190303Ja Flashcards

1
Q

What are the five (5) functions of the drive axle assembly?

A

a) The drive axle assembly must withstand and support the weight of the vehicle
and load
b) The drive axle assembly provides a gear reduction in the basic vehicle
powertrain.
c) The drive axle assembly must change the direction of torque by 90°.
d) The drive axle must transfer torque evenly between the two wheel assemblies
e) The operator is able to lock the wheel ends in a low traction situation.

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2
Q

The main function of the carrier housing is to

A

hold the internal gear components.

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3
Q

The pinion bearing cage is always a removable component of the carrier housing.

A

false;

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4
Q

The overhung pinion differs from the straddle mount in that it has a short stub that
extends past the end of the pinion gear.

A

false;

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5
Q

The input drive pinion is in constant mesh with the:

A

bevel gear.

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6
Q

What is the main purpose of the thrust screw?

A

The thrust screw prevents the bevel gear from deflecting away from the input pinion
during heavy torque loads.

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7
Q

The bevel gear is bolted directly to the:

A

flanged case half.

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8
Q

The differential pinions are driven by the:

A

cross shafts.

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9
Q

The most common differential carrier assembly used today is the:

A

single speed single reduction.

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10
Q

Which components are attached to the drive axle housing?

A

all of the above

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11
Q

Number the following components in the path-of-power through the single speed,
single reduction carrier assembly. Begin with the input shaft yoke and end with the
wheel assemblies.

A
. input shaft yoke 1
differential cross shaft 5
differential case 4
axle shafts 8
input drive pinion 2
bevel gear 3
axle side gears 7
differential pinions 6
wheel assemblies 9
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12
Q

The torque available to the wheel with good traction in a wheel spin condition is:

A

the same as the torque to the spinning wheel.

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13
Q

When a vehicle is turning a corner, the differential assembly allows the:

A

outer drive wheel to rotate faster than the inner drive wheel.

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14
Q

Semi-floating axle shafts can be removed from a vehicle when the weight of the vehicle is on the drive wheels.

A

false;

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15
Q

Transfer cases always incorporate a differential to allow for a difference in speed
between the two output shafts

A

false;

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16
Q

. A planetary differential allows for torque to be proportioned between its outputs

A

true;

17
Q

. Why is it preferable to allow the operator control over the differential lock?

A

To minimize tire spin and maximize traction in low traction conditions, but to also allow differential action in high traction conditions and while hauling at higher
speeds.

18
Q

True or false

The axle spider gears are able to rotate at different speeds then the case when required?

A

True

19
Q

What are some identification numbers you can find stamped on pinion and bevel gears?

A

Steel he code, part number, matched set number, manufacture date, tooth combination.

20
Q

What’s the formula for gear ratio?

A

Drive

21
Q

True or false

The differential assembly will always deliver the same amount of torque to each wheel

A

True

22
Q

What’s the formula for bevel gear speed

A
   2
23
Q

What is the purpose of a no-spin differential?

A

It drives both wheels at the same time at the same speed.

24
Q

The no-spin differential can not take corners. T/F

A

True. The unit disengages to allow the outer wheels to turn faster.

25
Q

What assists with the outer faster wheel speed?

A

When the outer wheels turn faster, it overcomes a tapered clutch. A spring puts the clutch back into place when the outer wheels reach the same speed as the inner rings.

26
Q

What percentage of the weight of the equipment and load is carried by a full-floating axle?

A

Zero percent.

27
Q

The common arrangement for a planetary final drive is input on the carrier, output on the internal gear and the sun is held.(T/F)

A

False.

28
Q

What component of a drive axle provides a framework for mounting the carrier assembly and all of the attached components?

A

The axle housing.

29
Q

What is the opening in an axle housing where the carrier assembly is installed?

A

The bowl.

30
Q

The term GAWR means?

A

Gross axle weight rating

31
Q

For transfer cases with a standard interaxle differential, torque is split equally between the front and rear drive shafts. T/F

A

True