Clutch Fundamentals and Service

Question 1

1. Flywheel and clutch housing face run out checks are conducted to ensure components will be parallel to one another during operation.
   a) true
   b) false

Answer 1

1.

a) true

Question 2

2. Why is the engagement pull in force important?
   a) to ensure the clutch does not come out of engagement
   b) to keep the pilot bearing in its bore
   c) to ensure proper clamping force on the friction disc(s).

Answer 2

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

Question 3

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

Answer 3

3.

a) True

Question 4

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

Answer 4

4.

b) false

Question 5

5. Overcentre clutches use a type oflinkage that requires a snap, overcentre movement of the clutch handle during the engagement and disengagement process.
   a) true
   b) false

Answer 5

5.

a) true

Question 6

6. 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
   b) false

Answer 6

6.

a) true

Question 7

7. List three (3) types of special application clutches.
   a)
   b)
   c)

Answer 7

7. Any three (3) of the following are correct.
   a) sprag
   b) spring and roller
   c) dog
   d) cone and bevel
   e) electromagnetic
   f) oil (wet)

Question 8

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

Answer 8

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

Question 9

9. An electromagnetic clutch is engaged by current flow in the electromagnet and held in engagement by centrifugal force.
   a) true
   b) false

Answer 9

9.

b) false

Question 10

10. An electromagnetic clutch is disengaged by applying reverse current flow in the electromagnetic windings.
    a) true
    b) false

Answer 10

10.

b) false

Question 11

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

Answer 11

11. 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.