Slide 1: Automobiles Topic My first Presentation Don Bosco Auto firstname.lastname@example.org Slide 2: CLUTCH Slide 3: MODULE : TRUCK CLUTCH Slide 4: Learning outcome This Module Provides you with the skills
To repair Truck clutch.
To test and identify faults in the Truck clutch. Slide 5: Outcome On Completion of this module you should
be able to:
Identify clutch assemblies and explain single plate dry clutch operation.
Identify faults in clutch.
Remove , replace and repair clutch. Slide 6: CLUTCH LOCATION,
FUNCTION AND TYPES Slide 7: Location Located between the Engine and Gear Box. ENGINE FRONT WHEEL CLUTCH TRANSMISSION UNIVEASAL JOINT GEAR REAR WHEEL Slide 8: Why is CLUTCH Required? IC engines develop low torque at starting speed and as the speed increases, develop enough torque to pick up the load. Slide 9: E.g. if the power from a running engine is transmitted to the drive wheels when the truck is at stand still
The truck will jump out if the power is too large.
The engine will stop or stall if the power is too small. Slide 10: To connect and disconnect the Power from Engine to Gearbox. FUNCTION Slide 11: Truck Clutches use SINGLE PLATE DRY CLUTCH which is Finger Type Types of clutch Slide 12: CLUTCH CONSTRUCTION AND
WORKING Slide 13: MAIN PARTS of CLUTCH Assembly
Consist of flywheel,
Pressure plate, Pressure Pressure Springs Pressure plate Driven by Clutch cover Flywheel Release lever Release
Levers Single plate dry clutch Slide 14: Driven members
Consist of Clutch plate which slides on the splines of clutch shaft Clutch Plate Splines of clutch shaft Single plate dry clutch Slide 15: Operating members
Consist of foot pedal, linkage, release bearing, release levers and pressure springs Pressure Springs Release Bearing Linkage Release
Levers Foot Pedal Single plate dry clutch Slide 16: Cushion Springs - Are mounted on the clutch hub, these are wavy springs. This provision is made to ensure engaging of clutch without any sound or jerk. Cushion Spring Construction of clutch plate Slide 17: Facing - Clutch facings made of fiber asbestos are riveted on both side of the cushion spring for correct operation and functioning of the modern clutch assembly. Facing Construction of clutch plate Slide 18: Torsion Springs - To absorb vibrations when the clutch is engaged or disengaged
Hub flange - To accommodate torsion spring
Splined Hub - Can slide on primary shaft splines Torsion springs Hub flange Hub Construction of clutch plate Slide 19: CLUTCH OPERATING
MECHANISM Slide 20: Clutch release lever should have adequate clearance in clutch housing for actuation.
It should not slip at high torque
It should be able to damp torsional vibrations of crank shaft Clutch Actuation System Requirements Slide 21: MECHANICAL TYPE Clutch Operation CLUTCH COVER E-RING CLUTCH RELEASE LEVER CLUTCH PEDAL CLUTCH RELEASE CAGLE RELEASE FORK Slide 22: Clutch Operation HYDRAULIC TYPE Slide 23: Adjustment should be perform when a pedal play is not correct
Or when the clutch does not engage or disengage properly.
Often pedal play can be increased or decreased by turning
Treaded fastener located either under
the dash at the clutch pedal or where
the linkage attaches to the clutch fork Clutch pedal free play Adjustment Slide 24: Retracting spring Equalizer shaft Pedal-to-equalizer rod Release lever Pedal Over-center spring Retainer Link Bracket and bumper Release rod Clutch pedal free play adjustment Slide 25: Don Bosco Auto