKAGE COMPONENTS
The hydraulic linkage consists
of a
remote reser
voir, clutch master cylinder, clutch slave cylinder and interconnecting fluid lines.
The clutch master cylinder
is
connected
to the
clutch pedal
and the
slave cylinder
is
connected
to
the clutch release fork.
The
master cylinder
is
mounted
on the
drivers' side
of the
dash panel adja
cent
to the
brake master cylinder.
page
CLUTCH
SERVICE
11
CLUTCH LINKAGE FLUID
The clutch fluid reservoir, master cylinder, slave
cylinder
and
fluid lines
are
prefilled with fluid
at the
factory during assembly operations. The hydraulic system should
not
require additional
fluid under normal circumstances.
In
fact,
the
reser
voir fluid level will actually increase
as
normal clutch wear occurs.
For
this reason,
it is
impor
tant
to
avoid overfilling,
or
removing fluid from
the reservoir. If inspection
or
diagnosis indicates additional fluid
may
be
needed,
use
Mopar brake fluid,
or an
equiv
alent meeting
SAE and DOT
standards J1703
and
DOT
3. Do not use any
other type
of
fluid.
CLUTCH
COMPONENT LUBRICATION
Proper clutch component lubrication
is
important
to satisfactory operation.
The
correct lubricant
and
not overlubricating
are
equally important. Apply rec
ommended lubricant sparingly
to
avoid disc
and
pres sure plate contamination. Clutch
and
transmission components requiring
lu
brication
are:
• pilot bearing
• release lever pivot ball stud
• release lever contact surfaces
• clutch disc
hub
splines
• clutch pedal pivot shaft bore
• clutch pedal bushings
• input shaft splines
• input shaft pilot
hub
• transmission front bearing retainer slide surface Do
not
apply grease
to any
part
of the
clutch
cover,
or
disc.
RECOMMENDED LUBRICANTS
Use Mopar multi-purpose grease
for the
clutch
pedal bushings
and
pivot shaft.
Use
Mopar high tem
perature grease
(or
equivalent)
for all
other lubrica
tion requirements. Apply recommended amounts
and
do
not
over lubricate.
