clutches basic purpose used to disengage engine from input shaft flywheel –bolted to crankshaft...
TRANSCRIPT
![Page 1: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/1.jpg)
Clutches
![Page 2: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/2.jpg)
Basic purpose
• Used to disengage engine from input shaft
• Flywheel– Bolted to crankshaft– Provides surface for clutch disc to work on
• Clutch disc– Splined to transmission input shaft– Fits between flywheel and pressure plate
![Page 3: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/3.jpg)
Basic purpose
• Pressure plate– Bolted to flywheel– Applies squeezing pressure to disc– Acted on by throw out bearing
![Page 4: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/4.jpg)
Flywheel
![Page 5: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/5.jpg)
Flywheel
• Acts as engine balancer– Works with crank balancer to smooth out firing
pulses– Some will be balanced to engine
• Adds inertia to engine rotation• Works as heat sink for clutch• Ring gear for starter engagement• Some vehicles have dual mass flywheel
![Page 6: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/6.jpg)
Flywheel service• Visually inspect for hot spots, grooves,
scoring and cracks
• Check with dial indicator for runout and crank end play
• Most flywheels can (should) be resurfaced– Must remove dowel pins
• Inspect ring gear
![Page 7: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/7.jpg)
Flywheel service• Flywheel should be marked before
removing to maintain balance
• On Front wheel drive cars a lot of Flywheels are used for Ignition timing marks. They should be marked before removing. Some will only bolt on one way don’t take the chance MARK IT
![Page 8: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/8.jpg)
Clutch disc
![Page 9: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/9.jpg)
Clutch disc
• Friction material disc splined to input shaft
• Friction material may contain ASBESTOS
• Friction material can be bonded or riveted
• Friction is attached to wave springs
• Most have torsional dampener springs
• Normal wearing component
• Normally a worn out disc will cause slipping
![Page 10: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/10.jpg)
Clutch disc service
• Inspect for wear similar to brake pads
• Common to have loose or broken springs
• Common failure due to oil contamination– Must find cause BEFORE repair
• Normally purchased in kit containing pressure plate, disc, throw out bearing
![Page 11: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/11.jpg)
Clutch disc service• Clutch disc will normally have a flywheel
side
• Disc must be centered with clutch alignment tool before pressure plate bolted down
• Make sure new disc fits on input shaft of the transmission before you install it
![Page 12: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/12.jpg)
Pressure plate
![Page 13: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/13.jpg)
Pressure plate
• Provides clamping pressure to disc– Works like spring loaded clamp
• Bolted to _________________
• Can use Belleville spring acted on by Throw Out bearing
• Can use coil springs and levers acted on by Throw Out bearing
![Page 14: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/14.jpg)
Pressure plate service
• Mark relation to flywheel if reused
• Remove bolts slowly in criss-cross pattern
• Inspect fingers for parallelism, cracking or uneven wear
• Inspect friction surface for hot spots, cracks etc and with straight edge for warpage
• Must be torqued to specs and in sequence
• Uses hard bolts
![Page 15: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/15.jpg)
Release/ throw out bearing
![Page 16: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/16.jpg)
Release/ throw out bearing
• Acted on by clutch fork - acting on pressure plate
• Moves toward flywheel when pedal pushed
• Slides on front portion of transmission called bearing retainer
• Normally not in contact with pressure plate until pedal pushed
![Page 17: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/17.jpg)
Release bearing service• Very common failure - isolated by lightly
applying clutch and listening
• Inspect for looseness or roughness
• Most are sealed but some were lubeable
• Clutch fork must be lubed at pivot point and bearing contact points
• Bearing retainer and input shaft should be lubed
• Clutch fork must be secured at the pivot point
![Page 18: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/18.jpg)
Pilot bearing / bushing
• Used on some cars
• Supports front of transmission input shaft
• Can be needle bearing or bronze bushing
• May be part of clutch kit
![Page 19: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/19.jpg)
Pilot servicing
• Should always be changed with clutch
• Can be isolated by applying clutch in gear
• Special pullers may be used for removal– Can be removed with grease
• Should be lightly lubed on installation
![Page 20: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/20.jpg)
Clutch linkage
• Can be operated by cable, rods or hydraulics
• May be automatic or manually adjusted
• Hydraulic will have a master and slave cylinder– Will use brake fluid for hydraulic action– Will need bleeding with repairs
![Page 21: Clutches Basic purpose Used to disengage engine from input shaft Flywheel –Bolted to crankshaft –Provides surface for clutch disc to work on Clutch disc](https://reader035.vdocument.in/reader035/viewer/2022081422/56649f515503460f94c73d62/html5/thumbnails/21.jpg)
The End