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DESCRIPTION AND OPERATION
CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FLYWHEEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CLUTCH DISC. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CLUTCH PRESSURE PLATE . . . . . . . . . . . . . . . . . 2
CLUTCH RELEASE BEARING . . . . . . . . . . . . . . . . 3
HYDRAULIC CLUTCH LINKAGE . . . . . . . . . . . . . . 4
DIAGNOSIS AND TESTING
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION METHODS AND PARTS
USAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
CLUTCH DIAGNOSTIC INFORMATION . . . . . . . . . 4
CLUTCH CONTAMINATION . . . . . . . . . . . . . . . . . . 6
IMPROPER CLUTCH RELEASE OR
ENGAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . 6
CLUTCH MISALIGNMENT. . . . . . . . . . . . . . . . . . . 6
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
provide the clamping force. The clutch pedal, hydrau-
lic linkage, release lever and bearing provide the
leverage.
CLUTCH
TABLE OF CONTENTS
page
CLUTCH FLYWHEEL RUNOUT . . . . . . . . . . . . . . . 6
CLUTCH COVER AND DISC RUNOUT . . . . . . . . . 7
CLUTCH DIAGNOSIS CHARTS . . . . . . . . . . . . . . . 7
SERVICE PROCEDURES
CLUTCH COMPONENT LUBRICATION . . . . . . . . . 9
CLUTCH LINKAGE FLUID . . . . . . . . . . . . . . . . . . . 9
CLUTCH FLUID LEVEL . . . . . . . . . . . . . . . . . . . . 10
FLYWHEEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
REMOVAL AND INSTALLATION
CLUTCH COVER AND DISC . . . . . . . . . . . . . . . . 11
RELEASE BEARING . . . . . . . . . . . . . . . . . . . . . . 12
PILOT BEARING . . . . . . . . . . . . . . . . . . . . . . . . . 12
CLUTCH HOUSING . . . . . . . . . . . . . . . . . . . . . . . 13
CLUTCH HYDRAULIC LINKAGE . . . . . . . . . . . . . 13
SPECIFICATIONS
TORQUE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
CLUTCH
Fig. 1 Engine Powerflow
6 - 1
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