Table of Contents
Advertisement
TJ
GENERAL INFORMATION
CLUTCH COMPONENTS . . . . . . . . . . . . . . . . . . . 1
INSTALLATION METHODS AND PARTS
USAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION AND OPERATION
CLUTCH OPERATION . . . . . . . . . . . . . . . . . . . . . 1
DIAGNOSIS AND TESTING
DIAGNOSTIC INFORMATION . . . . . . . . . . . . . . . 2
SERVICE PROCEDURES
CLUTCH COMPONENT LUBRICATION . . . . . . . . 9
CLUTCH FLUID LEVEL . . . . . . . . . . . . . . . . . . . . 9
GENERAL INFORMATION
CLUTCH COMPONENTS
The clutch mechanism in TJ models consists of a
single, dry-type disc and a diaphragm style clutch
cover. A hydraulic linkage is used to operate the
clutch release bearing and fork.
A needle-type pilot bearing supports the transmis-
sion input shaft in the crankshaft. A conventional
release bearing is used to engage and disengage 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 in the housing. The release fork is actuated
by a hydraulic slave cylinder mounted on the hous-
ing. The slave cylinder is operated by a clutch master
cylinder mounted on the dash panel. The cylinder
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
facing 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
pressure plate release fingers are preset during man-
ufacture and are not adjustable.
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.
The clutch master cylinder push rod is connected
to the clutch pedal. The slave cylinder push rod is
connected to the clutch release fork. The master cyl-
inder is mounted on the driver side of the dash panel
adjacent to the brake master cylinder and booster
CLUTCH
CONTENTS
page
CLUTCH LINKAGE FLUID . . . . . . . . . . . . . . . . . . 9
FLYWHEEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
REMOVAL AND INSTALLATION
CLUTCH COVER AND DISC . . . . . . . . . . . . . . . 10
CLUTCH HOUSING . . . . . . . . . . . . . . . . . . . . . . 12
CLUTCH HYDRAULIC LINKAGE . . . . . . . . . . . . 12
CLUTCH PEDAL . . . . . . . . . . . . . . . . . . . . . . . . 13
PILOT BEARING . . . . . . . . . . . . . . . . . . . . . . . . 11
RELEASE BEARING . . . . . . . . . . . . . . . . . . . . . 11
TORQUE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
assembly. This positioning is similar for both left and
right hand drive models.
INSTALLATION METHODS AND PARTS USAGE
Distortion of clutch components during installation
and the use of non-standard components are common
causes of clutch malfunction.
Improper clutch cover bolt tightening can distort
the cover. The usual result is clutch grab, chatter
and rapid wear. Tighten the cover bolts as described
in Removal and Installation section.
An improperly seated flywheel and/or clutch hous-
ing are additional causes of clutch failure. Improper
seating will produce misalignment and additional
clutch problems.
The use of non-standard or low quality parts will
also lead to problems and wear. Use recommended
factory quality parts to avoid comebacks.
A cocked pilot bearing is another cause of clutch
noise, drag, hard shifting, and rapid bearing wear.
Always use an alignment tool to install a new bear-
ing. This practice helps avoid cocking the bearing
during installation.
DESCRIPTION AND OPERATION
CLUTCH 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 provide the
clamping force. The clutch pedal, hydraulic linkage,
release lever and bearing provide the leverage.
The clutch cover assembly clamps the disc against
the flywheel. The assembly consists of the cover, dia-
CLUTCH
6 - 1
page
Advertisement
Chapters
Table of Contents
