Hydraulic antilock brake systems Flashcards

1
Q

what type of brake fluid is not recommended in hydraulic ABS system

A

DOT 5 because it is not hydroscopic and retains tiny air bubbles

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2
Q

during brake activation the operator feels the brake pedal pulsate . is this normal

A

yes . the degree to which the pedal pulsates depends on the type of system installed

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3
Q

how many inlet - outlet solenoid control valves would a ABS modulator assembly have

A

one per monitored wheel

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4
Q

what can also be contained in the ABS modulator valve

A

high powered electro hydraulic pump and one or two accumulators

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5
Q

in the event of a ABS failure in one system when would happen

A

brake function would continue as normal and a indicator warning light would illuminate to warn the operator of the failure

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6
Q

before doing any work on the hydraulic ABS system what should you make sure of first

A

all pressure in the brake system has be depressurized . about 30 hard brake applications with the ignition key in the off position

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7
Q

what is one method for installing a tone ring

A

heat the tone ring evenly by boiling water or oven to 250 degrees then tap gently into place on the wheel hub

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8
Q

after installing a new tone ring what should be checked

A

runout

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9
Q

if the wrong brake fluid is used in the system what should be done

A

flush with DOT 3 or DOT 4 or manufacture recommended fluid

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