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Powertrain > 303c and d > Flashcards

303c and d Flashcards

1
Q

What type of transmission would you find in a cycling application machine?

A

Power shift

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2
Q

What type of transmission would you find in a hauling application ?

A

Automatic

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3
Q

First speed reduction?

A

Internal gear held
Sun gear input
Carrier output

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4
Q

Second speed reduction?

A

Internal gear input
Sun held
Carrier output

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5
Q

First speed overdrive?

A

Internal gear output
Sun held
Carrier input

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6
Q

Second speed overdrive?

A

Internal gear held
Sun gear output
Carrier input

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7
Q

First speed reverse?

A

Internal gear output
Sun gear input
Carrier held

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8
Q

Second speed reverse?

A

Internal gear input
Sun gear output
Carrier held

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9
Q

How do you get direct drive in a planetary?

A

Locking two members together

Driving to members at the same speed

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10
Q

When you have a planetary gear transmission with dual inputs. The output will be what?

A

Somewhere in between the two input speeds

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11
Q

What is tooth speed?

A

Refers to the number of gear teeth passing by a given point in a given period of time. And is measured in teeth per second

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12
Q

If you are rotating the both inputs at the same tooth speed but in opposite directions what do you get?

A

Neutral

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13
Q

2 clutch components?

A

Discs

Plates

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14
Q

What are clutch discs?

A

Steel discs that have friction material bonded to them. Either sintered bronze or a composite material

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15
Q

Where are clutch plates located?

A

Between every pair of clutch discs in a assembly

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16
Q

What type of clutches to countershaft transmissions use?

A

Rotating clutches

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17
Q

Powershift transmission control circuits?

A

Clutch application circuit
Torque converter charge circuit
Transmission lubrication circuit

18
Q

Where is oil sent to first in a transmission system?

A

Shift selector valve

19
Q

What can you do to move a machine equipped with a powershift or auto transmission?

A

Elevate drive wheels
Remove drive axles/ sun gear
Remove driveline/driveshaft

20
Q

Functions of a transmission scavenge pump?

A

Take leakage oil and sends it to reservoir. Preventing overheating from oil build up

21
Q

Speed selector spool?

A

Directs oil from the transmission charge pump to the speed clutches

22
Q

Modulation relief valve?

A

Controls maximum clutch application pressure

23
Q

Load piston?

A

Controls the rate of pressure rise in the clutch pistons. This is called clutch modulation and it is to prevent shift shock

24
Q

What is another name for the relief valve and what does it do?

A

Inlet relief valve. Acts as a torque converter pressure relief by limiting max pressure inside the torque converter when oil is cold

25
Q

Direction selector spool?

A

Directs oil from the transmission charging pump to the direction clutches to produce forward or reverse

26
Q

Steel reaction discs?

A

Notched on outside to engage in clutch housing

27
Q

Friction discs?

A

Teeth on inside that engage with splines on the outside of planetary ring gear

28
Q

Piston?

A

Hydraulically apply clutches

29
Q

Return springs?

A

Mechanically force pistons apart

30
Q

Machine ground speed and throttle pedals circuits are supplies by what?

A

Clutch pressure circuit

31
Q

Governed circuit?

A

Provides a ground speed reading off the back of the transmission to better control shift operation

32
Q

What else is governed pressure used for?

A

Used to apply and release the lockup clutch in the torque converter

33
Q

Purpose of modulator circuit?

A

Used to alter shift points in relation to operator demand.

Allows the engine to achieve max horsepower before a shift is made

Generates greater machine momentum before a shift

34
Q

4 types of shift dampening devices?

A

Orifice control

Modulation

Trimmer

Accumulator

35
Q

If a clutch is released more quickly than the clutch being applied is engaged during a shift what happens?

A

Condition known as rpm flare. Machine free wheels until clutch is applied

36
Q

What is it called when the machine briefly tries to operate 2 gears at once?

A

Shift shock

37
Q

Orifice control?

A

Uses an orifice to control clutch release rates my metering outlet oil from a clutch

38
Q

Shift control system components?

A

Input components

Processing components

Output components

39
Q

Power supply?

A

Electronic control systems require a stable voltage and adequate supply of current. If not it’s will run funny or not operate all together

40
Q

Speed sensor locations

A

Output of transmission

Turbine

41
Q

Processing components control what factors?

A

Up shifts and downshifts

Clutch modulation

Provides diagnostic info

Provides warning to operator

Powertrain (6 decks)

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