Deck 14: Recirculating Ball Steering Gears

Question 1

In a power recirculating ball steering gear with a variable ratio, the steering ratio remains the same regardless of steering wheel position.

Answer 1

False

Question 2

High steering effort may be caused by a worm shaft bearing preload adjustment that is too tight.

Answer 2

True

Question 3

A loose worm shaft bearing preload adjustment may cause a rattling noise when driving on irregular road surfaces.

Answer 3

False

Question 4

Power recirculating ball steering gears may have sector teeth with a variable ratio.

Question 5

Technician A says steering gear mounting bolts with five ribs on each bolt head may be replaced with bolts containing three ribs on each bolt head. Technician B says loose steering gear mounting bolts may cause steering wheel play. Who is correct?

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

Question 6

Technician A says when the sector shaft adjusting screw is turned clockwise, the sector shaft moves downward. Technician B says a loose sector lash adjustment may cause steering wander. Who is correct?

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

Question 7

In a variable-ratio recirculating ball steering gear, the sector teeth have equal lengths.

Question 8

Steering wander is the amount of steering wheel movement before the front wheels begin to turn.

Question 9

A worn flexible coupling may cause excessive steering wheel free play.

Question 10

Technician A says a loose worm shaft thrust bearing preload adjustment causes excessive steering wheel free play. Technician B says a loose sector shaft lash adjustment causes excessive steering wheel free play. Who is correct?

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

Question 11

In a power recirculating ball steering gear, oil leaks may occur at all of these locations EXCEPT:

A) The vent opening in the top of the worm shaft
B) The pitman shaft seal
C) The side cover O-ring seal
D) The adjuster plug seal

Question 12

After a power recirculating ball steering gear is properly adjusted, the steering wheel free play is still excessive. Technician A says the steering gear mounting bolts may be loose. Technician B says the high-pressure power steering hose may be restricted. Who is correct?

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

Question 13

Kickback is prevented in a power recirculating ball steering gear by:

A) The preload between the ball nut teeth and the sector gear teeth
B) The flexible coupling in the steering shaft
C) An interference fit between the sector shaft and ball nut
D) A poppet valve in the pressure inlet fitting

Question 14

A power recirculating ball steering gear has repeated pitman shaft oil seal failures. The most likely cause of this problem is:

A) Loose sector lash adjustment
B) Tight worm shaft bearing preload adjustment
C) Loose steering gear mounting bolts
D) Worn pitman shaft bushing or bearing

Question 15

Restricted power steering hoses may cause excessive steering effort.

Question 16

A power recirculating ball steering gear has uneven steering effort, but the fluid level and belt tension are satisfactory. Technician A says the worm shaft bearings may be worn and pitted. Technician B says the sector lash adjustment may be too tight. Who is correct?

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

Question 17

A customer complains about excessive erratic steering effort on a vehicle with a power recirculating ball steering gear. The problem is worse when the steering gear is cold. The belt tension, power steering pump pressure, and fluid level are satisfactory. Technician A says the ball nut piston ring may be worn. Technician B say the ball nut piston cylinder may be scored. Who is correct?

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

Question 18

A steering gear with a 15:1 ratio requires more steering effort compared with a steering gear with a 13:1 ratio.

Question 19

Technician A says when driving a vehicle straight ahead, equal pressure exists on each side of the ball nut piston in a power recirculating ball steering gear. Technician B says when cornering with a power recirculating ball steering gear, torsion bar twisting positions the spool valve inside the rotary valve so fluid pressure is directed to the appropriate side of the ball nut piston. Who is correct?

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

Question 20

An interference fit between the sector shaft and the ball nut teeth eliminates gear lash.

Question 21

In a power recirculating ball steering gear, when does the spool valve direct power steering fluid pressure to the appropriate side of the recirculating ball piston?

Question 22

What will a loose sector lash adjustment cause?

Question 23

In a power recirculating ball steering gear with the front wheels straight ahead and the engine running, the fluid on each side of the recirculating ball piston helps prevent what?

Question 24

In a power recirculating ball steering gear, what is the purpose of torsion bar twist?

Question 25

Describe the results of loose worm shaft bearing preload and sector lash adjustments.

Question 26

Describe the flow of power steering fluid when a vehicle is driven straight ahead.

Question 27

In a power recirculating ball steering gear, how is kickback prevented?

Question 28

Compare a constant ratio steering gear with a ratio of 13:1 to a constant-ratio steering gear with a ratio of 16:1. Which requires less steering effort?

Question 29

What does the worm shaft end plug adjustment provide?

Question 30

Explain the difference between constant-ratio and variable-ratio steering gear sector shaft teeth.

Question 31

What is bearing preloaded?

Question 32

In a recirculating ball steering gear, how is the interference fit between the sector teeth and the ball nut teeth obtained?

Question 33

When a faster steering system is compared with a slower steering system, the faster system provides what?

Question 34

A variable-ratio steering gear varies the gear ratio based on what?

Question 35

Power recirculating ball steering gear operation is being discussed. Technician A says when driving the vehicle straight ahead, the spool valve and rotary valve position directs the power steering fluid flow back through the return hose to the pump inlet. Technician B says when driving the vehicle straight ahead, the power steering pump pressure is low. Who is correct?

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

Question 36

What is steering wheel free play?

Question 37

Technician A says when removing the pitman arm from the pitman shaft, mark this arm in relation to the shaft. Technician B says to use a hammer and punch to remove the pitman arm from the pitman shaft. Who is correct?

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