190303k Flashcards
Flywheel and clutch housing face runout checks are conducted to ensure components
will be parallel to one another during operation.
true
Why is the engagement pull in force important?
to ensure proper clamping force on the friction disc(s).
A typical overcentre clutch uses a special adapter ring to position and drive the clutch
disc(s).
true
Friction discs in an overcentre clutch cannot be glazed by oil because they are made
of a very absorbent, porous material.
false
Overcentre clutches use a type of linkage that requires a snap, overcentre movement
of the clutch handle during the engagement and disengagement process.
true
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
true
List three (3) types of special application clutches.
a) sprag
b) spring and roller
c) dog
d) cone and bevel
e) electromagnetic
f) oil (wet)
What is one (1) advantage of using an electromagnetic type clutch?
Mechanical linkage is eliminated and the clutch can be activated from a distance.
An electromagnetic clutch is engaged by current flow in the electromagnet and held
in engagement by centrifugal force.
false
An electromagnetic clutch is disengaged by applying reverse current flow in the
electromagnetic windings.
false
Explain the advantage(s) of using an oil clutch.
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.
All clutches serve what similar function?
they couple a drive and a driven unit together.
When checking flywheel housing face runout, what should be done with the crankshaft?
the crankshaft is held fully forward or rearward to eliminate any inaccuracies caused by crankshaft end play
What is an overrunning clutch?
a device that will drive in one direction and freewheel in the opposite direction
The basic spring and roller overrunning clutch is considered what type of clutch?
A one-way clutch. It can only be engaged in one direction. It must freewheel in the opposite direction