ATASA 5 Clutches - Grafton School District · ATASA 5 th Clutches Release Crease Pilot Concentric...
Transcript of ATASA 5 Clutches - Grafton School District · ATASA 5 th Clutches Release Crease Pilot Concentric...
ATASA 5 th Study Guide Chapter 36 Pages 10711091 Clutches 74 Points
ATASA 5 th Clutches Be Certain to Read the Summary
1. The _______ provides a mechanical coupling between the engine’s ____________ & the transmission’s __________ shaft. The clutch allows the engine to _______ while the vehicle is stopped and allows for easy shifting between gears while the engine is running.
Clutch, Crankshaft, Input Clutch, Camshaft, Output Clutch, Flywheel, Input
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2. The _____________ & the ___________ ___________ are the driving members of the clutch. (Inputs)
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3. The driven member (output) of the clutch is the clutch _______, also called the __________ _______.
Clutch Disc a.k.a. Friction Disc
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4. With the clutch pedal _______________, the driving members are ______________ from the driven.
Depressed, Disengaged Depressed, Dejected Depressed, Engaged
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5. With the clutch pedal ________________, all of the members are engaged & turn at the same speed.
Released = Engaged
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6. Some older clutch discs contained _________________, which is a known carcinogen. (cancer causer)
Sulfur Asbestos Uranium
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7. The flywheel holds the starter _______ _______, provides inertia & dampens ___________ vibration.
Ding Gear, Engine Ring Gear, Engine Pinion Gear, Engine
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8. A bore in the center of the flywheel & crankshaft hold the __________ _________ or bearing.
Pilot Bushing
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9. The pilot bushing or bearing supports the front of the transmission __________ shaft & maintains alignment of the crankshaft, clutch components, and the pilot shaft.
Counter Output Input
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10. A ________ ________ flywheel reduces vibrations & allows for smoother shifting with 2 rotating plates connected together by a spring and damper system. Some may have a torque limiting feature.
Dual Mass Dual Credit Dual Certification
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11. Clutch disc friction facings can be either _______ or _________ of cotton, brass, rope, wire, paperbased products, and graphite. Heatresistant asbestos has been eliminated from use.
Molded or Woven
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12. Grooves across the face of the friction disc provide for clean ____________________ from the flywheel and pressure plate.
Disengagement Disagreement Disenfranchisement
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13. Clutch disc facing material is ______ to the wave or __________ springs
Riveted, Cushioning Nailed, Cushioning Screwed, Torsional
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14. The __________ springs of the disc are fastened to the steel hub which is splined to the input shaft.
Cushioning Dampening Retaining
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15. The wave springs eliminate ______________ when the clutch is engaged & also reduce sticking.
Tatter Chatter Shatter
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16. _________________ coil springs arranged axially on the disc help absorb crankshaft vibration, abrupt engagement, & driveline shock.
Torsional Retraction Cushioning
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17. The __________ bearing supports the front end of the transmission input shaft or pilot shaft.
Input Release Pilot
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18. The _____________ __________ assembly must be able to tightly squeeze the disc against the flywheel & must be able to move away from the flywheel so the disc can spin down & stop rotating.
Pressure Plate Dessert Plate Collector Plate
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19. Pressure plates can use either ______ springs or a ___________ spring to tightly hold the disc against the machined surface of the flywheel.
Coil or Diaphragm
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20. The clutch cover assembly employs 1st class ________ action to move the pressure plate away from the flywheel as the clutch release bearing is forced towards the flywheel.
Wedge Lever Pulley
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21. A ____________ pressure plate uses weights that increase holding force of the clutch as engine speed increases. Multiple discs & plates are used to increase clutch capacity.
Centrifugal Ball & Ramp Pneumatic
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22. The diaphragm pressure plate uses a _____________ spring that works in the same manner as the bottom of an oil can. The metal yields when pressure is applied to it & flexes back when released.
Belleville ®
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23. The diaphragm pressure plate/clutch cover assembly is preferred because of its COMPACTNESS, light weight, FEWER moving parts, less operator PEDAL effort, its balance, & its long life.
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24. The clutch release bearing is also called the ___________ bearing.
Pilot Throw Out Precision Insert
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25. The throwout bearing moves the _______ _______ levers or the diaphragm through the engagement & disengagement processes.
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26. The clutch release bearing is mounted on & slides on a hub that is often the transmission _________ shaft bearing retainer.
Input Counter Output
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27. The throwout bearing is moved by the _________ _______ which is either a 1st or 2nd class lever.
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28. Anytime the release bearing ______________ the release levers or diaphragm, it spins at engine rpm.
