13-032-PCC: Advertencia de baja presión de aire de VanHool

Fecha de registro	30 de agosto de 2013
Número de asunto	13-032-PCC
Nombre	Wes Bement
Agencia	Grand Prairie Police Department
Dirección	1525 Arkansas LaneGrand Prairie, TX, 75052United StatesVer en el mapa (se abre en una pestaña nueva)
Teléfono	972-841-2799
Correo electrónico	[email protected]
Comité	Comité de Transporte de Pasajeros
Estado	Cerrado
Resumen del asunto	Durante una visita reciente a Gotta Go Trailways, realizamos varias inspecciones de Nivel V. Todos los autobuses VanHool presentaban un problema con la advertencia de baja presión de aire, que no se activaba hasta alcanzar los 35 psi. Al hablar con el representante, Bernard Johnson, nos comentó que VanHool les había informado que los autobuses se fabricaron con una configuración de 35 psi para la advertencia de baja presión de aire. En una conversación posterior con él, nos indicó que Carlos Saucedo, de la FMCSA (915-532-1366), le había dicho que, según la norma 393.51, 35 psi es aceptable porque después de "55 psi" se especifica "y por debajo".
Justificación o necesidad	Por favor, indíquenos si esta interpretación de la normativa es correcta o si 55 psi es el mínimo para la advertencia de baja presión de aire.
Solicitud de acción	Necesito una interpretación sobre cuál es el mínimo absoluto para que se active una advertencia de baja presión de aire en un vehículo.
Medidas adoptadas por el comité	Closed no action taken. Explanation - 393.51(c) applies to those vehicles that meet FMVSS 121. The 121 standard, specifically "S5.1.5" states the warning device must activate below 60 psi. If it is not built to 121 standards then you apply 393.51(c) subdivision(1) and (2). Reference: S5.1.5 Warning signal. A signal, other than a pressure gauge, that gives a continuous warning to a person in the normal driving position when the ignition is in the “on” (“run”) position and the air pressure in the service reservoir system is below 60 psi. The signal shall be either visible within the driver's forward field of view, or both audible and visible. 393.51(c)Air brakes. A commercial motor vehicle (regardless of the date of manufacture) equipped with service brakes activated by compressed air (air brakes) or a commercial motor vehicle towing a vehicle with service brakes activated by compressed air (air brakes) must be equipped with a pressure gauge and a warning signal. Trucks, truck tractors, and buses manufactured on or after March 1, 1975, must, at a minimum, have a pressure gauge and a warning signal which meets the requirements of FMVSS No. 121 (S5.1.4 for the pressure gauge and S5.1.5 for the warning signal) applicable to the vehicle on the date of manufacture of the vehicle. Power units to which FMVSS No. 571.121 was not applicable on the date of manufacture of the vehicle must be equipped with— (1) A pressure gauge, visible to a person seated in the normal driving position, which indicates the air pressure (in kilopascals (kPa) or pounds per square inch (psi)) available for braking; and (2) A warning signal that is audible or visible to a person in the normal driving position and provides a continuous warning to the driver whenever the air pressure in the service reservoir system is at 379 kPa (55 psi) and below, or one-half of the compressor governor cutout pressure, whichever is less.

Fecha de registro

30 de agosto de 2013

Número de asunto

13-032-PCC

Nombre

Wes Bement

Agencia

Grand Prairie Police Department

Dirección

1525 Arkansas LaneGrand Prairie, TX, 75052United StatesVer en el mapa

Teléfono

972-841-2799

Correo electrónico

[email protected]

Comité

Comité de Transporte de Pasajeros

Estado

Cerrado

Resumen del asunto

Durante una visita reciente a Gotta Go Trailways, realizamos varias inspecciones de Nivel V. Todos los autobuses VanHool presentaban un problema con la advertencia de baja presión de aire, que no se activaba hasta alcanzar los 35 psi. Al hablar con el representante, Bernard Johnson, nos comentó que VanHool les había informado que los autobuses se fabricaron con una configuración de 35 psi para la advertencia de baja presión de aire. En una conversación posterior con él, nos indicó que Carlos Saucedo, de la FMCSA (915-532-1366), le había dicho que, según la norma 393.51, 35 psi es aceptable porque después de "55 psi" se especifica "y por debajo".

Justificación o necesidad

Por favor, indíquenos si esta interpretación de la normativa es correcta o si 55 psi es el mínimo para la advertencia de baja presión de aire.

Solicitud de acción

Necesito una interpretación sobre cuál es el mínimo absoluto para que se active una advertencia de baja presión de aire en un vehículo.

Medidas adoptadas por el comité

Closed no action taken.

Explanation - 393.51(c) applies to those vehicles that meet FMVSS 121. The 121 standard, specifically "S5.1.5" states the warning device must activate below 60 psi. If it is not built to 121 standards then you apply 393.51(c) subdivision(1) and (2).

Reference: S5.1.5 Warning signal. A signal, other than a pressure gauge, that gives a continuous warning to a person in the normal driving position when the ignition is in the “on” (“run”) position and the air pressure in the service reservoir system is below 60 psi. The signal shall be either visible within the driver's forward field of view, or both audible and visible.

393.51(c)Air brakes. A commercial motor vehicle (regardless of the date of manufacture) equipped with service brakes activated by compressed air (air brakes) or a commercial motor vehicle towing a vehicle with service brakes activated by compressed air (air brakes) must be equipped with a pressure gauge and a warning signal. Trucks, truck tractors, and buses manufactured on or after March 1, 1975, must, at a minimum, have a pressure gauge and a warning signal which meets the requirements of FMVSS No. 121 (S5.1.4 for the pressure gauge and S5.1.5 for the warning signal) applicable to the vehicle on the date of manufacture of the vehicle. Power units to which FMVSS No. 571.121 was not applicable on the date of manufacture of the vehicle must be equipped with— (1) A pressure gauge, visible to a person seated in the normal driving position, which indicates the air pressure (in kilopascals (kPa) or pounds per square inch (psi)) available for braking; and (2) A warning signal that is audible or visible to a person in the normal driving position and provides a continuous warning to the driver whenever the air pressure in the service reservoir system is at 379 kPa (55 psi) and below, or one-half of the compressor governor cutout pressure, whichever is less.