402A: Steering Fundamentals Flashcards
What carries the load of the vehicle in the king pin assembly?
Thrust bearing
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Where is the thrust bearing located in a kingpin/steering knuckle assembly?
On the bottom of the kingpin assembly, bellow the axle.
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What allows a steering wheel with multiple functions to rotate freely in both directions while still having signal and power going to the switches?
Clock spring
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What could damage the clock spring during maintainance?
Turning the steering wheel while the steering shaft is disconnected
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What comonent of the steering wheel should be inspected after a steering wheel air bag has been deployed?
Inspect the clock spring
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What colour of wire is typical for the SRS in a steering wheel?
Yellow
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What are the three main types of steering gears?
- Manual steering gear
- Integral power steering gear
- Rack and pinion
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What is the role of the balls in a recirculating ball design steering gear?
- Reduce clearance between the worm shaft and ball nut assembly
- Provide as little play as possible
- Reduce friction
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How is the pitman arm attached to the sector shaft?
Splined, with timing marks
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What is another name for the manual steering gear?
Recirculating ball type
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Is the one piece draglink adjustable?
No
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What are the two adjustable types of draglinks?
Two and three piece
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If wider steer tires are put on a unit, what adjustments must be made to the steering system?
- Adjust the steering stop screws
- Adjust the steering gear poppets
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Why must the power steering fluid be kept extremely clean?
Clearances between the operating components in a power steering system are very small
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What is the most common type of power steering gear?
Integral power steering gear
- Combines a hydraulic bookster with the steering gear assembly
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In an integral power gear, what returns the rotary valve to neutral position when the steering wheel movement has stoped?
Torsion bar
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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?
Poppets
A tie-rod end with right-hand threads should be threaded onto what side of the tie-rod tube?
Right-hand side
What should toe-in be set to durring an allignment?
1/16” to 1/8”
What is the maximum temperature that power steering fluid should reach?
121C or 250F
When are dual steering gear systems typically used?
On axles over 16 000lbs
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Steering rack piston poppets are designed to relieve pressure at what distance between the steering stops and axle pad?
1/8”
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In a dual steering gear system, does the secondary steering gear need to have the sector shaft backlash set?
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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How are power steering hoses routed between the steering gears in a dual steering gear system?
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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