NHTSA recall 88V171000
Service brakes, air › Supply › Low pressure warning › Switch
Emergency One Ambulance
Reported Nov 1, 198871 vehicles affectedE-ONE, INC.Built Jan 1, 1977 – Jan 1, 1988
The defect
Use of the air horn can cause the air pressure to drop below 85 psi.
The risk
If air pressure drops below 85 psi while the vehicle isbeing driven the rear brake spring chambers will start to apply causing therear brake drums to overheat.
The remedy
Install pressure protection valves in all air horn circuits.