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4th year HET > STEERING SERVICE > Flashcards

STEERING SERVICE Flashcards

1
Q

what is the maximum internal flow rate loss when load testing

A

1 gal per min

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2
Q

when would the poppets need to be reset during a test

A

if the pressure does not drop at a full turn position or if the pressure drops more than 1/8’’ before steering stop

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3
Q

how can you check for a worn ball stud

A

grab the drag link and push and pull with approximately 100 pounds of force

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4
Q

what is the procedure to reset a clock spring if the tape comes off or was not taped before removal

A

1 turn the cover counter clockwise until it locks
2 turn the cover clockwise 4.5 times
3 Align the arrows on the top cover and the bottom housing
4 tape the assembly and install clock spring

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5
Q

what should be avoided during the initial filling phase of the power steering

A

turning the wheels . this could cause air to enter the system

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6
Q

what is one visual inspection that can be done on the power steering portion of the truck

A

the power steering level and oil condition

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7
Q

when operators use the steering wheel as an aid to get into the cab what is one thing you should make sure to check

A

loose mounting fasteners and broken pivot pins

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8
Q

why must you tape the clock spring together when removing

A

to keep both sides together and maintain there position

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9
Q

what are poppets

A

pressure-unloading valves that will relive assist pressure just before a full turn is made in each direction

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10
Q

when installing the steering wheel after removing the clock spring what could cause damage to the clock spring if not done during assembly

A

make sure the clip on the clock spring lines up with the slot on the steering wheel

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11
Q

when removing tie rod ends what should you do to make sure the toe isn’t chaged during reassembly

A

mark the location of each old tie rod end and count the number or rotations required to remove it . then install the new tie rod with the same number of revolutions

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12
Q

if the ball sockets are worn on the drag link what must you do

A

replace the drag link as an assembly or replace the draglink ends if possible

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13
Q

when testing the poppet what should the pressure be with 20 lbs of force on the wheel at full turn position

A

200 to 400 less than pump relief pressure

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14
Q

when removing the clock spring assembly what must you make sure of first

A

the wheels are straight ahead

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15
Q

when measuring king pins for wear what is the maximum allowable wear for the bushings

A

0.32mm or 0.015”

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16
Q

how can you eliminate the possibility of future accidents involving the installation of damaged steering components

A

by destroying removed damaged components

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17
Q

what are the two main hydraulic tests to be preformed on a power steering system

A

steering pump pressure and steering pump flow rate

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18
Q

why must you disconnect the battery ground cable when removing the steering column

A

to prevent accidental arcing or discharge SRS

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19
Q

how should the axle stops be set so the poppets operate properly

A

so that there are at lest 1 3/4 steering wheel turs from a straight ahead position to a full left or right turn

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20
Q

when road testing a truck for power steering problems what two main things are you looking for

A

steering response and vehicle handling characteristics

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21
Q

before removing any parts in a steering system what is the first step in troubleshooting

A

talk to the operator . then visual inspection

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22
Q

when measuring the steering knuckle for vertical wear what is the maximum amount of wear allowable before the shims and bearings should be inspected

A

0.30mm or 0.012”

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23
Q

when load testing the power steering system with a flow meter how long should you leave the valve closed for

A

no longer than 5 seconds

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24
Q

when installing new bushings into kingpin bores what must yo make sure of

A

that the seam of the bushing is 90 degrees to the spindle

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25
Q

can you fix a bent pitman arm

A

no

26
Q

after replacing tie rod ends what must be checked

A

wheel alignment

27
Q

what is used to retain the kingpin in the axle and steering knuckle

A

draw keys

28
Q

if the retaining fastener on the pitman arm becomes loose during operation what effect might this have

A

the splines on the pitman arm and the sector shaft may become damaged

29
Q

before a road test you should always make sure the

A

vehicle is safe to go on a road test

30
Q

before adjusting the poppets what must first be adjusted

A

the steering stops

31
Q

what would a squealing noise indicate during corners on a road test

A

tire skid is excessive

32
Q

after installing a new steering knuckle assembly how should you adjust the steering stops

