190303c

Question 1

What is another name for the reactionary member in a planetary?

Answer 1

Held member or being held.

Question 2

What is the middle gear in a planetary called?

Answer 2

The sun gear.

Question 3

What is the gear called that is in constant mesh with the sun and the internal gears?

Answer 3

Planetary gears or planet pinons.

Question 4

Planetary gears are mounted, what is the member called the gears are mounted to?

Answer 4

Planetary carrier.

Question 5

What are the two names of the outside gear that is a constant mesh with the planetary pinions?

Answer 5

Internal gear or ring gear.

Question 6

What determines the number of planetary pinons in a gear set?

Answer 6

Depends on the load or torque the gearset is required to transmit. The greater the number of pinons, the greater the torque.

Question 7

What is gear ratio?

Answer 7

Refers to the number of revolutions the input gear makes to complete one revolution of the output gear.

Question 8

What is the formula for gear ratio?

Answer 8

Drive

Question 9

What is an example of a 3 to 1 ratio gear set?

Answer 9

Non hunting reduction gear set.

Question 10

What is an example of 4.25:1 gearset?

Answer 10

Partial non-hunting reduction gear set.

Question 11

What is an example of a 4.11111111:1 gearset?

Answer 11

A hunting reduction gear set.

Question 12

Why are planetary gears used in powershift and automatic transmissions?

Answer 12

These are used as a basic means to modify torque and speed from the engine.

Question 13

In a planetary gear set how do you get 1st speed reduction?

Answer 13

Input is the sun gear
Output is the carrier
Held is the internal gear

Question 14

How do you get a 2nd speed(mild) reduction in a planetary gear set?

Answer 14

Input is the internal gear
Output is the carrier
Held(reactionary) sun gear

Question 15

Explain 1st speed overdrive?

Answer 15

Input is the planet carrier
Output is the internal
Sun gear is held

Question 16

Explain 2nd speed overdrive?

Answer 16

Input is the carrier
Output is the sun
Internal gear is held reactionary

Question 17

In a planetary gear set if the carrier is held you will always get what condition?

Answer 17

Reverse

Question 18

Explain reverse reduction in a planetary?

Answer 18

Carrier is held
Sun is the input
Internal gear is the output

Question 19

How is reverse overdrive is achieved ?

Answer 19

Carrier is held reactionary
Internal gear is input
Sun gear is output

Question 20

3 way to get neutral in a planetary?

Answer 20

1) no held member
2) no input(drive)
3) sun and internal gear driven in opposite directions at the same TOOTH SPEED

Question 21

Direct drive in a planetary

Answer 21

1) locking 2 members together

2) driving 2 members in the same direction at the same rpm

Question 22

A clutch that holds an internal gear to transmission case is also know as?

Answer 22

Brake

Question 23

A single planetary gear set must meet what 3 conditions?

Answer 23

1) One member must be drive or input
2) one member must be driven or output
3) one member must be reaction(held)

Question 24

What are the two basic design types of powershift and automatic transmissions?

Answer 24

Planetary type and countershaft type.

Question 25

A dump truck is an example of a machine used in a cycling type application. (T/F)

Answer 25

False

Question 26

A scraper is typically used in a hauling application. (T/F)

Answer 26

True

Question 27

What are the two type of clutch discs used in transmission clutch assemblies

Answer 27

Clutch discs and clutch plates

Question 28

What is the purpose of the grooves on the face of the friction material?

Answer 28

Carry oil to lube the discs when the clutch is disengaged and allow the oil to be squeezed out when clutch is applied

Question 29

How are the transmission clutch packs applied?

Answer 29

Hydraulically Actuated piston assemblies

Question 30

Reverse gear in a countershaft transmission is possible through two main components

Answer 30

Idler gear on countershaft and reverse clutch activation

Question 31

Gear selection in a countershaft transmission is engaged by

Answer 31

Drilled oil passages that hydraulically apply clutch discs

Question 32

Countershaft transmissions are made by combining?

Answer 32

Reversing countershafts with countershafts that provide multiple speed ranges through clutch disc operation

Question 33

The function of the transmission in a piece of mobile heavy equipment is to modify the engine power that propels the machine. The transmission allows the operator to

Answer 33

decrease vehicle speed and increase torque under conditions of heavy load. Speed can be increased and torque decreased when the load is light.

Question 34

Many heavy equipment transmissions provide a place to couple auxiliary components such as hydraulic pumps. This drive is known as:

Answer 34

power takeoff.

Question 35

The major advantage of using powershift or automatic transmissions rather than a manual transmission is that

Answer 35

is that power flow is not interrupted when shifts are made.

Question 36

A powershift differs from an automatic transmission in that shifts are made solely at the discretion of the operator. a) true b) false

Answer 36

true

Question 37

The planetary gear set component that meshes with the sun and internal gear is called the planet carrier. a) true b) false

Answer 37

false | The planet pinions do

Question 38

A gear ratio that is expressed .33:1 means that:

Answer 38

the input must be rotated .33 revolutions to produce one output revolution.

Question 39

Which component is being held reactionary when a planetary gear set is producing its deepest speed reduction?

Answer 39

the internal gear

Question 40

. Which component of a single planetary gear set is the input member when the output member is in overdrive?

Answer 40

the carrier

Question 41

Countershaft type powershift and automatic transmissions transmit power by locking spur gears to a countershaft using a hydraulically applied clutch. a) true b) false

Answer 41

true

Question 42

How are transmission clutch assemblies applied?

Answer 42

A pressurized oil flow from the transmission charging pump.

Question 42

How are clutch assemblies applied and released

Answer 42

Hydraulically applied | Spring released

Question 43

What are two friction materials used to make clutch discs

Answer 43

Sintered bronze | Composite materials

Question 44

Where are clutch plates located

Answer 44

Between every pair of clutch discs