Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Jeep Cherokee XJ 1988-1989.1993-1995 Approved 1995 XJ Jeep Cherokee 95XJ_6
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J CLUTCH 6-1
CLUTCH
CONTENTS
page page
CLUTCH DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . 3 GENERAL INFORMATION .................. 1
CLUTCH SERVICE . . . . . . . . . . . . . . . . . . . . . . . 10
GENERAL INFORMATION
INDEX
page page
Clutch Components . . . . . . . . . . . . . . . . . . . . . . . . 1 Clutch Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Clutch Linkage Fluid . . . . . . . . . . . . . . . . . . . . . . . . 1 Hydraulic Linkage Components . . . . . . . . . . . . . . . . 1
CLUTCH COMPONENTS The clutch master cylinder push rod is connected to
The clutch mechanism in XJ/YJ models consists of the clutch pedal. The slave cylinder push rod is con-
a single, dry-type disc and a diaphragm style clutch nected to the clutch release fork. The master cylinder
cover. A hydraulic linkage is used to operate the is mounted on the driver side of the dash panel ad-
clutch release bearing and fork. jacent to the brake master cylinder and booster as-
A needle-type pilot bearing supports the transmis- sembly. This positioning is similar for both left and
sion input shaft in the crankshaft. A sleeve type re- right hand drive models.
lease bearing is used to engage and disengage the
clutch cover pressure plate. CLUTCH LINKAGE FLUID
The release bearing is operated by a release fork in The integral clutch master cylinder reservoir, slave
the clutch housing. The fork pivots on a ball stud cylinder and fluid lines are prefilled with fluid prior
mounted in the housing. The release fork is actuated to assembly operations.
by a hydraulic slave cylinder mounted in the hous- The hydraulic system should not require additional
ing. The slave cylinder is operated by a clutch master fluid under normal circumstances. In fact, the reser-
cylinder mounted on the dash panel. The cylinder voir fluid level will actually increase as normal
push rod is connected to the clutch pedal. clutch wear occurs. For this reason, it is impor-
The clutch disc has cushion springs in the disc hub.
tant to avoid overfilling, or removing fluid from
The clutch disc facing is riveted to the hub. The fac-
the reservoir. This will cause clutch release
ing is made from a non-asbestos material. The clutch
problems.
cover pressure plate is a diaphragm type with a one-
If inspection or diagnosis indicates additional fluid
piece spring and multiple release fingers. The pres-
sure plate release fingers are preset during may be needed, use Mopar brake fluid, or an equiv-
manufacture and are not adjustable. alent meeting standards SAE J1703 and DOT 3. Do
not use any other type of fluid.
HYDRAULIC LINKAGE COMPONENTS
The hydraulic linkage consists of a clutch master
cylinder with integral reservoir, a clutch slave cylin-
der and an interconnecting fluid line.
6-2 CLUTCH J
CLUTCH OPERATION mitted to the slave cylinder through a connecting
Leverage, clamping force, and friction are what line. In turn, the slave cylinder operates the clutch
make the clutch work. The disc serves as the friction release lever.
element and a diaphragm spring and pressure plate The clutch release bearing is mounted on the
provide the clamping force. The clutch pedal, hydrau- transmission front bearing retainer. The bearing is
lic linkage, release lever and bearing provide the le- attached to the release lever, which moves the bear-
verage. ing into contact with the clutch cover diaphragm
The clutch cover assembly clamps the disc against spring.
the flywheel. The assembly consists of the cover, dia- Slave cylinder force causes the release lever to
phragm spring, pressure plate, and fulcrum compo- move the release bearing into contact with the dia-
nents. The pressure plate clamps the clutch disc phragm spring. As additional force is applied, the
against the flywheel and the spring provides the bearing presses the diaphragm spring fingers inward
clamping force. on the fulcrums. This action moves the pressure
The clutch disc friction material is riveted to the plate rearward relieving clamp force on the disc. The
disc hub. The hub bore is splined for installation on clutch disc is disengaged and freewheeling at this
the transmission input shaft. The hub splines con-
point.
nect the disc to the transmission.
The process of clutch re-engagement, is simply the
The clutch linkage uses hydraulic pressure to oper-
reverse of what occurs during disengagement. Releas-
ate the clutch. The clutch master cylinder push rod is
ing pedal pressure removes clutch linkage pressure.
connected to the clutch pedal and the slave cylinder
push rod is connected to the release lever in the The release bearing moves away from the diaphragm
clutch housing. spring which allows the pressure plate to exert
Depressing the clutch pedal develops fluid pressure clamping force on the clutch disc.
in the clutch master cylinder. This pressure is trans-
J CLUTCH DIAGNOSIS 6-3
CLUTCH DIAGNOSIS
INDEX
page page
Clutch Contamination . . . . . . .. . . . . . . . . . . . . . . . 3 Flywheel Runout . . . . . . . . . . . . . . . .... . . . . . . . . 3
Clutch Cover and Disc Runout . . . . . . . . . . . . . . . . 3 General Diagnosis Information . . . . .... . . . . . . . . 3
Clutch Housing Misalignment .. . . . . . . . . . . . . . . . 4 Inspection and Diagnosis Charts . . . .... . . . . . . . . 4
Clutch Misalignment . . . . . . . .. . . . . . . . . . . . . . . . 3 Installation Methods and Parts Usage ... . . . . . . . . 4
GENERAL DIAGNOSIS INFORMATION Misalignment caused by excessive runout or warpage
Unless the cause of a clutch problem is obvious, ac- of any clutch component will cause grab, chatter and
curate problem diagnosis will usually require a road improper clutch release.
test to confirm a problem. Component inspection will
then be required to determine the actual problem FLYWHEEL RUNOUT
cause. Check flywheel runout whenever misalignment is
suspected. Flywheel runout should not exceed 0.08
During a road test, drive the vehicle at normal
mm (0.003 in.). Measure runout at the outer edge of
speeds. Shift the transmission through all gear
the flywheel face with a dial indicator. Mount the in-
ranges and observe clutch action. If chatter, grab,
dicator on a stud installed in place of one of the fly-
slip, or improper release is experienced, remove and
wheel bolts.
inspect the clutch components. However, if the prob- Common causes of runout are:
lem is noise or hard shifting, further diagnosis may ◦ Jabse Service Manual Search 2023 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo