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electrical and steering > steering A-B > Flashcards

steering A-B Flashcards

1
Q

what is wheel lean

A

the ability to tilt the wheels side to side

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2
Q

when a grade is moving dirt with the blade set to an angle the machine will have a tendency to move to

A

the leading edge of the blade

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3
Q

how can you offset the machine being pulled in he direction of the leading edge of the blade on a motor grader

A

with the wheel tilt function

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4
Q

what is an advantage of rear wheel steering

A

tight maneuverability - less effort to steer the wheels

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5
Q

what is a disadvantage of rear wheel steering

A

heavy loads can cause the wheels to lose traction - cant handle high speeds

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6
Q

what is crab steering

A

allows all four tires to turn

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7
Q

what is circle steering

A

when the rear tires turn on the same track as the front tires

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8
Q

when a machine has a combination steering set up how are the wheels normally operated

A

with the steering wheel controlling one axle either the front or the back

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9
Q

when a combination steering system needs to be operated in crab how are the wheels controlled

A

the steering wheel will operate the front or the back axle while a separate switch or lever is required to operate the other

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10
Q

what type of steering would allow a heavily loaded machine to be operated in tight or confined areas

A

skid steer

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11
Q

what is articulation steering

A

when two half’s of a machine pivot at a articulation joint by hydraulic cylinders

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12
Q

what is a part time power steering system

A

is a power assist system - amount of assist depends on wheel resistance

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13
Q

what is full time power steering assist

A

provides total power steering as long as the engine is running

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14
Q

what is a follower valve used for

A

when a steering wheel is turned and held at a certain position the valve will move the cylinders to match the angle held by the steering wheel

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15
Q

what is another name for a full time power steering system

A

a hydraulic steering system or subsystem

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16
Q

what might be the reason for jerky hydraulic motion

A

aerated hydraulic oil

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17
Q

what is sudocavitation

A

aeration

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18
Q

what is one of the most important factors in a long lasting hydraulic system

A

clean hydraulic oil

19
Q

what is a reversing valve

A

a directional control valve

20
Q

what is a HMU

A

hydraulic metering unit

21
Q

what is another name for a HMU

A

orbital

22
Q

how do hydraulic cylinders in a steering system operate

A

in a push pull configuration

23
Q

what is a steering cushion

A

used to limit the maximum turning angle

24
Q

what is a neutralizer valve

A

used to relieve or unload hydraulic pressure just as the maximum angle is reached . this reduces the maximum impact force at the steering cushions

25
Q

what are the two types of filters used

A

depth and screen type

26
Q

is there a mechanical connection between a full time power steering system

A

no

27
Q

why does a co-ordinated steering system on a loader require less effort

A

because the rear wheels follow in the same path as the front wheels so they do not have to break new ground during the steering process

28
Q

what is another name for the tractor scraper articulated hitch assembly

A

the goose neck

29
Q

never use your hand to check for

A

hydraulic oil leaks

30
Q

why must hydraulic oil be raised to proper operating temp before testing can begin

A

to eliminates any uncertainty during testing due to thick oil, leakage and or poor circulation

31
Q

what must you do to systems containing hydraulic accumulators

A

properly discharge the system

32
Q

when working in the articulation hitch area what should be installed

A

lock bar or safety bar

33
Q

when removing pivot pin caps you should never use

A

a hammer - mating surfaces can become deformed

34
Q

what does the tie rod provide in a steering system

A

proper toe adjustment

35
Q

what might have to be adjusted before tie rod end play can be determined

A

loose wheel bearing may be interpreted as tie rod endplay

36
Q

when disconnecting articulation hitch what should be considered before removal

A

support the front and rear of the machine with stands to prevent them from dropping when disconnected

37
Q

what are the two types of directional control valves

A

HMU - Spool steering valve

38
Q

hydraulic skid steering system typically involves

A

a closed loop system

39
Q

what is another name for the swash plate in a hydraulic piston pump

A

cam plate

40
Q

the ability of the hydraulic cooler is greatly dependant on

A

the amount of airflow through the cooler assembly

41
Q

the only way to completely remove all contaminants from the hydraulic steering system is to

A

remove disassemble and thoroughly clean and flush

42
Q

if the machine steering system is unsafe and movement of the machine would be a danger you should not

A

take it out for a road test

43
Q

even if the machine is equipped with quick couplers

A

you should release the system pressure and loosen the quick coupler seal caps very slowly in case system pressure exists

electrical and steering (8 decks)

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