Where is this used?

[Radacravitz]

Going through my previous owner’s paperwork I came across the receipt for one of these being purchased several years ago. Because the previous owner has memory issues there is no recollection of the work being done.

My question is where is this particular device used – service breaks, airbrakes … someplace else?

thx in advance for any / all feedback.

[Skip426]

Best guess ; would be a component in the ABS control portion of the air brake system or; if your coach is equipped Traction Control .

Contact your chassis manufacturer for an air system diagram , it'll show up there.

[Radacravitz]

super, thx very much, skip. we’ve got ABS on the coach but the only traction control is my best guess ;-)

thx again for the feedback.

[veraken]

See the following:

WM90DX Fail Safe Pressure Modulating Valve: Brake Systems Inc Store