System: brakes; air systems; lines; hose; non-metallic. Vehicle description: front and rear loading garbage trucks mounted on mack chassis with "camelback" suspensions and "ridewell" pusher axles.note: owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact heil at 1-800-258-7251. Also contact the national highway traffic safety administration's auto safety hotline at 1-800-424-9393.