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