Deck 9: Drives, Clutches, and Transmissions

Question 1

Describe how a hydrostatic transmission works and how continuously variable shifting is achieved.

Answer 1

The engine drives a hydraulic pump that forces hydraulic fluid through pistons from the pump side to the other side of the pump called the motor side which is attached to the output shaft of the machine. By the use of an angled plate the transmission can obtain variable ratios by moving the plate from one angle to another.

Question 2

Offset gears reduce backlash.

Answer 2

True

Question 3

A ____ gear is one that doesn't move on the shaft to which it's attached.

A)fixed
B)sliding
C)sprag
D)scissors

Answer 3

A

Question 4

The clutch_______ applies pressure to the clutch plates and friction discs.

A)drive pulley
B)pressure plate
C)center ramp
D)judder spring

Question 5

Explain how an automatic transmission changes gears.

Question 6

Single plate manual clutches use oil instead of air to keep them cool.

Question 7

Centrifugal clutches use engine RPMs to engage.

Question 8

______clutches are often found on motor scooters and some ATVs.

A)Single plate
B)Multiple plate
C)Variable ratio
D)Dry

Question 9

Your customer's transmission is jumping out of gear. What components should you inspect closely upon disassembly of the transmission?

Question 10

A ____ allows a portion of the clutch to slip under high stress situations like rapid down shifting.

A)sprag
B)sheeve
C)centrifuge
D)back limiter

Question 11

The materials used to make friction plates is a well-kept secret by the makers of different clutches.

Question 12

Explain the difference between a direct drive and primary drive kick starting system.

Question 13

A ____ gear moves freely on its shaft.

A)fixed
B)sliding
C)sprag
D)scissors

Question 14

Describe how you would assess chain wear on a chain driven motorcycle and what criteria you would use to decide if it should be replaced.

Question 15

A direct drive gear ratio is a ratio that is less than 1:1.