Commercial Vehicle Safety Alliance

Fecha de registro	16 de febrero de 2015
Número de asunto	15-007-VEH
Nombre	Barry Bertoli
Agencia	Commercial Vehicle Safety and Enforcement
Dirección	4791 23rd StreetVernon, British Columbia, V1T 4K7CanadaVer en el mapa (se abre en una pestaña nueva)
Teléfono	250-833-6456
Fax	(250) 503-3631
Correo electrónico	[email protected]
Comité	Comité de Vehículos
Estado	Cerrado
Resumen del asunto	CVSA OOS 1 de abril de 2015, Sección 9 dirección subsección F, OOS si el cilindro de asistencia de potencia auxiliar está suelto. Hemos visto casos en los que el propietario ha quitado el cilindro y tapado las líneas, creo que sería una mención honorífica para el equipo en la sede de CVSA incluir el cilindro faltante en CVSA OOS. El primer problema fue reportado por un camión de combustible (1203) en mi área y ordené el vehículo para reparación a pesar de que en ese momento el eje estaba soportando 9100 kg o 20000 lb con neumáticos 445.
Justificación o necesidad	Personalmente, he visto este problema dos veces en dos años en el cilindro auxiliar acoplado a la mangueta de dirección derecha. En la mayoría de los casos, este cilindro está presente en ejes con una capacidad de carga de 8600 kg (18959 lb) o superior. Cuando el cilindro empieza a tener fugas, simplemente se retira y se sellan las tuberías.
Solicitud de acción	Creo que debería incluirse una condición de fuera de servicio en la subsección F de la dirección de la Sección 9 si falta el cilindro cuando lo requiere el fabricante de equipos originales (OEM).
Medidas adoptadas por el comité	At the meeting in Jacksonville it was suggested that a missing auxiliary cylinder only makes it harder to steer but it is not an imminent hazard. It is more of a requirement to be there to assist a driver in a stationary position or at low speeds in construction zones, etc. That led to the committee wondering whether the loose cylinder should even be in the OOS. The discussion was around why it was put in the OOS originally as it has been in their since the beginning. It was suggested that it was in there for so long that it may have been intended for the older air assist cylinders. Steve Howse had spoken to representatives at TMA and brought back information that the power steering box provides 60% of the assist to the steering in these cases and at road speeds the assist has virtually no impact to the driver. The absence of the power assist cylinder will reduce the life of the steering box due to turns at low speeds, however that is a maintenance issue and should not be an OOS violation. It was reported that a missing cylinder would not be considered an imminent hazard. There was a motion made to delete the condition of a loose auxiliary power assist cylinder from OOSC based on the information. However, during discussion it was determined that a significantly loose or detached cylinder could get wedged in the steering mechanism and cause steering interference, but a slightly loose cylinder is not an OOSC. The motion failed. Steve Howse contacted his sources to determine if it should be removed or amended in the OOS. Steve reported the following day that a very loose cylinder could have impact as discussed. The committee voted to amend the current language in the OOS to quantify how loose the cylinder should be to be considered OOS. The language used is consistent with the language the committee has used to determine the looseness of an air reservoir. This language takes into consideration a loose nut and bolt which does not provide movement of more than an inch. The committee voted unanimously to amend the existing language to only include cylinders that are significantly loose but not those that may just have a slightly loose mounting. The amendment is as follows: f. Power Steering Auxiliary power assist cylinder separated at either end from the attachment point(s) allowing movement of more than one inch (25.4 mm) in any direction.(393.209(e)) NOTE: The motion was passed by Executive Committee.

Fecha de registro

16 de febrero de 2015

Número de asunto

15-007-VEH

Nombre

Barry Bertoli

Agencia

Commercial Vehicle Safety and Enforcement

Dirección

4791 23rd StreetVernon, British Columbia, V1T 4K7CanadaVer en el mapa

Teléfono

250-833-6456

Fax

(250) 503-3631

Correo electrónico

[email protected]

Comité

Comité de Vehículos

Estado

Cerrado

Resumen del asunto

CVSA OOS 1 de abril de 2015, Sección 9 dirección subsección F, OOS si el cilindro de asistencia de potencia auxiliar está suelto. Hemos visto casos en los que el propietario ha quitado el cilindro y tapado las líneas, creo que sería una mención honorífica para el equipo en la sede de CVSA incluir el cilindro faltante en CVSA OOS. El primer problema fue reportado por un camión de combustible (1203) en mi área y ordené el vehículo para reparación a pesar de que en ese momento el eje estaba soportando 9100 kg o 20000 lb con neumáticos 445.

Justificación o necesidad

Personalmente, he visto este problema dos veces en dos años en el cilindro auxiliar acoplado a la mangueta de dirección derecha. En la mayoría de los casos, este cilindro está presente en ejes con una capacidad de carga de 8600 kg (18959 lb) o superior. Cuando el cilindro empieza a tener fugas, simplemente se retira y se sellan las tuberías.

Solicitud de acción

Creo que debería incluirse una condición de fuera de servicio en la subsección F de la dirección de la Sección 9 si falta el cilindro cuando lo requiere el fabricante de equipos originales (OEM).

Medidas adoptadas por el comité

At the meeting in Jacksonville it was suggested that a missing auxiliary cylinder only makes it harder to steer but it is not an imminent hazard. It is more of a requirement to be there to assist a driver in a stationary position or at low speeds in construction zones, etc. That led to the committee wondering whether the loose cylinder should even be in the OOS. The discussion was around why it was put in the OOS originally as it has been in their since the beginning. It was suggested that it was in there for so long that it may have been intended for the older air assist cylinders.

Steve Howse had spoken to representatives at TMA and brought back information that the power steering box provides 60% of the assist to the steering in these cases and at road speeds the assist has virtually no impact to the driver. The absence of the power assist cylinder will reduce the life of the steering box due to turns at low speeds, however that is a maintenance issue and should not be an OOS violation. It was reported that a missing cylinder would not be considered an imminent hazard.

There was a motion made to delete the condition of a loose auxiliary power assist cylinder from OOSC based on the information. However, during discussion it was determined that a significantly loose or detached cylinder could get wedged in the steering mechanism and cause steering interference, but a slightly loose cylinder is not an OOSC. The motion failed. Steve Howse contacted his sources to determine if it should be removed or amended in the OOS. Steve reported the following day that a very loose cylinder could have impact as discussed.

The committee voted to amend the current language in the OOS to quantify how loose the cylinder should be to be considered OOS. The language used is consistent with the language the committee has used to determine the looseness of an air reservoir. This language takes into consideration a loose nut and bolt which does not provide movement of more than an inch.

The committee voted unanimously to amend the existing language to only include cylinders that are significantly loose but not those that may just have a slightly loose mounting. The amendment is as follows:

f. Power Steering Auxiliary power assist cylinder separated at either end from the attachment point(s) allowing movement of more than one inch (25.4 mm) in any direction.(393.209(e))

NOTE: The motion was passed by Executive Committee.

OOSC, Parte II, Artículo 9. Mecanismos de dirección - Cilindro de asistencia de potencia auxiliar