Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Jeep Cherokee XJ 1997.1999-2001 Approved 2000 XJ Jeep Cherokee exj_6

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XJ                                                                                                                             CLUTCH          6-1



                                                                  CLUTCH
                                                        TABLE OF CONTENTS

                                                                    page                                                                       page

DESCRIPTION AND OPERATION                                                      CLUTCH FLYWHEEL RUNOUT . . . . . . . . . . . . . . . 6
  CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1     CLUTCH COVER AND DISC RUNOUT . . . . . . . . . 7
  FLYWHEEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2       CLUTCH DIAGNOSIS CHARTS . . . . . . . . . . . . . . . 7
  CLUTCH DISC. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2        SERVICE PROCEDURES
  CLUTCH PRESSURE PLATE . . . . . . . . . . . . . . . . . 2                    CLUTCH COMPONENT LUBRICATION . . . . . . . . . 9
  CLUTCH RELEASE BEARING . . . . . . . . . . . . . . . . 3                     CLUTCH LINKAGE FLUID . . . . . . . . . . . . . . . . . . . 9
  HYDRAULIC CLUTCH LINKAGE . . . . . . . . . . . . . . 4                       CLUTCH FLUID LEVEL . . . . . . . . . . . . . . . . . . . . 10
DIAGNOSIS AND TESTING                                                          FLYWHEEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
  SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . 4                REMOVAL AND INSTALLATION
  INSTALLATION METHODS AND PARTS                                               CLUTCH COVER AND DISC . . . . . . . . . . . . . . . . 11
    USAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4    RELEASE BEARING . . . . . . . . . . . . . . . . . . . . . . 12
  CLUTCH DIAGNOSTIC INFORMATION . . . . . . . . . 4                            PILOT BEARING . . . . . . . . . . . . . . . . . . . . . . . . . 12
  CLUTCH CONTAMINATION . . . . . . . . . . . . . . . . . . 6                   CLUTCH HOUSING . . . . . . . . . . . . . . . . . . . . . . . 13
  IMPROPER CLUTCH RELEASE OR                                                   CLUTCH HYDRAULIC LINKAGE . . . . . . . . . . . . . 13
    ENGAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . 6          SPECIFICATIONS
  CLUTCH MISALIGNMENT. . . . . . . . . . . . . . . . . . . 6                   TORQUE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
  CLUTCH HOUSING MISALIGNMENT . . . . . . . . . . 6

DESCRIPTION AND OPERATION
CLUTCH
DESCRIPTION
  The clutch mechanism consists of a flywheel, a sin-
gle, dry-type disc, and a diaphragm style clutch cover
(Fig. 1). A hydraulic linkage is used to operate the
clutch release bearing and fork. The flywheel is
bolted to the rear flange of the crankshaft. The
clutch pressure plate is bolted to the flywheel with
the clutch disc located between these two compo-
nents. The clutch system provides the mechanical,
but still easily detachable, link between the engine
and the transmission. The system is designed to
ensure that the full torque output of the engine is
transfered to the transmission while isolating the
transmission from the engine firing pulses to mini-
mize concerns such as gear rattle.

OPERATION
   Leverage, clamping force, and friction are what
make the clutch work. The disc serves as the friction
element and a diaphragm spring and pressure plate                                                Fig. 1 Engine Powerflow
provide the clamping force. The clutch pedal, hydrau-
lic linkage, release lever and bearing provide the
leverage.
6-2         CLUTCH                                                                                           XJ
DESCRIPTION AND OPERATION (Continued)
  The clutch master cylinder push rod is connected
to the clutch pedal. When the clutch pedal is
depressed, the slave cylinder is operated by the
clutch master cylinder mounted on the dash panel.
The release fork is actuated by the hydraulic slave
cylinder mounted on the transmission housing. The
release bearing is operated by a release fork pivoting
on a ball stud mounted in the transmission housing.
The release bearing then depresses the pressure
plate spring fingers, thereby releasing pressure on
the clutch disc and allowing the engine crankshaft to
spin independently of the transmission input shaft
(Fig. 2).

                                                                            Fig. 3 Flywheel
                                                         1 

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