CLUTCH SERVICE
Teknik Kendaraan RinganSemester 3 th Class XI
Kompetensi Kejuruan
SK-KD 7TH
DIAGRAM ALUR PENCAPAIAN KOMPETENSI
Drive Train
Mechanism changes energy generated by a machine called the "Power Train"
This mechanism consists of:
Clutch (clutch) Transmission Propeller shaft Differential Axle & Drive
shaft
Clutch
Position: Between the engine and transmission Function: To connect and disconnect cycles engine to the transmission
Terms: 1.Can connected from engine to the transmission with smooth
2.Can move the engine to power transmission without slip
3.Can terminate the relationship with the quick and perfect
Cluct systems are used to disengage the engine from road
When the clucth pedal is depressed, the clucth is disengaged from the engine
When the clutch is engaged the engine, the engine power will transfer through the clucth to the road
SYSTEM COMPONENTS
Flywheel: Transfer engine power the clucthInput shaft: transfers power from clucth to
the tranmissionClucth Disc : spilne to input sahft, transfer
power from engine the input shaftPressure plat assembly : Spring pressure
tighttly holds the clucth to the flywheel
Release Bearing : Connected through linkage to the clucth pedal. Provides a way for the pressure plate to release pressure on the clucth
Clucth Fork : Slide the release bearing into and away from the pressure plat assembly
Clucth Lingkage. Allows the driver to operate the clucth fork
Clucth Housing : Encloses the clucth assembly
Clutches operation
8
Bolted to Crank
(friction disk) splined to transmissionInput shaft
(throw-out bearingT/O bearing) allowsto push on rotatingclutch fingers
Bolted to flywheel - Applies the spring force to clamp thefriction disk to the flywheel
(clutch fork) pushes T/O bearing to release rotating clutch
Pilot bushing or bearing in centerof flywheel or crankshaft, supportsthe end of input shaft
With you foot off of the pedal, the pressute plat hold the clucth against the flywheel, alloing power to travel through the clucth to the input shaft of the transmission
With the clucth disesaged, the pressure releases it’s clamp on the clucth disc, which interrupts the power flow from engine
Clutches
11
Flywheel, Pressure plate, spring, end clucth cover are revolving. Clucth disc and clucth shaft are stopped to pressure plat Disengage
Pressure plate engage- seizes clucth disc and entire unit revolves
Fly Wheels
Mounted on the rear of crankshaftControl speed fluctuations of the crankshaftAllows a method of starting the engineFriction surface for the clucthCast iron or cold rolled steel
Transmission input shaft
Extends from the rear of engine crankshaft to the insade of the transmission case
Splined area where the clucth hub ridesPilot area support front of input shaft in end
of crankshaftTransmission front bearing supports the end
of the input shaftAlso called the clucth shaft
Clucth Disc
Also called the friction discLocated between the flywheel and pressure
platTransmits power from engine to the input
shaftMade up of an outer disc assembly and
central hubContains many grooves cut across surface
for heart dissipation, removal of dust and dirt, and to break and vacum
Construction of the Clutch
16
Splines to input shaftOf transmission
Clutch Disk orFriction Disk
Outer disc assembly
Thin steel sandwiched between friction material or friction facing
Friction material is bonded or rivetedFriction material is devaiced into segments
for even distributionSpring steel between the facings help absorp
the shock of engagement
Clucth Disc Facings
Clucth Disc FacingsLike brake lining, asbeston was trasitionally
used because of excellent coefficient of friction, heat dissipation. And low cost
Fedeal low as banned the manufacture of asbeston containing clucth facings after Agustus of 1992
Asbeston is replaced with fiberglass and aramid nonmetallic compounds of metallic friction facings, using various mixtures of powdered iron copper, graphite, and ceramic
0,015 or less above rivets is considered worn out
When sectional lines come close to disappering is worn
Friction disks
Often made of asbestos
Must be put in only one way Usually marked Clutch won’t
release if wrong
2012/2001
Friction disks
Cushion springs Waved metal between clutch half's Dampen clutch engagement
21
Friction disks
Torsional springs Can be spring or rubber Dampen power impulses from crankshaft
2212/2001
Torsional Springs
23
Has pins to limit amount of twist.Springs try to keep it centered between pins.
Springs sometimes get weak and start rattling or fall out
Disc clutchFunction: • Friction facing the field
to play power forward from the engine to the transmission
• Cushion plate to soften when the clutch related
• Torsion damper for muted surprise when clutch related
Friction disks
Torsional springs Can be spring or rubber Dampen power impulses from crankshaft
2512/2001
Hub flange
Splined hub engage the splines on the transmission input shaft
Made from cast ironHub flange and outer disc are riveted
together with”stop pins”
Types of Clutches (pressure plates)
Coil spring 9 spring 12 spring
3 fingers for T/O bearing to push on
Clutch cover tipe coil spring
Clutch cover type coil spring Advantages: • The emphasis on strong plate clutch
Disadvantages: • Energy to pressure plate clutch weight • Construction complicated, so expensive price
Clutch cover type diagpragm
Diaphragm clutch cover model
Advantages: • Light energy emphasis • Emphasis clutch plate more evenly • Pedal power is not reduced by the style centrifugal
Disadvantages•The emphasis of the plate clutch smaller
Mechanism of mechanical clutch
Free play
Freeplay is the distance between the pedal and diaprahgma cushion liberator
Mechanism of hydraulic clutch
This type of movement on the clutch pedal to be changed by pressure hydraulic master cylinder which is then forwarded to the release fork through the release cylinder
Master Cylinder
Function: To generate pressure hydrolic
SOME ONE READ
Clutch Release Cylinder
Function: To forward the power of the master cylinder push release fork
Some are adjustablefor free-play and
some not
Automatic clutch (torque converter)
Note: Only used on vehicles equipped with automatic transmission
end