190303k Flashcards

1
Q

Flywheel and clutch housing face runout checks are conducted to ensure components
will be parallel to one another during operation.

A

true

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2
Q

Why is the engagement pull in force important?

A

to ensure proper clamping force on the friction disc(s).

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3
Q

A typical overcentre clutch uses a special adapter ring to position and drive the clutch
disc(s).

A

true

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4
Q

Friction discs in an overcentre clutch cannot be glazed by oil because they are made
of a very absorbent, porous material.

A

false

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5
Q

Overcentre clutches use a type of linkage that requires a snap, overcentre movement
of the clutch handle during the engagement and disengagement process.

A

true

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6
Q

A spring scale positioned at a specific distance up the clutch handle is used to
calculate the amount of pull required to cause an overcentre clutch to snap into
engagement

A

true

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7
Q

List three (3) types of special application clutches.

A

a) sprag
b) spring and roller
c) dog
d) cone and bevel
e) electromagnetic
f) oil (wet)

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8
Q

What is one (1) advantage of using an electromagnetic type clutch?

A

Mechanical linkage is eliminated and the clutch can be activated from a distance.

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9
Q

An electromagnetic clutch is engaged by current flow in the electromagnet and held
in engagement by centrifugal force.

A

false

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10
Q

An electromagnetic clutch is disengaged by applying reverse current flow in the
electromagnetic windings.

A

false

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11
Q

Explain the advantage(s) of using an oil clutch.

A

Oil can cushion the clutch disc(s) and pressure plates(s) during engagement. The oil
can also cool and clean the clutch assembly during operation.

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12
Q

All clutches serve what similar function?

A

they couple a drive and a driven unit together.

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13
Q

When checking flywheel housing face runout, what should be done with the crankshaft?

A

the crankshaft is held fully forward or rearward to eliminate any inaccuracies caused by crankshaft end play

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14
Q

What is an overrunning clutch?

A

a device that will drive in one direction and freewheel in the opposite direction

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15
Q

The basic spring and roller overrunning clutch is considered what type of clutch?

A

A one-way clutch. It can only be engaged in one direction. It must freewheel in the opposite direction

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16
Q

The drive ring (adapter plate) is bolted to the flywheel and is splined to to the clutch ________

A

Disc/disc’s

17
Q

What could a leaking rear engine seal cause in an over centre clutch?

A

Cause the friction discs to glaze and thus causing the clutch to slip

18
Q

Pressure plates both fixed and floating should be inspected for what?

A

Warpage, wear, cracks and signs of over heating

19
Q

Brass release bearings should be inspected for?

A

Wear and proper clearances

20
Q

What should be checked after installing an over centre clutch?

A

Crankshaft end play