Deck 8: Wheel Bearing and Seal Service

Question 1

What term is used to describe the outside component of a wheel bearing that has a smooth, hardened surface for rollers or balls to ride on?

A) Roller cage
B) Inner race
C) Bearing cage
D) Outer race

Answer 1

D

Question 2

The component in a wheel bearing that maintains the proper spacing between the roller bearings or ball bearings is called a(n) ________.

A) Bearing cage
B) Outer race
C) Inner race
D) Roller cage

Answer 2

A

Question 3

Because tapered roller bearing assemblies use tapered components, the wheel bearing assembly must be adjusted to have the proper ________ between the tapered rollers and races when the bearing assemblies are installed.

A) Friction
B) Running clearance
C) Lubrication
D) All of the above

Answer 3

B

Question 4

In a 3/4 floating axle design, there is a single bearing assembly (usually a ball or ________ style) between the outside of the axle tube and the hub.

A) Cylindrical roller bearing
B) Semifloating
C) Double Flange
D) Single bearing

Question 5

Failure analysis starts with removing the faulty wheel bearing and cleaning it and the _____ thoroughly.

A) Spindle
B) Races
C) Axle
D) Tire

Question 6

One way to isolate a wheel bearing noise from a transmission noise is to drive the vehicle at the speed at which it is making the noise and then shift into a higher or lower transmission gear while _________.

A) Speeding up
B) Slowing down
C) Maintaining the same speed
D) Coasting to a stop

Question 7

_________ refers to the absence of clearance in the bearing and the specified amount of pressure forcing the bearing components together.

A) Preload
B) Endplay
C) Spacing
D) Viscosity

Question 8

Which of the following is NOT a common tool used to maintain and repair wheel bearings?

A) Bore gauge
B) Seal puller
C) Cotter pin removal tool
D) Dust cap pliers

Question 9

Tech A says that over time a grease seal can wear a groove in the sealing surface of the axle or shaft. Tech B says that grease seals need to be replaced every time the bearing is removed. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 10

Tech A says when installing a bearing race you should use a 3-lb hammer and a brass drift. Tech B says that when installing a bearing race you should use a 3-lb hammer and a 3/8" drive extension. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 11

Which of the following is a component of a typical wheel bearing?

A) Inner race
B) Outer race
C) Both A and B
D) None of the above

Question 12

Tech A says that wheel bearing assemblies include roller bearings. Tech B says that wheel bearing assemblies include ball bearings. Who is correct?

A) Tech A
B) Tech B
C) Both Tech A nor B

Question 13

When bearings are used in pairs, the individual tapered roller bearing assemblies are generally referred to as:

A) bearing one and bearing two.
B) inner (or inboard) and outer (or outboard).
C) Both A and B
D) None of the above

Question 14

Tech A says that you should suspect a faulty wheel bearing whenever an unusual howling or rough sound comes from the wheel areas when the vehicle is being driven. Tech B says that you should suspect a faulty wheel bearing whenever an unusual rumbling or whirring sound comes from the wheel areas when the vehicle is being driven. Who is correct?

A) Tech A
B) Tech B
C) Both Techs A and B
D) Neither Tech A nor B

Question 15

Which of the following is a method of diagnosing wheel bearing assemblies?

A) Wiggling the tire
B) Test-driving
C) Rotating the wheel
D) All of the above

Question 16

Tech A says that servicing the wheel bearings is a common part of a brake job if the vehicle has serviceable wheel bearings. Tech B says that if the vehicle uses non-serviceable bearings, the bearings should be checked during a brake job and replaced if they are worn out. Who is correct?

A) Tech A
B) Tech B
C) Both Techs A and B
D) Neither Tech A nor B

Question 17

Tech A says that packing a wheel bearing assembly can be done by hand with proper results. Tech B says that packing a wheel bearing assembly with a bearing packer will get the proper results. Who is correct?

A) Tech A
B) Tech B
C) Both Techs A and B
D) Neither Tech A nor B

Question 18

Tech A says that the best approach to determining if a noise is a wheel bearing or tire is to drive over different road surfaces such as asphalt and concrete. If the noise changes, it is likely a wheel bearing problem. Tech B says that the best approach to determining if a noise is a wheel bearing or tire is to drive over different road surfaces such as asphalt and concrete. If the noise does not change, it is likely a tire problem. Who is correct?

A) Tech A
B) Tech B
C) Both Techs A and B
D) Neither Tech A nor B

Question 19

Tech A says that the wheel bearing can damage the wheel hub or spindle/axle in a vehicle. Tech B says that bearing failure involves the race spinning in either the machined bore of the wheel hub or on the surface of the spindle/axle. Who is correct?

A) Tech A
B) Tech B
C) Both Techs A and B
D) Neither Tech A nor B

Question 20

Tapered roller bearings are used typically in what configuration?

A) Same direction pairs only (both fac
B) Opposing pairs only (both facing d
C) Both same direction pair and opposi
D) Neither same direction nor opposing

Question 21

Technician A states that "serviceable"and "sealed bearings" are typical categories of wheel bearings used in vehicles. Technician B states that sealed bearings require periodical maintenance. Who is correct?

