The problem
A manufacturing error resulted in the installation of carbon steel springs in some dual-compartment air reservoir check valves. Carbon steel springs are inadequate for this application because they are subject to severe corrosion and subsequent failure of the check valve.
The fix
The carbon steel spring will be replaced with a stainless steel one.
Contacts
Vehicle description: heavy trucks.System: service brakes; dual compartment air reservoir check valve.Consequences of defect: if this check valve failure were combined with asevered line in the primary air system, complete loss of brakes and possiblevehicle crash could occur.
What to do
- Check your VIN. Enter it at nhtsa.gov/recalls - it shows whether this recall applies to your vehicle and whether the repair has been done.
- Call a dealer. Any authorized Mack dealer will do the repair free, whether or not you bought the vehicle there. Quote campaign 84V035000.
- Ask about parts and a loaner. If parts aren't available yet, ask what to do in the meantime.
- Keep your paperwork. If you paid for this repair before the recall, you may be able to get reimbursed - here's how.