402A: Steering Fundamentals

Question 1

What carries the load of the vehicle in the king pin assembly?

Answer 1

Thrust bearing

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Question 2

Where is the thrust bearing located in a kingpin/steering knuckle assembly?

Answer 2

On the bottom of the kingpin assembly, bellow the axle.

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Question 3

What allows a steering wheel with multiple functions to rotate freely in both directions while still having signal and power going to the switches?

Answer 3

Clock spring

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Question 4

What could damage the clock spring during maintainance?

Answer 4

Turning the steering wheel while the steering shaft is disconnected

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Question 5

What comonent of the steering wheel should be inspected after a steering wheel air bag has been deployed?

Answer 5

Inspect the clock spring

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Question 6

What colour of wire is typical for the SRS in a steering wheel?

Answer 6

Yellow

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Question 7

What are the three main types of steering gears?

Answer 7

• Manual steering gear
• Integral power steering gear
• Rack and pinion

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Question 8

What is the role of the balls in a recirculating ball design steering gear?

Answer 8

• Reduce clearance between the worm shaft and ball nut assembly
• Provide as little play as possible
• Reduce friction

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Question 9

How is the pitman arm attached to the sector shaft?

Answer 9

Splined, with timing marks

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Question 10

What is another name for the manual steering gear?

Answer 10

Recirculating ball type

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Question 11

Is the one piece draglink adjustable?

Answer 11

No

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Question 12

What are the two adjustable types of draglinks?

Answer 12

Two and three piece

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Question 13

If wider steer tires are put on a unit, what adjustments must be made to the steering system?

Answer 13

• Adjust the steering stop screws
• Adjust the steering gear poppets

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Question 14

Why must the power steering fluid be kept extremely clean?

Answer 14

Clearances between the operating components in a power steering system are very small

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Question 15

What is the most common type of power steering gear?

Answer 15

Integral power steering gear
- Combines a hydraulic bookster with the steering gear assembly

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Question 16

In an integral power gear, what returns the rotary valve to neutral position when the steering wheel movement has stoped?

Answer 16

Torsion bar

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Question 17

What is used to release the pressure at the end of rack piston travel before the steering stops on the steering knuckle contact the axle?

Answer 17

Poppets

Question 18

A tie-rod end with right-hand threads should be threaded onto what side of the tie-rod tube?

Answer 18

Right-hand side

Question 19

What should toe-in be set to durring an allignment?

Answer 19

1/16” to 1/8”

Question 20

What is the maximum temperature that power steering fluid should reach?

Answer 20

121C or 250F

Question 21

When are dual steering gear systems typically used?

Answer 21

On axles over 16 000lbs

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Question 22

Steering rack piston poppets are designed to relieve pressure at what distance between the steering stops and axle pad?

Answer 22

1/8”

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Question 23

In a dual steering gear system, does the secondary steering gear need to have the sector shaft backlash set?

Answer 23

No

It is a spur gear in mesh with the rack piston and so there is no adjustment for backlash.

The main steering gear has a tapered sector shaft and requires the backlash to be set.

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Question 24

How are power steering hoses routed between the steering gears in a dual steering gear system?

Answer 24

In a criss-crossed manner as the secondary steering gear sector shaft must rotate in the opposite direction than the main steering gear.

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Question 25

What is the path of connection in the steering system starting from the steering column through to the steering knuckle?

Answer 25

• Steering column
• Worm shaft
• Sector shaft
• Pitman arm
• Drag link
• Upper steering arm
• Left steering knuckle
• Lower steering arm
• Tie rod end
• Tie rod
• Tie rod end
• Right lower steering arm
• Right steering knuckle