Deck 14: Clutches

Question 1

What is recommended advice for selecting the appropriate starting gear?

A) use the lowest gear ratio to start moving
B) select a gear ratio that allows you to start moving with the engine at idle rpm
C) select the highest gear in deep reduction range
D) use the lowest gear in high range

Answer 1

B

Question 2

Technician A says that most vocational trucks use rigid friction discs.Technician B says that coaxial spring friction discs are better at absorbing torsional shock loads.Who is right?

A) Technician A
B) Technician B
C) Both Technicians A and B
D) Neither Technician A nor B

Answer 2

B

Question 3

Technician A says that clutch shaft pilot bearings should be replaced each time a clutch pack is replaced.Technician B says that the pilot bearing should always be inspected when a clutch pack is replaced.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Answer 3

C

Question 4

Which of the following dimensions is within the specified clutch pedal freeplay dimension measured at the pedal?

A) 1 inch
B) 1 3/4 inches
C) 2 1/4 inches
D) 2 3/4 inches

Question 5

Which of the following could cause clutch hang-up?

A) insufficient free travel
B) misaligned intermediate plate drive pins
C) seized throw-out bearing
D) stretched clutch linkage rod

Question 6

What is the function of coaxial springs in a clutch friction plate?

A) dampening of driveline torsionals
B) dampening of engine torsionals
C) reducing clutch chatter
D) all of the above

Question 7

Which of the following driving practices can cause abnormal wear to clutch components?

A) standing starts in high gear ratios
B) riding the clutch pedal
C) using the clutch to hold a truck on an incline
D) all of the above

Question 8

How is the intermediate plate driven in a two-plate clutch assembly?

A) notches around the circumference that engage to flywheel drive pins
B) external tangs that fit into notches in the clutch cover
C) both A and B
D) neither A nor B

Question 9

Where should the clutch pedal be positioned while the internal adjusting ring of a pull-type clutch is being turned during a clutch adjustment?

A) fully depressed
B) fully released
C) depressed as far as clutch brake engagement
D) depressed far enough to remove the free play

Question 10

As clutch friction facings wear on a truck pull-type clutch,how is clutch pedal free travel affected?

A) decreases
B) increases
C) unaffected

Question 11

Clutch facing wear has resulted in zero clutch pedal free travel in a truck equipped with a manually adjustable,pull-type clutch.Which of the following is the recommended method of restoring clutch pedal free travel to specification?

A) move the internal adjusting ring 6 to 8 notches clockwise
B) move the internal adjuster ring 6 to 8 notches counterclockwise
C) lengthen the external linkage rod 1/8 inch (3 mm)
D) shorten the external linkage rod 1/8 inch (3 mm)

Question 12

Which of the following bad driving practices is the most likely cause for clutch facings to be "thrown off" the clutch discs?

A) coasting
B) riding the clutch pedal
C) starting in an incorrect gear
D) skip-shifting

Question 13

Which type of clutch pressure plate design provides a constant plate load as the friction faces wear?

A) angle spring,pull-type
B) diaphragm spring,pull-type clutch
C) both A and B
D) neither A nor B

Question 14

Which type of clutch discs would best suit a linehaul truck with a high torque rise engine?

A) dampened disc with organic facings
B) rigid disc with ceramic facings
C) dampened disc with ceramic facings
D) rigid disc with asbestos facings

Question 15

Technician A says that bursting of clutch friction facings is often caused by coasting a truck with the clutch pedal depressed.Technician B says that a clutch pressure plate with warpage sufficient to insert a 0.003 inch (0.08 mm)thickness gauge under a straight edge must be replaced.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 16

What is the function of the clutch brake?

A) smooth shifts into first and reverse
B) assist the vehicle foundation brakes
C) smooth downshifts from high to low
D) all of the above

Question 17

What is generally considered to be the major cause of clutch failure?

A) excess heat
B) excess vibration
C) lack of lubrication
D) all of the above

Question 18

Which of the following dimensions is regarded as being correct for clutch brake squeeze at the clutch pedal?

A) 1 inch
B) 1 1/2 inches
C) 2 inches
D) 2 1/2 inches

Question 19

When installing a 15 1/2-inch clutch assembly,Technician A uses guide studs installed in the flywheel to support the weight.Technician B uses a splined pilot shaft when installing both 14- and 15 1/2-inch clutch assemblies.Who is correct?

A) Technician A
B) Technician B
C) Both Technicians A and B
D) Neither Technician A nor B

Question 20

Which of the following is the drive side of a clutch pack assembly?

A) flywheel
B) intermediate plate
C) clutch cover
D) all of the above

Question 21

Which of the following would most likely result if the intermediate plate drive pins in a pot type flywheel housing are not properly aligned?