Contacts or Touches
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29. The clutch fork pivots on a _______ _______. It is moved in to action by the clutch pedal & linkage.
Ball Diamond Ball Joint Ball Stud
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30. Clutch linkage can be either __________ (cable or shaft & levers) or ___________________.
Mechanical or Hydraulic Mechanical or Pneumatic Mechanical or Vacuum
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Mechanical or Hydraulic Mechanical or Pneumatic Mechanical or Vacuum
ATASA 5 th Clutches 30. Clutch linkage can be either __________ (cable or shaft & levers)
or ___________________.
31. Clutch ___________ are the most common type of linkage with the advantages of flexibility, simplicity in design, they are lightweight and take up very little space under the hood & dash.
Cabanas Fables Cables
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32. Some cable linkages are ________________________ through the use of a toothed, ratcheting pawl.
SelfAdjusting
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33. Hydraulic clutch linkage uses a clutch ____________ cylinder and an apply _________ cylinder connected with tubing that transmits force & pressure using ordinary brake fluid.
Master
Slave
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34. Hydraulic clutches have the same concerns & symptoms as brake systems if ______ is not bled out.
Fluid Air ATF
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34. Clutch linkage adjustment is done to make sure that the __________ bearing (throwout bearing) does not touch the pressure plate release levers when the clutch is engaged.
Release Crease Pilot
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35. An internal ______________ slave cylinder is a combination of the slave & the throwout bearing.
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Release Crease Pilot
Concentric Slave Cylinders combine releaser and slave cylinders in one compact
unit and outclass mechanical and semihydraulic systems, with clear advantages in
design, assembly, maintenance and operation.
36. Clutch linkage adjustment is done to make sure that the _______ bearing (throwout bearing) does not touch the pressure plate release levers when the clutch is engaged.
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37. As the friction disc becomes worn & thinner, the springs move ____________ the throwout bearing.
Less clearance between the levers & release bearing results in less pedal ______ ________ or play.
Toward & Free Travel
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38. Free travel is the ______________ the clutch pedal moves before the release bearing contacts the release levers or diaphragm spring of the pressure plate.
Direction Distance Volume
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39. A threaded fastener at the clutch fork is often used to adjust __________ ________. This is measured with a ruler at the pedal and adjusted to manufacturers’ specs. (usually about ¾”)
Free Travel
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40. Too little pedal free play results in clutch ______________. Too much free play clashes gears during shifting. Shifting may then only be possible with the engine shut off!
Slippage
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41. Always check free travel _______ diagnosing any clutch problems. A clutch worn too thin can no longer have it’s pedal free play properly adjusted.
After During Before
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42. Clutch slippage occurs when the engine _____________ without generating any increase in torque applied to the driving wheels. Engine speeds up but vehicle speed remains the same.
Accelerates Decelerates Idles
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44. Clutch slippage can also be caused by _____soaked or very worn friction materials, weak or broken diaphragm spring, or a warped pressure plate due to improper torquing during reassembly.
Fluid Oil Water
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45. Clutch ________ and ____________ happens if the disc isn’t completely released when the pedal is fully depressed. Clutch drag causes gear clash when trying to shift & maybe hard starting…
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Drag & Binding
46. A _____________ time that is over 5 seconds is proof of clutch drag or binding of the disc on the input shaft splines.
Spindown Reverberation Volumetric
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47. A binding or seized _______ bearing can cause the input shaft to rotate at all times simulating a clutch dragging or binding problem.
Starter Pilot Release
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48. Clutch ______________ is shaking or shuddering felt in the vehicle as the clutch is engaged.
Chatter Reverberation Chuggle
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49. Clutch chatter is caused by ____________ contamination of the friction surfaces.
Fluid Asbestos Heat
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50. What 3 or 4 vehicle fluids could leak onto the clutch disc?
hmmm…2 from the engine & 2 from the drive train…
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Clutch aligning tool used to center the friction disc with the pilot bushing during reassembly
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51. Pedal _______ can result from a flywheel with excessive runout, a misaligned bell housing or warped clutch disc or pressure plate.
Pulsation Chatter Drop to the Floor
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52. Clutch vibrations are different than pedal pulsations & can be felt _____________ the vehicle.
Throughout Underneath On top of
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53. Paying attention to __________ (squeals, howls, grinding) & when they happen helps with diagnosis.
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54. A throwout bearing typically makes noise only when the pedal is __________ & goes away when the clutch pedal is ___________. (the trans input shaft bearing behaves exactly opposite)
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55. __________ a hydraulic clutch may be similar to brake bleeding… Be sure to check OEM guidelines, just to be sure.
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