Hydraulic Assist Steering Flashcards
Steering assist is provided by:
a) a hydraulic pressure difference
b) a vacuum pump
c) a rotary motion of the flow control valve
d) a recirculating ball nut
a) a hydraulic pressure difference
List two (2) configurations of rack and pinion steering gears
a) end take off
b) centre take off
On rack and pinion steering gears, variable ratio is accomplished by changing the:
a) sector shaft teeth
b) rack gear teeth
c) pinion gear teeth
d) ball nut teeth
b) rack gear teeth
The rack gear and inner tie rods are protected by the:
a) pinion cover
b) flow control valve
c) ball nut
d) bellows boots
d) bellows boots
Name four (4) designs of hydraulic assist pumps
a) vane pump
b) roller pump
c) slipper pump
d) gear pump
What are the three (3) common properties of hydraulic assist pumps?
a) a positive displacement
b) demand
c) balanced
Positive displacement means that the pump:
a) delivers the same volume per revolution
b) always delivers the same pressure
c) delivers more pressure at higher speed
d) always delivers the same flow
a) delivers the same volume per revolution
Pressure is created by a ____________
Restriction
The flow control valve is designed to:
a) direct the fluid to the desired turn chamber
b) control system pressure
c) regulate fluid flow
d) regulate system pressure
c) regulate fluid flow
Electromechanical assist pumps do not require a:
a) flow control valve
b) pressure relief valve
c) directional control valve
d) power steering assist valve
a) flow control valve
List the two (2) components that make up a directional control valve
a) spool valve
b) valve body
the directional control valve components are held in alignment by the:
a) worm shaft
b) stub shaft
c) torsion bar
d) pinion gear
c) torsion bar
When the directional control valve is in alignment, the pressure in the turn chambers are equal
a) true
b) false
a) true
When the directional control valve is misaligned, the pressure in the turn chambers are equal
a) true
b) false
b) false
In order for the directional control valve to be aligned, the steering wheel must be in the straight ahead position
a) true
b) false
b) false
Variable assist steering provides full assist at __________ speeds.
parking lot
List the two (2) adjustments in order on a non-rack and pinion steering gear.
a) worm bearing preload
b) high spot / over centre mesh
List the two (2) items you have to check before you use the steering system analyzer
a) fluid
b) the drive system
Closing the valve on the steering system analyzer three times and noting the pressure readings is a test for what component?
a) directional control valve
b) pressure relief valve
c) flow control valve
d) power piston seal
b) pressure relief valve
Manually flushing a hydraulic steering system should be done with the engine running
a) true
b) false
b) false
