Transport CanadaCritical
At a glance
What can fail
The piston in the anti-lock relay valve may expand when exposed to certain fluid contaminants in the air brake system. An expanded piston can stick or jam, blocking air delivery to the brake chambers and reducing braking power on that axle.
What the fix does
No remedy description available.
254 vehicles affected
Transport Canada #1979131 — full official notice →Summarized — see the official notice for exact wording, dates, and contacts.