Hydraulic antilock brake systems

Question 1

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

Answer 1

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

Question 2

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

Answer 2

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

Question 3

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

Answer 3

one per monitored wheel

Question 4

what can also be contained in the ABS modulator valve

Answer 4

high powered electro hydraulic pump and one or two accumulators

Question 5

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

Answer 5

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

Question 6

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

Answer 6

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

Question 7

what is one method for installing a tone ring

Answer 7

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

Question 8

after installing a new tone ring what should be checked

Answer 8

runout

Question 9

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

Answer 9

flush with DOT 3 or DOT 4 or manufacture recommended fluid