A) Technician A
B) Technician B
C) Both Technician A and Technician B
D) Neither Technician A nor Technician B

Question 22

Technician A says that the best approach to determining if a noise is a wheel bearing is to drive the vehicle at the speed at which it occurs and then lightly rock the car side to side using the steering wheel. If the noise changes, it is likely a wheel bearing problem. Technician B says that the best approach to determining if a noise is a wheel bearing or tire is to drive over different road surfaces such as asphalt and concrete. If the noise does not change, it is likely a tire problem. Who is correct?

A) Technician A
B) Technician B
C) Both Technician A and Technician B
D) Neither Technician A nor Technician B

Question 23

All of the following can be caused by a loose or worn wheel bearing, EXCEPT:

A) vehicle wander.
B) vehicle engine oil leak.
C) vehicle shimmy.
D) vehicle vibration.

Question 24

Technician A says that you should suspect a faulty wheel bearing whenever an unusual howling or rough sound comes from the wheel areas when the vehicle is being driven. Technician B says that you should suspect a faulty wheel bearing whenever an unusual screeching sound comes from the wheel areas when the vehicle is being braked. Who is correct?

A) Technician A
B) Technician B
C) Both Technician A and Technician B
D) Neither Technician A nor Technician B

Question 25

All of the following are methods of diagnosing wheel bearing assemblies, EXCEPT:

A) wiggling the tire.
B) test-driving.
C) rotating the wheel.
D) diagnostic scan tool.

Question 26

Technician A says that on most front wheels the replaceable sealed bearing is pressed between the hub and the wheel flange and is the more difficult to replace. Technician B says that the unitized wheel hub includes a sealed wheel bearing, a removable wheel hub, and possibly the wheel flange. This type can be unbolted. Who is correct?

A) Technician A
B) Technician B
C) Both Technician A and Technician B
D) Neither Technician A nor Technician B

Question 27

In case of serviceable wheel bearings, the maximum allowable play is:

A) 0.001" (0.025mm).
B) 0.010" (0.254 mm).
C) 0.015" (0.381 mm).
D) 0.020" (0.508 mm).

Question 28

Which component of a wheel bearing holds the rollers or balls in place?

A) An outer race
B) An inner race
C) A bearing cage
D) Interference fit

Question 29

All of the following statements with respect to sealed and serviceable bearings are true, EXCEPT:

A) Sealed bearing assemblies are prefilled with lubricant and have integrated grease seals unlike serviceable bearings.
B) In serviceable bearings proper running clearance needs to be adjusted whereas in sealed bearing it is manufactured with clearance.
C) Sealed bearing assemblies do not need periodic maintenance unlike serviceable bearings.
D) Sealed bearing assemblies cannot fail at any time, whereas serviceable bearings can fail.

Question 30

Which type of bearing is recommended for a vehicle which is subjected to heavy loads and thrust during turning around the corners?

A) Wheel bearing
B) Cylindrical roller bearing
C) Tapered roller bearing
D) Ball bearing

Question 31

Choose the correct statement describing grease seals:

A) Grease seals cannot keep dirt away.
B) Grease seals cannot provide sealing against rotating surface.
C) Grease seals can be re-used and need not be replaced.
D) Grease seals prevent leakage of lube and prevent dirt and contamination.

Question 32

Which of the following components should be mandatorily inspected whenever the wheel bearings are removed and serviced?

A) The wheel hub
B) Wheel races
C) Race surface
D) Bearing assembly

Question 33

Tech A says that wheel bearings need to be replaced as a set: bearing and race. Tech B says that the wheel bearings and races on both sides of the vehicle must be replaced if one side fails. Who is right?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 34

Two technicians are discussing how to install a replacement tapered front wheel bearing. Tech A says when installing a bearing race you should use a 5 lb hammer and a brass drift. Tech B says that you should use a hydraulic press or a hammer and bearing race installer, carefully drive the race until it is fully seated in the hub. Who is right?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 35

Tech A says that when a race is fully seated, a sharp metallic sound will be produced when installation is complete. Tech B says that to be sure a race is fully seated, the wheel bearing adjusting nut should be tightened to at least 100 ft-lbs of torque, which will finish seating it. Who is right?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 36

If a vehicle uses serviceable bearings, the maximum allowable play is approximately ________.

A) 0.010"
B) 0.020"
C) 0.030"
D) 0.040"

Question 37

________ can be damaged from excessive loads such as overloading the vehicle, shock loads such as hitting a large pot hole, improper adjustment, or just plain wear over time.

A) Brake lines
B) Brake pads
C) SRS systems
D) Wheel bearings

Question 38

Faulty bearings creates an unusual noise which usually can be heard once the vehicle gets up to _____ mph.

A) 30-40
B) 0-5
C) 15-20
D) 40-50

Question 39

At what positions is it best to grab the tire and lift the wheels off the ground to check the wheel bearings for looseness?

A) 7 o'clock and 9 o'clock
B) 6 o'clock and 12 o'clock
C) 3 o'clock and 12 o'clock
D) 9 o'clock and 12 o'clock

Question 40

It can be challenge is to distinguish between a wheel bearing noise and a tire noise. The best approach to this problem is to drive over different road surfaces. Tech A states that if the noise changes, it is likely a tire problem. Tech B states that if the noise does not change, it is likely to be a faulty wheel bearing. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B