Air ABS Modulator

This video was made for training of technicians using cutaway photos, training aids or shop space of The Southern Alberta Institute of Technology. This video is made to be an open resource for the instruction of the Heavy Equipment Industry and can be used for said purpose and may not be duplicated for commercial distribution or retail.

[@user-zv1yu6pn9j]

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[@coymackenzie5819]

Could a faulty modulator valve lock up my brakes instead of pulsing when wheel slip is detected?

[@aled1685]

What is the part number for that abs

[@pellonda1]

Great video What happens if is leaking when I press brakes and is not a chamber

[@goofyahhcat12345]

do you fix a problem because I'm having the same thing when I press my brakes only the left licks air when I hit it like twice it stops. Did you fix the problem?

[@pellonda1]

Mine leaks and i give it a little hit and it stops leaking. Could it be that is goin bad?

[@THET1916]

Likely one of the poppets are not seating internally causing the leak through the exhaust port. They are not easily serviceable as in parts are not really available for reseal. The recommendation would be replacement, if you are remote and it’s urgent the short term fix may be disassembly, clean and reassemble. If you do this though keep track of poppet orientations, seal install direction and cover seals. Not recommended but if you have no other option do so at your own discretion.

[@thermroberts380]

Are the valves interchangeable? My setup is bendix. Will a wabco valve work, or should I order the bendix replacement? ​@@THET1916