A

on an alignment rack and the front tires positioned on radius plates

33
Q

what is important to pay attention to when installing the pitman arm onto the sector shaft

A

match up the timing marks on the pitman arm and sector shaft

34
Q

when trouble shooting steering problems where is the first place you should look

A

tires

35
Q

why is it important to wait two minuets after disconnecting batteries before removing the airbag

A

to allow internal components to completely discharge . or the airbag might deploy

36
Q

what precaution should be taken after the air bag has been installed and the batteries have been connected

A

positions yourself outside the cab and away from the front airbag when you turn on the key

37
Q

when cleaning the steering gear and reservoir what precautions should be taken

A

use lint free rags and avoid solvents getting into the steering gear

38
Q

wheels should not be held more than how long against stops to prevent steering stop damage

A

no more than five seconds

39
Q

if the wheel bearing has become contaminated and spun on the spindle what must be done

A

you must replace the spindle

40
Q

when measuring the cross tube assembly for looseness what is the maximum allowable wear

A

1.5mm or 0.060’’

41
Q

when removing a steering wheel what are a few things to consider

A

.make an alignment mark on the steering wheel and steering column before removal
. do not damage the horn wires during removal and make sure they are properly routed during assembly

42
Q

what are a couple problems that can seem like or act like steering problems

A

low tire pressure or a dragging brake also rear axle alignment problems

43
Q

when must you adjust automatic adjusting poppets

A

. changing to a larger tire
. reducing wheel cut for any reason
. damaged steering stop bolts that have been replaced
. steering gear stop bolts that have been replaced

44
Q

at what temperature will oil start to break down

A

120C or 205F

45
Q

when inspecting the power steering oil and you find the oil is burnt or contaminated you must

A

flush the system

46
Q

when removing SRS air bag what are a few precautions to be taken

A

apply park brake and wheel chocks
. disconnect the batteries and wait two minutes
. loosen retaining screws
. carefully lift the air bag and remove wires

47
Q

when installing grease seals what direction must the lip be facing

A

toward the center of the knuckle

48
Q

when the pitman arm has been removed from the sector shaft what will happen if the steering gear is turned more than 1 1/2 times

A

it will affect the initial poppet valve setting and it will have to be reset

49
Q

what is one check to make before removing a steering wheel

A

check to see if it has a SRS system

50
Q

when should you replace a pressure relief valve during a load test

A

if the pressure rises above the intended spec or the pressure is erratic during the test

51
Q

if the fastener that holds the pitman arm to the drag link becomes loose and the mounting hole becomes damaged what should you do

A

replace the pitman arm and draglink

52
Q

what are the two types of steering gear mounting configurations

A

standard and inverted

53
Q

is the clock spring serviceable

A

no

54
Q

when will manually adjusted poppets have to be adjusted

A

. replacing the steering gear with new or rebuilt
. changing the wheel cut for any reason
. replacing damaged steering stop bolts
. changing a damaged component that required the removal and installation of the steering stop

55
Q

when replacing a draglink end into the drag link tube what must you make sure of

A

that the threaded end is completely inserted into the drag link tube

56
Q

if the kingpin is seized can heat be used to remove the kingpin

A

no follow manufacture spec

57
Q

if a steering wheel has a master spline

A

it can only be installed in one position

58
Q

when replacing the king pin thrust bearing it should be placed where

A

between the underside of the axle and the bottom steering knuckle yolk

59
Q

when backing out a manual adjusting screw you should never go farther than

A

1” - 1 1/16 “ or you risk striping the threads

60
Q

when checking universal joints you must make sure that they are

A

in phase with each other

61
Q

what is important to remember when removing a steering column with a tilt or collapsible steering column

A

they are under spring tension and should be in the upright position to lessen spring tension

4th year HET (31 decks)

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