A) clutch hangs-up on release
B) clutch release forks bind
C) release bearing grabs
D) all of the above

Question 22

Technician A says that one of advantages of a clutch brake is its ability to bring a vehicle to a halt at low speeds.Technician B says most current clutch brakes are intended to smooth shifts from neutral to either first or reverse.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 23

Which of the following components can easily be modified for use as a pilot shaft for installing clutch assemblies?

A) clutch fork shaft
B) used transmission input shaft
C) used axle stub
D) transmission tailshaft

Question 24

Technician A says that a Solo clutch should automatically adjust for the life of the clutch pack.Technician B says that any clutch using a lockstrap to set the adjusting ring,must be periodically adjusted.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 25

Technician A says that center (intermediate)plate binding on its drive pins can cause clutch release problems on a 14-inch clutch pack.Technician B says that it is a common shop practice to replace the friction facings on clutch discs when they wear out.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 26

What is the function of the rollers used on some clutch release forks (yokes)?

A) faster release
B) extended fork life
C) increases lube intervals
D) less heat transfer to release bearing

Question 27

Technician A says that when a clutch brake is damaged by driver abuse,the transmission must be removed to install a replacement clutch brake.Technician B says that a two-piece clutch brake can be used as a replacement for an integral brake.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 28

Where is a clutch (bell)housing flange face most susceptible to wear at its mating surface with the flywheel housing?

A) between 10 and 2 o'clock
B) 6 o'clock
C) between 3 and 8 o'clock
D) 12 o'clock

Question 29

Technician A says excessive clutch pedal free travel can result in a clutch that does not fully disengage.Technician B says that too little free pedal travel can result in a slipping clutch.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 30

When you use a clutch installation pilot shaft to align a clutch in preparation for installation,which set of splines must be aligned?

A) clutch friction disc splines
B) clutch shaft fork splines
C) transmission input shaft splines
D) engine mount splines

Question 31

When the Urge-to-move feature is used on an Eaton Autoshift with an AW clutch,what hardware component in the system makes this possible?

A) planetary gearset
B) torque converter
C) slip synchros
D) wet clutch

Question 32

Which of the following clutch pack components has to always rotate at the same speed as the engine flywheel?

A) pilot bearing inner race
B) release bearing
C) pressure plate
D) friction discs

Question 33

Which of the following clutch pack components never rotates in operation?

A) pressure plate
B) pressure plate springs
C) release bearing housing
D) pilot bearing

Question 34

What should 1 1/2 to 2-inches of clutch free pedal produce in free travel between the clutch release yoke fingers and the release bearing in a push type clutch?

A) zero lash
B) 1/8 inch (3 mm)
C) 1/4 inch (6 mm)
D) 1/2 inch (12 mm)

Question 35

What is required at PMI to maintain a Solo clutch through its service life?

A) check wear indicator only
B) lube release bearing only
C) both A and B
D) nothing,it is 100% maintenance-free

Question 36

Which of the following dimensions would be the specified clearance between a release bearing and clutch cover in a clutch pack with no clutch brake?

A) 1/4 inch (6 mm)
B) 1/2 inch (12 mm)
C) 3/4 inch (19 mm)
D) 1 inch (24 mm)

Question 37

When installing a clutch pack assembly,at what point should you knock out the wood chocks that hold off pressure plate spring pressure?

A) before mounting clutch to the flywheel
B) when pressure plate is bolted tight to the flywheel
C) after installing the transmission
D) final step before starting the engine

Question 38

Technician A says that coasting when a clutch is disengaged can cause engine overspeed.Technician B says that coasting with a clutch disengaged can spin the driven discs at speeds as high as 10,000 rpm due to the multiplication of drivetrain ratios.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 39

Technician A says that a clutch is fully disengaged when the pedal is all the way up.Technician B says a clutch is released when the pedal is moved from full travel to the floor.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 40

Which of the following dimensions would be a typical specified clearance between a release bearing and clutch cover in a clutch pack using a clutch brake?

A) 1/4 inch (6 mm)
B) 1/2 inch (12 mm)
C) 3/4 inch (19 mm)
D) 1 inch (24 mm)

Question 41

What is the creep feature of an Eaton wet clutch system known as?

A) urge-to-move
B) datalink mechanical
C) slippage
D) pneumatic actuation

Question 42

What does the acronym DM stand for?

A) datalink mechanical
B) direct modulated
C) drive master
D) driveline modulated

Question 43

In DM centrifugal clutch engagement,which phase occurs at the lowest rpm?

A) launch
B) touch-point
C) stall-point
D) powershift

Question 44

Technician A says that automated manual transmissions (AMTs)no longer require clutches.Technican B says that two-pedal AMTs have eliminated the clutch from the drivetrain.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 45

What determines the point at which a centrifugal clutch becomes fully engaged?

A) road speed
B) engine rpm
C) clutch pedal position
D) clutch shaft rpm