The problem
The involved vehicles do not conform to federal motor vehicle safety standard no. 121, "Air brake systems". The two "o" rings that are supplied along with the new shuttle valves are of a buna "v" quality. These rings are fully functional in normal climate conditions, however, in extremely cold environments, slight leaks may develop. This valve acts as a seal between the cylinder heads of the shuttle valve and the piston. In time this seal may expand or "pucker up", making it possible for the shuttle to become trapped in an emergency braking situation.
The fix
The dealer will replace all defective "o" rings with ones having extreme cold resistance properties.
Contacts
Vehicle description: motor homes equipped with new shuttle valves.System: service brakes; air control valve.Consequences of defect: in this event, the brakes once "on" will not releaseand loss of vehicle control and an accident could result.Note: driver should be alerted to this condition by a flashing light, buzzer,and a low reading on the air gauge.
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 Motor Coach dealer will do the repair free, whether or not you bought the vehicle there. Quote campaign 77V186000.
- 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.