10-013-VEH: OOSC, Parte II, Artículo 9. Suspensiones, e. Agujeros de pasador de bloqueo desgastados (en forma de huevo)

Fecha de registro	10 de mayo de 2010
Número de asunto	10-013-VEH
Nombre	Nathan Cook
Agencia	Ontario Ministry of Transportation
Dirección	659 Exeter RoadLondon, ON,, N6E 1L3CanadaVer en el mapa (se abre en una pestaña nueva)
Teléfono	519-268-8240
Fax	(519) 268-2518
Correo electrónico	[email protected]
Comité	Comité de Vehículos
Estado	Cerrado
Resumen del asunto	Los deslizadores de los bogies de un remolque de dos ejes presentan desgaste ovalado en la zona donde se asientan los pasadores que los fijan. Parece que los sujetadores de las ruedas están flojos. Los bogies se movían. Realicé una prueba en los bogies, similar a la de una quinta rueda, y observé movimiento. No encontré ninguna referencia a esta condición en los Out-of-Service Criteria (OOSC) de Norteamérica.
Justificación o necesidad	¿Están los deslizadores desgastados hasta el punto de que los bogies se sueltan cuando el remolque está en movimiento? Debería revisarse este problema; no estoy seguro de si ha ocurrido antes.
Solicitud de acción	Se realizó una investigación para determinar si los pasadores se soltarían debido al alargamiento de los orificios, ¿quizás se agregó algo al OOSC?
Medidas adoptadas por el comité	Pictures were displayed of a condition on a sliding sub frame that had worn elongated egg-shaped holes were the pins seat to secure the adjustable axle. The bogies did move slightly in the holes with the locking pin engaged. There is currently nothing in the OOS criteria to address this issue, there is also nothing in regulation to support this as a violation. Information was presented and read from a Technical Bulletin from TMC. The information from the TMC Bulletin outlined that if holes are worn they will result in slack however, the document indicated at that point it is a maintenance issue. The document goes on to say that if that condition is not addressed, that the slack may result in splits or tears between the holes and at the point, the vehicle should not be operated. Based on the information received and the fact that there was no supporting crash data presented related to worn locking pin holes on sliding sub frames the issue was closed. Paul Johnston offered to try and get some information regarding specifics on sliding sub-frames to better determine if there are other conditions that should be addressed in the OOS. The issue will be closed off but can be re-opened if he reports back with further findings. At the Chicago meeting further research information from TTMA and TMC and specific suspension manufacturers related to the issue that was discussed in Anaheim regarding worn elongated sub frame holes, as well as damage or cracks in the rail and slider-guides/hold down brackets was presented. Several pictures were shown of worn out holes, splits in rails and missing or ?jumped? guards. The suspension manufacturers provided the committee with a maintenance standard as well as recommended OOS criteria. Concerns were addressed for not only the holes, but it was determined that any condition regarding locking pins or holes, when added together, resulting in more than one-fourth of the holes/pins being affected, that the OOS condition should apply. The committee unanimously voted to amend the entire paragraph 9.e. in the OOSC to include the new language as well as incorporate the existing OOS condition for locking pins as follows: 9 e. Adjustable Axle(s)/Sliding Trailer Suspension System ?More than one-fourth of the locking pins or locking pin holes that are in use meet any of the following conditions: o locking pin is missing or not engaged o a locking-pin hole measures more than 1.00 inch (25mm) larger than its original size o the material from the hole in use to an adjacent hole, or the material from the hole in use to the edge of the rail, is torn or split ?More than one-fourth of the slider-guide/hold-down brackets are missing or disengaged. NOTE: The Executive Committee approved the amendment as written.

Fecha de registro

10 de mayo de 2010

Número de asunto

10-013-VEH

Nombre

Nathan Cook

Agencia

Ontario Ministry of Transportation

Dirección

659 Exeter RoadLondon, ON,, N6E 1L3CanadaVer en el mapa

Teléfono

519-268-8240

Fax

(519) 268-2518

Correo electrónico

[email protected]

Comité

Comité de Vehículos

Estado

Cerrado

Resumen del asunto

Los deslizadores de los bogies de un remolque de dos ejes presentan desgaste ovalado en la zona donde se asientan los pasadores que los fijan. Parece que los sujetadores de las ruedas están flojos. Los bogies se movían. Realicé una prueba en los bogies, similar a la de una quinta rueda, y observé movimiento. No encontré ninguna referencia a esta condición en los Out-of-Service Criteria (OOSC) de Norteamérica.

Justificación o necesidad

¿Están los deslizadores desgastados hasta el punto de que los bogies se sueltan cuando el remolque está en movimiento? Debería revisarse este problema; no estoy seguro de si ha ocurrido antes.

Solicitud de acción

Se realizó una investigación para determinar si los pasadores se soltarían debido al alargamiento de los orificios, ¿quizás se agregó algo al OOSC?

Medidas adoptadas por el comité

Pictures were displayed of a condition on a sliding sub frame that had worn elongated egg-shaped holes were the pins seat to secure the adjustable axle. The bogies did move slightly in the holes with the locking pin engaged. There is currently nothing in the OOS criteria to address this issue, there is also nothing in regulation to support this as a violation. Information was presented and read from a Technical Bulletin from TMC. The information from the TMC Bulletin outlined that if holes are worn they will result in slack however, the document indicated at that point it is a maintenance issue. The document goes on to say that if that condition is not addressed, that the slack may result in splits or tears between the holes and at the point, the vehicle should not be operated. Based on the information received and the fact that there was no supporting crash data presented related to worn locking pin holes on sliding sub frames the issue was closed. Paul Johnston offered to try and get some information regarding specifics on sliding sub-frames to better determine if there are other conditions that should be addressed in the OOS. The issue will be closed off but can be re-opened if he reports back with further findings.

At the Chicago meeting further research information from TTMA and TMC and specific suspension manufacturers related to the issue that was discussed in Anaheim regarding worn elongated sub frame holes, as well as damage or cracks in the rail and slider-guides/hold down brackets was presented. Several pictures were shown of worn out holes, splits in rails and missing or ?jumped? guards. The suspension manufacturers provided the committee with a maintenance standard as well as recommended OOS criteria.

Concerns were addressed for not only the holes, but it was determined that any condition regarding locking pins or holes, when added together, resulting in more than one-fourth of the holes/pins being affected, that the OOS condition should apply.

The committee unanimously voted to amend the entire paragraph 9.e. in the OOSC to include the new language as well as incorporate the existing OOS condition for locking pins as follows:

9 e. Adjustable Axle(s)/Sliding Trailer Suspension System ?More than one-fourth of the locking pins or locking pin holes that are in use meet any of the following conditions:

o locking pin is missing or not engaged o a locking-pin hole measures more than 1.00 inch (25mm) larger than its original size o the material from the hole in use to an adjacent hole, or the material from the hole in use to the edge of the rail, is torn or split

?More than one-fourth of the slider-guide/hold-down brackets are missing or disengaged.

NOTE: The Executive Committee approved the amendment as written.