09-045-VEH: procedimientos de inspección de nivel I y nivel V: uso de valores PBBT en lugar de medir la longitud de la carrera del freno.

Fecha de registro	18 de septiembre de 2009
Número de asunto	09-045-VEH
Nombre	Luke Loy
Agencia	Federal Motor Carrier Safety Administration (FMCSA)
Dirección	1200 New Jersey Avenue, SEWashington, DC, 20590United StatesVer en el mapa (se abre en una pestaña nueva)
Teléfono	202-366-0676
Correo electrónico	[email protected]
Comité	Comité de Vehículos
Estado	Cerrado
Resumen del asunto	Permitir el uso de la inspección PBBT en lugar de medir la longitud de la carrera durante las inspecciones de Nivel I o Nivel V.
Justificación o necesidad	En el caso de vehículos con frenos de disco o vehículos con poca altura libre al suelo, el inspector no puede realizar mediciones físicas de la longitud del recorrido del freno.
Solicitud de acción	Permitir que los resultados de la prueba de frenado PBBT se utilicen en lugar de las mediciones físicas de la longitud de carrera para los frenos de aire durante una inspección de Nivel I o Nivel V. La consulta con el Departamento de Transporte de Tennessee dio como resultado la propuesta adjunta para modificar el procedimiento de Nivel I. La intención es modificar también el procedimiento de Nivel V una vez que se apruebe la modificación del procedimiento de Nivel Uno. Véase el Anexo.
Medidas adoptadas por el comité	The request was intended to reduce duplication of effort. It was clarified that all other brake components will still be inspected per the applicable inspection procedure if the PBBT is used. The issue was tabled at the spring meeting in order to allow the Associate Advisory Committee to provide their feedback. After clarification of a couple of their concerns they were supportive of the amended procedure. The brake manufacturers, went on record as not in support of the change. They still felt that there was value in measuring stroke travel. They did not have enough data to support the decision. Concerns were raised in regard to the vehicle being inspected with a PBBT and a decal being issued when stroke is not measured and then being re-inspected and a brake found to be out of adjustment. The representatives from the jurisdictions in the meeting that are currently using PBBT to do brake inspections did not have an issue with making the amendment to the procedure. They indicated that normally if they see a problem at a wheel end, they will inspect it thoroughly. It was also made perfectly clear that by making this amendment, it in no way would disallow an inspector from doing pushrod stroke meausurements during a Level I when a PBBT is used if the inspector deemed it still necessary. The amendment would affect 3 steps in both the Level I and Level V procedure. The following note additions were presented as follows: Step 3: GREET AND PREPARE DRIVER If available, conduct a Performance Based Brake Test (PBBT) Note: Refer to the North American Standard Inspection Procedure for Performance-Based Brake Testing (PBBT). Step 28: INSPECT STEERING AXLE(S) Drum (Cam-Type Brakes) Note: The Marking and Measuring Of Pushrod Travel Is Not Required If A Performance Based Brake Test (PBBT) Has Been Completed Air Disc Brakes (Exposed Pushrods) Note: The Marking and Measuring Of Pushrod Travel Is Not Required If A Performance Based Brake Test (PBBT) Has Been Completed Step 31: PREPARE THE VEHICLE AND CHECK BRAKE ADJUSTMENT Measure Pushrod Travel (All Brakes) (If Applicable) Note: The Marking and Measuring Of Pushrod Travel Is Not Required If A Performance-Based Brake Test (PBBT) Has Been Completed. The Level V Inspection Procedure Steps 1, 16 and 18 would be amended in the same format. This would also require a change to Operational Policy 5 for Brake Measurements. It currently states: BRAKE MEASUREMENTS It shall be the policy of CVSA to record on inspection forms all brake measurements during North American Standard Level I and Level V Inspections. If voted through by Executive Committee the policy will have to be amended to address that if a PBBT is used the Level I or V inspection report will not have brake measurements recorded.

Fecha de registro

18 de septiembre de 2009

Número de asunto

09-045-VEH

Nombre

Luke Loy

Agencia

Federal Motor Carrier Safety Administration (FMCSA)

Dirección

1200 New Jersey Avenue, SEWashington, DC, 20590United StatesVer en el mapa

Teléfono

202-366-0676

Correo electrónico

[email protected]

Comité

Comité de Vehículos

Estado

Cerrado

Resumen del asunto

Permitir el uso de la inspección PBBT en lugar de medir la longitud de la carrera durante las inspecciones de Nivel I o Nivel V.

Justificación o necesidad

En el caso de vehículos con frenos de disco o vehículos con poca altura libre al suelo, el inspector no puede realizar mediciones físicas de la longitud del recorrido del freno.

Solicitud de acción

Permitir que los resultados de la prueba de frenado PBBT se utilicen en lugar de las mediciones físicas de la longitud de carrera para los frenos de aire durante una inspección de Nivel I o Nivel V. La consulta con el Departamento de Transporte de Tennessee dio como resultado la propuesta adjunta para modificar el procedimiento de Nivel I. La intención es modificar también el procedimiento de Nivel V una vez que se apruebe la modificación del procedimiento de Nivel Uno. Véase el Anexo.

Medidas adoptadas por el comité

The request was intended to reduce duplication of effort. It was clarified that all other brake components will still be inspected per the applicable inspection procedure if the PBBT is used. The issue was tabled at the spring meeting in order to allow the Associate Advisory Committee to provide their feedback. After clarification of a couple of their concerns they were supportive of the amended procedure.

The brake manufacturers, went on record as not in support of the change. They still felt that there was value in measuring stroke travel. They did not have enough data to support the decision.

Concerns were raised in regard to the vehicle being inspected with a PBBT and a decal being issued when stroke is not measured and then being re-inspected and a brake found to be out of adjustment. The representatives from the jurisdictions in the meeting that are currently using PBBT to do brake inspections did not have an issue with making the amendment to the procedure. They indicated that normally if they see a problem at a wheel end, they will inspect it thoroughly. It was also made perfectly clear that by making this amendment, it in no way would disallow an inspector from doing pushrod stroke meausurements during a Level I when a PBBT is used if the inspector deemed it still necessary. The amendment would affect 3 steps in both the Level I and Level V procedure. The following note additions were presented as follows:

Step 3: GREET AND PREPARE DRIVER

If available, conduct a Performance Based Brake Test (PBBT) Note: Refer to the North American Standard Inspection Procedure for Performance-Based Brake Testing (PBBT).

Step 28: INSPECT STEERING AXLE(S)

Drum (Cam-Type Brakes)

Note: The Marking and Measuring Of Pushrod Travel Is Not Required If A Performance Based Brake Test (PBBT) Has Been Completed Air Disc Brakes (Exposed Pushrods)

Note: The Marking and Measuring Of Pushrod Travel Is Not Required If A Performance Based Brake Test (PBBT) Has Been Completed

Step 31: PREPARE THE VEHICLE AND CHECK BRAKE ADJUSTMENT

Measure Pushrod Travel (All Brakes) (If Applicable)

Note: The Marking and Measuring Of Pushrod Travel Is Not Required If A Performance-Based Brake Test (PBBT) Has Been Completed.

The Level V Inspection Procedure Steps 1, 16 and 18 would be amended in the same format. This would also require a change to Operational Policy 5 for Brake Measurements. It currently states:

BRAKE MEASUREMENTS It shall be the policy of CVSA to record on inspection forms all brake measurements during North American Standard Level I and Level V Inspections.

If voted through by Executive Committee the policy will have to be amended to address that if a PBBT is used the Level I or V inspection report will not have brake measurements recorded.